Ahuja LXA-7600 User manual

LXA-7600
Dual Channel
Power Amplifier
OPERATION MANUAL
OPERATION MANUAL
3800W + 3800W RMS
8Please read this manual thoroughly before making connections and turning on the power.
Following the instructions in this manual will enable you to obtain optimum performance from your
new AHUJA Direct Coupled Amplifier.
8Thank you for purchasing the AHUJA Direct Coupled Amplifier.
8Please retain this manual for future reference.
®
7600

• Safety Instructions
2
LXA-7600
Contents Page No.
!Features / G eneral Description of Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
!Setup & Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
!Tips for Safe Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
!Typical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
!Protections & Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
!Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
!Front Panel Controls & Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
!Rear Panel Controls & Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
!Input - Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
! Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
• Table of Contents
3LXA-7600
Stability: This set must be kept in a stable and flat horizontal position, and never in a tilted position. Do not place this
set on an unstable stand, tripod, bracket or mount. Do not use attachments which are not supplied or explicitly
recommended by the manufacturer.
This symbol, wherever it appears, alerts you to the presence of uninsulated hazardous voltage that
may be sufficient to constitute a risk of electric shock. External wiring to any terminal marked with this
symbol must be done by a trained and instructed person only.
Read the Instructions: Please read all the instructions in this section carefully before installation or use of the
product. All the safety instructions must be followed.
Ventilation: This set should be situated so that its location or position does not interfere with its proper ventilation.
Do not cover the ventilation holes / slots. Do not insert or drop anything into the ventilation holes / slots.
This symbol, wherever it appears adjacent to a component, alerts you that the concerned
component can only be replaced by another of the exact same specifications.
CAUTIONS
Cleaning: Disconnect this equipment from the AC mains and external battery before cleaning. Clean with a damp
cloth, but do not allow any liquid to enter the set. Do not clean with liquids or aerosols.
Retain the Instructions: Please retain this Instruction Manual for future reference.
lTo reduce the risk of electric shock, do not remove the top cover. No user serviceable parts inside. Refer all
servicing to qualified personnel only.
Operation on Generator: When operating this set on a generator, make sure the set is switched off till the
generator voltage has stabilized.
WARNING
Power Source: The voltage & frequency of the AC mains supply, to which this set can be connected, is marked on
the rear panel of the set. Do not connect this set to any power source other than those specified on the rear panel.
Earthing: This set must be earthed properly before use. A wire from the Earth terminal on the rear panel must be
connected to electrical earth.
lBefore replacing any fuse, make sure the set is switched off and disconnected from the AC mains or any other
power source. Replace a fuse only with another of exactly same specification.
Power Cord Protection: Do not cut, kink, damage or modify the AC power cord supplied with this set. Keep the
AC power cord away from heaters and harmful chemicals. Do not keep any heavy object on the power cord.
Water & Moisture: To reduce the risk of fire or electrical shock, do not expose this set to rain or moisture. Do not
use this set near water or in a wet location. Do not keep any object filled with liquid, such as a vase, on top of this set.
Do not insert or remove the AC mains plug with wet hands.

• Safety Instructions
2
LXA-7600
Contents Page No.
!Features / G eneral Description of Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
!Setup & Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
!Tips for Safe Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
!Typical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
!Protections & Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
!Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
!Front Panel Controls & Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
!Rear Panel Controls & Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
!Input - Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
! Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
• Table of Contents
3LXA-7600
Stability: This set must be kept in a stable and flat horizontal position, and never in a tilted position. Do not place this
set on an unstable stand, tripod, bracket or mount. Do not use attachments which are not supplied or explicitly
recommended by the manufacturer.
This symbol, wherever it appears, alerts you to the presence of uninsulated hazardous voltage that
may be sufficient to constitute a risk of electric shock. External wiring to any terminal marked with this
symbol must be done by a trained and instructed person only.
Read the Instructions: Please read all the instructions in this section carefully before installation or use of the
product. All the safety instructions must be followed.
Ventilation: This set should be situated so that its location or position does not interfere with its proper ventilation.
Do not cover the ventilation holes / slots. Do not insert or drop anything into the ventilation holes / slots.
This symbol, wherever it appears adjacent to a component, alerts you that the concerned
component can only be replaced by another of the exact same specifications.
CAUTIONS
Cleaning: Disconnect this equipment from the AC mains and external battery before cleaning. Clean with a damp
cloth, but do not allow any liquid to enter the set. Do not clean with liquids or aerosols.
Retain the Instructions: Please retain this Instruction Manual for future reference.
lTo reduce the risk of electric shock, do not remove the top cover. No user serviceable parts inside. Refer all
servicing to qualified personnel only.
Operation on Generator: When operating this set on a generator, make sure the set is switched off till the
generator voltage has stabilized.
WARNING
Power Source: The voltage & frequency of the AC mains supply, to which this set can be connected, is marked on
the rear panel of the set. Do not connect this set to any power source other than those specified on the rear panel.
Earthing: This set must be earthed properly before use. A wire from the Earth terminal on the rear panel must be
connected to electrical earth.
lBefore replacing any fuse, make sure the set is switched off and disconnected from the AC mains or any other
power source. Replace a fuse only with another of exactly same specification.
Power Cord Protection: Do not cut, kink, damage or modify the AC power cord supplied with this set. Keep the
AC power cord away from heaters and harmful chemicals. Do not keep any heavy object on the power cord.
Water & Moisture: To reduce the risk of fire or electrical shock, do not expose this set to rain or moisture. Do not
use this set near water or in a wet location. Do not keep any object filled with liquid, such as a vase, on top of this set.
Do not insert or remove the AC mains plug with wet hands.

!Extensive protection circuit for Temperature (transistor and transformer),
Overload, DC, RFI and Output short circuit.
!Output termination on Dual Connectors (Speakon 4-way & Binding Post)
for each channel.
!Low distortion and high damping factor for excellent sound quality.
!Rugged 19" rack mountable chassis.
!Built in limiter circuit, which protects the amplifier and speaker from being
over driven because of high input level signal.
!Balanced / Unbalanced input signal through parallel XLR and 6.3mm (¼")
stereo phone jack in both channels.
!Slide switch selection of Mono / Stereo / Bridge Mode provided on rear
panel.
!Switchable ground lift to break the unwanted ground loops.
!Heavy duty high current toroidal transformer which provides excellent
regulation and minimises hum & noise.
!Indicator LEDs for Signal, Clip, Temperature (output devices and
transformer), Protect mode conditions.
!Low pass filter switchable to 80Hz & 120Hz to use for subwoofer
applications.
!Limiter On/Off switch.
• Features/General Description of Product
4
LXA-7600
• Front Panel Controls & Features
5LXA-7600
1. POWER Switch
To be used only in Stereo/Mono mode for adjusting
the volume level of channel B. This control is
inactive in Bridge mode.
3. Volume Control for Channel A
When used in Stereo/Mono mode, it adjusts the
volume level of channel A. While in Bridge mode, it
adjusts the volume level of both the channels A & B
connected in Bridge mode.
Push the top part of the knob (marked l)to switch the
amplifier ON. Push the bottom part of the knob
(marked o) to switch the amplifier OFF.
5. Temperature Indicator LEDs for Channel A & B
The power switch has in built magnetic circuit
protector. In case of overload, power supply circuit
failure or any short and at overload magnetic circuit
breaker of the switch will activate to trip switch to
OFF position. After rectifying the fault push the top
part switch knob to make amplifier “ON”
Separate yellow LEDs provided for each of the two
channels A & B. Glowing of these LEDs indicates
excessive temperature of the output devices or
transformer. The special circuitry then mutes the
input signals. The amplifier will remain at mute
status, till the devices cool down to normal
temperature. Switch OFF the amplifier to cool down
and then switch ON to continue.
6. Volume Control for Channel B
Indicate the presence of signal in channel A and B
respectively.
8. CLIP Level LEDs for Channel A & B
7. Protect Indicator LEDs for Channel A & B
4. Signal Indicator LEDs for Channel A & B
This LED glows when the amplifier is switched ON.
2. Power LED
Separate orange LED provided for each of the two
channels A & B. These LED’s glow when the output
is shorted or the output is overloaded or the input is
too high or DC voltage is present on the speaker
output. In any of these conditions the amplifier goes
to protect mode. To reset the amplifier, switch OFF
the amplifier, turn volume control to zero, correct
the fault, and switch ON the amplifier after 5-10
seconds. Increase the volume control slowly to the
desired output below Clip level.
One separate red LED provided for each channel.
Continuous glow of LEDs indicates that there is
excessive signal being fed to the input of the
amplifier resulting in clipped and distorted output
levels. In such cases, it is advisable to reduce the
input signal or reduce the volume setting.
Otherwise, the amplifier may go into protect mode
and signal will mute.
1 2 3 4
7
56
8
LXA-7600

!Extensive protection circuit for Temperature (transistor and transformer),
Overload, DC, RFI and Output short circuit.
!Output termination on Dual Connectors (Speakon 4-way & Binding Post)
for each channel.
!Low distortion and high damping factor for excellent sound quality.
!Rugged 19" rack mountable chassis.
!Built in limiter circuit, which protects the amplifier and speaker from being
over driven because of high input level signal.
!Balanced / Unbalanced input signal through parallel XLR and 6.3mm (¼")
stereo phone jack in both channels.
!Slide switch selection of Mono / Stereo / Bridge Mode provided on rear
panel.
!Switchable ground lift to break the unwanted ground loops.
!Heavy duty high current toroidal transformer which provides excellent
regulation and minimises hum & noise.
!Indicator LEDs for Signal, Clip, Temperature (output devices and
transformer), Protect mode conditions.
!Low pass filter switchable to 80Hz & 120Hz to use for subwoofer
applications.
!Limiter On/Off switch.
• Features/General Description of Product
4
LXA-7600
• Front Panel Controls & Features
5LXA-7600
1. POWER Switch
To be used only in Stereo/Mono mode for adjusting
the volume level of channel B. This control is
inactive in Bridge mode.
3. Volume Control for Channel A
When used in Stereo/Mono mode, it adjusts the
volume level of channel A. While in Bridge mode, it
adjusts the volume level of both the channels A & B
connected in Bridge mode.
Push the top part of the knob (marked l)to switch the
amplifier ON. Push the bottom part of the knob
(marked o) to switch the amplifier OFF.
5. Temperature Indicator LEDs for Channel A & B
The power switch has in built magnetic circuit
protector. In case of overload, power supply circuit
failure or any short and at overload magnetic circuit
breaker of the switch will activate to trip switch to
OFF position. After rectifying the fault push the top
part switch knob to make amplifier “ON”
Separate yellow LEDs provided for each of the two
channels A & B. Glowing of these LEDs indicates
excessive temperature of the output devices or
transformer. The special circuitry then mutes the
input signals. The amplifier will remain at mute
status, till the devices cool down to normal
temperature. Switch OFF the amplifier to cool down
and then switch ON to continue.
6. Volume Control for Channel B
Indicate the presence of signal in channel A and B
respectively.
8. CLIP Level LEDs for Channel A & B
7. Protect Indicator LEDs for Channel A & B
4. Signal Indicator LEDs for Channel A & B
This LED glows when the amplifier is switched ON.
2. Power LED
Separate orange LED provided for each of the two
channels A & B. These LED’s glow when the output
is shorted or the output is overloaded or the input is
too high or DC voltage is present on the speaker
output. In any of these conditions the amplifier goes
to protect mode. To reset the amplifier, switch OFF
the amplifier, turn volume control to zero, correct
the fault, and switch ON the amplifier after 5-10
seconds. Increase the volume control slowly to the
desired output below Clip level.
One separate red LED provided for each channel.
Continuous glow of LEDs indicates that there is
excessive signal being fed to the input of the
amplifier resulting in clipped and distorted output
levels. In such cases, it is advisable to reduce the
input signal or reduce the volume setting.
Otherwise, the amplifier may go into protect mode
and signal will mute.
1 2 3 4
7
56
8
LXA-7600

6
• Rear Panel Controls & Features
LXA-7600
3
21
+ Sig
- Sig
Shield
3
21
7
• Input - Output Connections
LXA-7600
3 Pin Male XLR
- Signal
+ Signal
Shield (Ground)
Ground
+ Signal
- Signal
Input Connections - Balanced Mode
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Input Connections - Unbalanced Mode
Output Connections - Stereo / Mono Mode
Output Connections - Bridge Mode
3 Pin Male XLR 6.3 mm (¼") Mono Phone Plug
Shield (Ground)
Ground
Speakon Cable
Connector
Output Channel A
Speakon Cable Connector
Output Channel A
Speakon Cable
Connector
Output Channel B
6.3 mm (¼") Stereo Phone Plug
3
21
Signal + Shield
21 3
Speakon Cable Connector
(Inside View)
Speaker
8W
4W
Speakon Cable Connector
(Inside View)
8W
4W
Signal
Signal
9. Fan Grill
Protective grill for channel B fan. Do not insert
anything into this opening.
10. Low Pass Filter Selector Switch for Channel B:
Select the frequencies to 80Hz or 120Hz to use
amplifier to drive sub woofers. When the switch is
OFF, the amplifier will be working for full audio
frequency spectrum.
13. 6.3 mm (¼") Jack Input for Channel B:
19. Fan Grill:
The stereo jack connector accepts the balanced /
unbalanced signals to drive the channel B. Inputs can
be wired as per fig. 1 & 2 (Input Connections for
Balanced and Unbalanced Mode).
24. Binding Post Terminal for Channel A Ouput:
25. Binding Post Terminal for Channel B Output:
This output terminal is parallel to Pin 1+ & 1- of
speakon connector of channel B.
11. Sensitivity Selector Switch:
Ground loop form when multiple sets are used, which
can cause Hum. Using this switch can improve hum &
noise by breaking unwanted ground loops.
Amplified signal is available at Pin 1+ & 1- of speakon
connector. The output speakon connectors should be
wired as per fig. 3 (Output Connectors for Stereo /
Mono Mode). This is not used in Bridge mode.
This F/XLR connector accepts the balanced /
unbalanced signals for driving channel B. Inputs can
be wired as per fig. 1 & 2 (Input Connections for
Balanced and Unbalanced Mode).
This slide switch is used to operate the unit in
stereo, mono or bridge mode.
Select the frequencies to 80Hz or 120Hz to use
amplifier to drive sub woofers. When the switch is
OFF, the amplifier will be working for full audio
frequency spectrum.
Use this cable to supplying power to unit.
Protective grill for channel A fan. Do not insert
anything into this opening.
This F/XLR connector accepts the balanced /
unbalanced signals to drive the channel A in stereo
mode and channel A & B if used in mono and bridge
mode operation. Inputs can be wired as per fig. 1 & 2
(Input Connections for Balanced and Unbalanced
Mode).
Slide switch to select the input sensitivity between
0.775V & 1.23V. It is suggested to use 1.23V
sensitivity if programme signal is fed from a mixer.
15. 6.3 mm (¼") Jack Input for Channel A:
17. LIMITTER ON/OFF Switch:
18. Low Pass Filter Selector Switch for Channel A:
The stereo jack connector accepts the balanced /
unbalanced signals to drive the channel A when used
in stereo mode and channel A & B when used in mono
and bridge mode operation. Inputs can be wired as per
fig. 1 & 2 (Input Connections for Balanced and
Unbalanced Mode).
26. Speakon Connector for Channel B Output
23. Ground Lift Switch:
14. STEREO / MONO / BRIDGE Mode Selector Switch:
This output terminal is parallel to Pin 1+ & 1- of
speakon connector of channel A and may be used
when speakon plugs are not available.
12. F/XLR INPUT Connector for Channel B:
16. F/XLR INPUT Connector for Channel A:
20. 3 Core AC Mains Cable with Plug
Limiter is active when switch is kept at ON position. It
is advised to use the Limiter On in normal operations.
Whenever it is used for limiter OFF, drive the amplifier
for controlled output to protect the speakers from
failure.
21. Earth Terminal: For earthing the chassis.
22. Speakon Connector for Channel A Output:
In STEREO / MONO mode amplified signal is
available at Pin 1+ & 1- of speakon connector. The
output speakon connectors should be wired as per fig.
3 (Output Connectors for Stereo / Mono Mode). In
BRIDGE mode the output is taken from Pin 2+ and 2-
of speakon connector. Output speakon connectors to
be wired as per fig. 4 (Output Connections for Bridge
Mode).
12 13
1110 14 15 16 179 19
18
26 21 2022
25 2324

6
• Rear Panel Controls & Features
LXA-7600
3
21
+ Sig
- Sig
Shield
3
21
7
• Input - Output Connections
LXA-7600
3 Pin Male XLR
- Signal
+ Signal
Shield (Ground)
Ground
+ Signal
- Signal
Input Connections - Balanced Mode
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Input Connections - Unbalanced Mode
Output Connections - Stereo / Mono Mode
Output Connections - Bridge Mode
3 Pin Male XLR 6.3 mm (¼") Mono Phone Plug
Shield (Ground)
Ground
Speakon Cable
Connector
Output Channel A
Speakon Cable Connector
Output Channel A
Speakon Cable
Connector
Output Channel B
6.3 mm (¼") Stereo Phone Plug
3
21
Signal + Shield
21 3
Speakon Cable Connector
(Inside View)
Speaker
8W
4W
Speakon Cable Connector
(Inside View)
8W
4W
Signal
Signal
9. Fan Grill
Protective grill for channel B fan. Do not insert
anything into this opening.
10. Low Pass Filter Selector Switch for Channel B:
Select the frequencies to 80Hz or 120Hz to use
amplifier to drive sub woofers. When the switch is
OFF, the amplifier will be working for full audio
frequency spectrum.
13. 6.3 mm (¼") Jack Input for Channel B:
19. Fan Grill:
The stereo jack connector accepts the balanced /
unbalanced signals to drive the channel B. Inputs can
be wired as per fig. 1 & 2 (Input Connections for
Balanced and Unbalanced Mode).
24. Binding Post Terminal for Channel A Ouput:
25. Binding Post Terminal for Channel B Output:
This output terminal is parallel to Pin 1+ & 1- of
speakon connector of channel B.
11. Sensitivity Selector Switch:
Ground loop form when multiple sets are used, which
can cause Hum. Using this switch can improve hum &
noise by breaking unwanted ground loops.
Amplified signal is available at Pin 1+ & 1- of speakon
connector. The output speakon connectors should be
wired as per fig. 3 (Output Connectors for Stereo /
Mono Mode). This is not used in Bridge mode.
This F/XLR connector accepts the balanced /
unbalanced signals for driving channel B. Inputs can
be wired as per fig. 1 & 2 (Input Connections for
Balanced and Unbalanced Mode).
This slide switch is used to operate the unit in
stereo, mono or bridge mode.
Select the frequencies to 80Hz or 120Hz to use
amplifier to drive sub woofers. When the switch is
OFF, the amplifier will be working for full audio
frequency spectrum.
Use this cable to supplying power to unit.
Protective grill for channel A fan. Do not insert
anything into this opening.
This F/XLR connector accepts the balanced /
unbalanced signals to drive the channel A in stereo
mode and channel A & B if used in mono and bridge
mode operation. Inputs can be wired as per fig. 1 & 2
(Input Connections for Balanced and Unbalanced
Mode).
Slide switch to select the input sensitivity between
0.775V & 1.23V. It is suggested to use 1.23V
sensitivity if programme signal is fed from a mixer.
15. 6.3 mm (¼") Jack Input for Channel A:
17. LIMITTER ON/OFF Switch:
18. Low Pass Filter Selector Switch for Channel A:
The stereo jack connector accepts the balanced /
unbalanced signals to drive the channel A when used
in stereo mode and channel A & B when used in mono
and bridge mode operation. Inputs can be wired as per
fig. 1 & 2 (Input Connections for Balanced and
Unbalanced Mode).
26. Speakon Connector for Channel B Output
23. Ground Lift Switch:
14. STEREO / MONO / BRIDGE Mode Selector Switch:
This output terminal is parallel to Pin 1+ & 1- of
speakon connector of channel A and may be used
when speakon plugs are not available.
12. F/XLR INPUT Connector for Channel B:
16. F/XLR INPUT Connector for Channel A:
20. 3 Core AC Mains Cable with Plug
Limiter is active when switch is kept at ON position. It
is advised to use the Limiter On in normal operations.
Whenever it is used for limiter OFF, drive the amplifier
for controlled output to protect the speakers from
failure.
21. Earth Terminal: For earthing the chassis.
22. Speakon Connector for Channel A Output:
In STEREO / MONO mode amplified signal is
available at Pin 1+ & 1- of speakon connector. The
output speakon connectors should be wired as per fig.
3 (Output Connectors for Stereo / Mono Mode). In
BRIDGE mode the output is taken from Pin 2+ and 2-
of speakon connector. Output speakon connectors to
be wired as per fig. 4 (Output Connections for Bridge
Mode).
12 13
1110 14 15 16 179 19
18
26 21 2022
25 2324

8
• Setup & Operations
LXA-7600
Stereo Mode Configuration
In STEREO mode, both channels A & B are fully independent of each other. The balanced / unbalanced inputs
can be connected either to a stereo signal source or two independent mono signal sources. Each channel can
separately drive loudspeaker loads of 8/4/2 ohms.
+ Adjust the individual volume controls of each
channel on the front panel to obtain the desired
output level.
+ The signal indicator LEDs glow to indicate the
presence of signal at the output terminals.
+Adjust the input signal level below the threshold of
clip LED glow.
+To select STEREO mode, keep the slide switch,
provided at rear panel, in STEREO position.
+ Connect a speaker system on the output terminal of
each channel. It is recommended to use the
speakon connectors and wire these as per fig. 3
(Output Connections for Stereo / Mono Mode).
+ Connect the Left and Right outputs of a mixer to
channel A and B inputs of the amplifier respectively.
Inputs can be wired as per fig. 1 & 2 (Input
Connections for Balanced and Unbalanced Mode).
9
• Setup & Operations…
LXA-7600
+ To select MONO mode, keep the slide switch,
provided at rear panel, in MONO position.
+ Connect a speaker system on the output terminal of
each channel. It is recommended to use the
speakon connectors and wire these as per fig. 3
(Output Connections for Stereo / Mono Mode).
+ Connect the line output of a mixer to channel A
input of the amplifier. Input can be wired as per fig.
1 & 2 (Input Connections for Balanced and
Unbalanced Mode).
+The desired output levels of the A & B channels are
adjustable by individual control of channel A & B
respectively.
+ The signal indicator LEDs glow to indicate the
presence of signal.
+Operate the amplifier below the onset of clip LED
glow. Continuous clip LED glow may push amplifier
into protect mode.
When operating in MONO mode, the signal source should be connected to the balanced / unbalanced input of
channel A only. Both channels provide similar output to their respective loudspeakers. Each channel can
separately drive loudspeaker loads of 8/4/2 ohms.
Multiple
Speaker System (4W)
Multiple
Speaker System (4W)
CH. B Output CH. A Output
CD Player
AMX-1412
PA Mixer
Microphones
R
Play Input
Line Output
L
LXA-7600
Wireless Microphone
CH. B Input CH. A Input
Mono Mode Configuration
CH. A Input
CD Player
PA Mixer
Microphones
Play Input
Line Output
LXA-7600
Multiple
Speaker System (4W)
Multiple
Speaker System (4W)
Wireless Microphone
CH. B Output CH. A Output

8
• Setup & Operations
LXA-7600
Stereo Mode Configuration
In STEREO mode, both channels A & B are fully independent of each other. The balanced / unbalanced inputs
can be connected either to a stereo signal source or two independent mono signal sources. Each channel can
separately drive loudspeaker loads of 8/4/2 ohms.
+ Adjust the individual volume controls of each
channel on the front panel to obtain the desired
output level.
+ The signal indicator LEDs glow to indicate the
presence of signal at the output terminals.
+Adjust the input signal level below the threshold of
clip LED glow.
+To select STEREO mode, keep the slide switch,
provided at rear panel, in STEREO position.
+ Connect a speaker system on the output terminal of
each channel. It is recommended to use the
speakon connectors and wire these as per fig. 3
(Output Connections for Stereo / Mono Mode).
+ Connect the Left and Right outputs of a mixer to
channel A and B inputs of the amplifier respectively.
Inputs can be wired as per fig. 1 & 2 (Input
Connections for Balanced and Unbalanced Mode).
9
• Setup & Operations…
LXA-7600
+ To select MONO mode, keep the slide switch,
provided at rear panel, in MONO position.
+ Connect a speaker system on the output terminal of
each channel. It is recommended to use the
speakon connectors and wire these as per fig. 3
(Output Connections for Stereo / Mono Mode).
+ Connect the line output of a mixer to channel A
input of the amplifier. Input can be wired as per fig.
1 & 2 (Input Connections for Balanced and
Unbalanced Mode).
+The desired output levels of the A & B channels are
adjustable by individual control of channel A & B
respectively.
+ The signal indicator LEDs glow to indicate the
presence of signal.
+Operate the amplifier below the onset of clip LED
glow. Continuous clip LED glow may push amplifier
into protect mode.
When operating in MONO mode, the signal source should be connected to the balanced / unbalanced input of
channel A only. Both channels provide similar output to their respective loudspeakers. Each channel can
separately drive loudspeaker loads of 8/4/2 ohms.
Multiple
Speaker System (4W)
Multiple
Speaker System (4W)
CH. B Output CH. A Output
CD Player
AMX-1412
PA Mixer
Microphones
R
Play Input
Line Output
L
LXA-7600
Wireless Microphone
CH. B Input CH. A Input
Mono Mode Configuration
CH. A Input
CD Player
PA Mixer
Microphones
Play Input
Line Output
LXA-7600
Multiple
Speaker System (4W)
Multiple
Speaker System (4W)
Wireless Microphone
CH. B Output CH. A Output

10
LXA-7600
• Setup & Operations…
Tips for Safe Operation
+ Do not operate the amplifier with continuously glowing
CLIP LED. The respective volume control of the
channels must be adjusted so that the output level
does not clip and distort.
+ Ensure proper impedance matching. For continuous
safe operation, resultant impedance of the speakers
is recommended as 8 ohm in bridge mode and 4 or 8
ohms in mono/stereo modes.
+All connections must only be carried out or changed
with the amplifier switched OFF & the AC mains supply
disconnected.
+The amplifier must be connected to an AC earthed
mains outlet that can deliver the maximum power
required. The use of extension cables or adaptors
should be avoided as this can jeopardize correct
current delivery to the amplifier.
+ For 4 ohm applications, it is recommended to use
speakon connectors only.
+ The level of input signal should not exceed the
specified input sensitivities. Excessive input signal
levels result in over driving of input circuit which leads
to saturated / distorted output at speaker terminals.
+ Use of cable 40 / 36 or thicker is recommended to
prevent power losses in speaker cables.
+ Do not obstruct the front or rear of the amplifier for
necessary intake of air. This is a fan cooled amplifier.
LXA-7600
• Typical Applications
Stereo Mix Plus Subwoofers (LXA-3200 with LXA-7600)
11
+Connect the Left and Right High frequency output
of the active crossover to the respective input
channels A & B of amplifier 1 (LXA-3200). Inputs
can be wired as per fig. 1 & 2 (Input Connections
for Balanced and Unbalanced Mode).
+One number of full range loudspeaker system
SPX-1200 can be connected to each of the output
channels of amplifier 1. The output speakon
connectors should be wired as per fig. 3 (Output
Connections for Stereo / Mono Mode).
+One no. each of high power subwoofer system
SWX-2600 can be connected to the channel
A & B outputs of amplifiers 2 respectively. Output
speakon connectors to be wired as per fig. 4
(Output Connections for Stereo Mode).
+Amplifier 2 will be used in stereo mode. Keep the
slide switch of amplifier 2 STEREO position to
activate stereo mode.
+ Connect the Left and Right outputs of the Audio
mixing console to the respective inputs of the
Active Crossover.
+Amplifier 1 will be used in stereo mode. Keep the
slide switch of amplifier 1 in stereo position.
+Finally adjust the volume control of channel A & B
in amplifier 1 (LXA-3200) to control the level of
their respective SPX-1200.
+Also, adjust the volume control of channel A & B in
amplifier 2 (LXA-7600) to control the levels of their
respective SWX-2600.
+Operate the amplifier in such a way the clip LED
should not blink continuously.
+Continuously clip LED glow may bring amplifier
into protect mode.
+The speakon is the preferred choice for
connections, but if the output connections are to
be made on binding posts for stereo mode
applications, then (+) of the speaker should be
wired on (+) (Red) terminal of channel A output
and (-) of the speaker should be wired on (-)
(Black) terminal of the channel A output.
+Feed the left Low frequency output signal of the
crossover to the channel A input of amplifier 2
(LXA-7600). Similarly feed the Right Low
frequency output signal of the crossover to the
channel B input of amplifier 2 (LXA-7600). Inputs
can be wired as per fig. 1 & 2 (Input Connections
for Balanced and Unbalanced Mode).
Amplfiier 1 LXA-3200 (Stereo Mode)
CH. B Input CH. A Input
CH. B Output CH. A Output
Amplfiier 2 LXA-7600 (Stereo Mode)
CH. B Input
AMX-1412
PA Mixer
Microphones
R
Line Output
L
Wireless Microphone
L
L
R
R
Input
Lo Output
STEREO
ACTIVE CROSSOVER
Hi Output
Stereo Keyboard
Headphone
SPX-1200
(4W)
SPX-1200
(4W)
CH. A Output
CH. A Input
CH. B Output
SWX-2600
(4W)
SWX-2600
(4W)
L
R
Bridge Mode Configuration
+Operate the amplifier below the clip LED glow.
+ The signal indicator LEDs glow to indicate the
presence of signal at the output terminals.
+To select bridge mode, keep the slide switch,
provided at rear, in BRIDGE position.
+The desired output levels of both the channels are
adjustable by volume control of channel A only.
+ Connect a speaker system (not below 4 ohm) on
the speakon output of channel A only. It is
recommended to use the speakon connectors and
wire these as per fig. 4 (Output Connections for
Bridge Mode).
+If however binding posts are to be used for bridge
mode then connect the positive (+) of the
loudspeaker to the positive (+) (Red) terminal of
binding posts for channel A and the negative (-) of
the loudspeaker to the positive (+) Red terminal of
Binding Post of channel B.
+ Connect the line output of a mixer to channel A
input of the amplifier. Input can be wired as per fig.
1 & 2 (Input Connections for Balanced and
Unbalanced Mode).
For BRIDGE mode operation, the signal source should be connected to the balanced / unbalanced input of
channel A only. This mode provides the combined power output of both channels for connecting a single
loudspeaker load. The recommended combined loudspeaker load should be 8 ohm.
CD Player
PA Mixer
Microphones
Play Input
Line Output
LXA-7600 CH. A Input
Multiple
Speaker System
(imp.8 ohm)
Wireless Microphone
CH. A Output

10
LXA-7600
• Setup & Operations…
Tips for Safe Operation
+ Do not operate the amplifier with continuously glowing
CLIP LED. The respective volume control of the
channels must be adjusted so that the output level
does not clip and distort.
+ Ensure proper impedance matching. For continuous
safe operation, resultant impedance of the speakers
is recommended as 8 ohm in bridge mode and 4 or 8
ohms in mono/stereo modes.
+All connections must only be carried out or changed
with the amplifier switched OFF & the AC mains supply
disconnected.
+The amplifier must be connected to an AC earthed
mains outlet that can deliver the maximum power
required. The use of extension cables or adaptors
should be avoided as this can jeopardize correct
current delivery to the amplifier.
+ For 4 ohm applications, it is recommended to use
speakon connectors only.
+ The level of input signal should not exceed the
specified input sensitivities. Excessive input signal
levels result in over driving of input circuit which leads
to saturated / distorted output at speaker terminals.
+ Use of cable 40 / 36 or thicker is recommended to
prevent power losses in speaker cables.
+ Do not obstruct the front or rear of the amplifier for
necessary intake of air. This is a fan cooled amplifier.
LXA-7600
• Typical Applications
Stereo Mix Plus Subwoofers (LXA-3200 with LXA-7600)
11
+Connect the Left and Right High frequency output
of the active crossover to the respective input
channels A & B of amplifier 1 (LXA-3200). Inputs
can be wired as per fig. 1 & 2 (Input Connections
for Balanced and Unbalanced Mode).
+One number of full range loudspeaker system
SPX-1200 can be connected to each of the output
channels of amplifier 1. The output speakon
connectors should be wired as per fig. 3 (Output
Connections for Stereo / Mono Mode).
+One no. each of high power subwoofer system
SWX-2600 can be connected to the channel
A & B outputs of amplifiers 2 respectively. Output
speakon connectors to be wired as per fig. 4
(Output Connections for Stereo Mode).
+Amplifier 2 will be used in stereo mode. Keep the
slide switch of amplifier 2 STEREO position to
activate stereo mode.
+ Connect the Left and Right outputs of the Audio
mixing console to the respective inputs of the
Active Crossover.
+Amplifier 1 will be used in stereo mode. Keep the
slide switch of amplifier 1 in stereo position.
+Finally adjust the volume control of channel A & B
in amplifier 1 (LXA-3200) to control the level of
their respective SPX-1200.
+Also, adjust the volume control of channel A & B in
amplifier 2 (LXA-7600) to control the levels of their
respective SWX-2600.
+Operate the amplifier in such a way the clip LED
should not blink continuously.
+Continuously clip LED glow may bring amplifier
into protect mode.
+The speakon is the preferred choice for
connections, but if the output connections are to
be made on binding posts for stereo mode
applications, then (+) of the speaker should be
wired on (+) (Red) terminal of channel A output
and (-) of the speaker should be wired on (-)
(Black) terminal of the channel A output.
+Feed the left Low frequency output signal of the
crossover to the channel A input of amplifier 2
(LXA-7600). Similarly feed the Right Low
frequency output signal of the crossover to the
channel B input of amplifier 2 (LXA-7600). Inputs
can be wired as per fig. 1 & 2 (Input Connections
for Balanced and Unbalanced Mode).
Amplfiier 1 LXA-3200 (Stereo Mode)
CH. B Input CH. A Input
CH. B Output CH. A Output
Amplfiier 2 LXA-7600 (Stereo Mode)
CH. B Input
AMX-1412
PA Mixer
Microphones
R
Line Output
L
Wireless Microphone
L
L
R
R
Input
Lo Output
STEREO
ACTIVE CROSSOVER
Hi Output
Stereo Keyboard
Headphone
SPX-1200
(4W)
SPX-1200
(4W)
CH. A Output
CH. A Input
CH. B Output
SWX-2600
(4W)
SWX-2600
(4W)
L
R
Bridge Mode Configuration
+Operate the amplifier below the clip LED glow.
+ The signal indicator LEDs glow to indicate the
presence of signal at the output terminals.
+To select bridge mode, keep the slide switch,
provided at rear, in BRIDGE position.
+The desired output levels of both the channels are
adjustable by volume control of channel A only.
+ Connect a speaker system (not below 4 ohm) on
the speakon output of channel A only. It is
recommended to use the speakon connectors and
wire these as per fig. 4 (Output Connections for
Bridge Mode).
+If however binding posts are to be used for bridge
mode then connect the positive (+) of the
loudspeaker to the positive (+) (Red) terminal of
binding posts for channel A and the negative (-) of
the loudspeaker to the positive (+) Red terminal of
Binding Post of channel B.
+ Connect the line output of a mixer to channel A
input of the amplifier. Input can be wired as per fig.
1 & 2 (Input Connections for Balanced and
Unbalanced Mode).
For BRIDGE mode operation, the signal source should be connected to the balanced / unbalanced input of
channel A only. This mode provides the combined power output of both channels for connecting a single
loudspeaker load. The recommended combined loudspeaker load should be 8 ohm.
CD Player
PA Mixer
Microphones
Play Input
Line Output
LXA-7600 CH. A Input
Multiple
Speaker System
(imp.8 ohm)
Wireless Microphone
CH. A Output

• Protections & Installations
Incase of excessive heating of the output devices or
transformer, the thermal protection circuits will
bring the audio signal to mute status. Onset of
thermal protection circuit is indicated by glowing of
TEMP LEDs (yellow) in each channel. To restore
normal operating conditions, it is recommended to
switch off the amplifier for cooling and then switch
ON again after cooling and checking the speaker
connections.
Inbuilt circuits are provided to protect the
loudspeakers from any offset DC voltages. Also
suppression filters at primary and secondary power
supplies have been inbuilt, to reduce some RF
interference.
a. 1 × 20A Magnetic Circuit breaker for AC mains.
Output Devices/Transformer
Overload / Short Circuit Protection
Fuses/CIRCUIT PROTECTOR
c. 2 × 3A (T 3A L) fuses for ±14.5V regulated
power supplies.
Thermal Protections
DC, RFI Protection
Protection circuit is provided in both channels for
the safety of output devices in case of overload or
mismatch of impedances at the outputs. This circuit
brings the input signals to mute condition, and set
will be in protect mode. To reset, switch OFF the
amplifier for few seconds, remove the short circuit
or overload and than switch ON for normal
operation.
b. 1 × 30A (T 30A L) fuses for each channel
• Typical Applications…
12
LXA-7600
Stereo Line Array Applications
+Connect the Right output of the Audio mixing
console to the channel A input of Amplifier-3 (LXA-
6000).
+Connect the 6.3mm jack input of channel A in
Amplifier-1 (LXA-6000) to the XLR input channel A
of Amplifier-2 (LXA-7600).
+The inputs can be wired as per fig. 1 & 2 (Input
connections for Balanced and Unbalanced Mode).
+For connecting 4 nos. of Line Array cabinets,
connect nos. in parallel on outputs A 2 and connect
another A2 nos. in parallel on output B of mplifier-1
(LXA-6000). The resultant impedance of each group
of ine rrays is 4 o .two L A hm
+Connect SWX-2600 on each channel output A & B of
Amplifier-2 (LXA-7600).
+Switch the Stereo/Mono/Bridge switch of each
Amplifier-1 and 2 to Mono mode.
+For Amplifier-1, (LXA-6000) keep the Low Pass filter
switch in OFF position. For Amplifer-2 keep the Low
Pass filter switch in either 80 Hz or 120 Hz positions.
+This installation of two Subwoofers SWX-2600 and
four Line Arrays connected to 1 x LXA-7600 &
1 x 6000 respectively, is LEFT STACK of Line Array.
+Connect the 6.3mm jack input of channel A in
Amplifier-3 (LXA-6000) to the XLR input channel A
of Amplifier-4 (LXA-7600).
+(Input The inputs can be wired as per fig. 1 & 2
connections for Balanced and Unbalanced Mode).
+For connecting 4 nos. of Line Array cabinets,
connect nos. in parallel on outputs A and connect 2
another 2 nos. in parallel on output B of Amplifier-3
(LXA-6000). The resultant impedance of each group
of two Line Arrays is 4 o .hm
+Connect SWX-2600 on each channel output A & B of
Amplifier-4 (LXA-7600).
+For Amplifier-3 (LXA-6000), keep the Low Pass filter
switch in OFF position. For Amplifer-4 (LXA-7600)
keep the Low Pass filter switch in either 80 Hz or 120
Hz positions.
+Connect the Left output of the Audio mixing console
to the channel A input of Amplifier-1 (LXA-6000).
+Any adjustments in the tonal quality of the sound,
if required, can be made from the audio mixing
console.
+Switch the Stereo/Mono/Bridge switch of each
Amplifier-3 and 4 to Mono mode.
+Finally adjustment of output levels will be by their
respectively volume controls of each channel of
Amplifier-1, 2, 3 and 4.
+Operate each Amplifier below the threshold of clip
LED glow.
+This installation of two Subwoofers SWX-2600 and
four Line Arrays connected to 1 x LXA-7600 &
1 x LXA-6000 respectively, is RIGHT STACK of Line
Array.
13 LXA-7600
AMX-1412
PA Mixer
Microphones
R
Line Output
L
Play Input
CD Player
Wireless Microphone
SWX-2600 (4W)
• Typical Applications
SWX-2600 (4W)
SWX-2600 (4W)
LEFT STACK
SWX-2600 (4W)
RIGHT STACK
Line Array
(2 Arrays in Parallel)
4W
(2 Arrays in Parallel)
4W
Line Array
(2 Arrays in Parallel)
4W
(2 Arrays in Parallel)
4W
L R
Amplifier-1
LXA-6000 (Mono Mode)
Amplifier-2
LXA-7600 (Mono Mode)
Amplifier-3
LXA-6000 (Mono Mode)
Amplifier-4
LXA-7600 (Mono Mode)
CH. A Input
CH. A Input
CH. A Input
CH. A Input
CH. A Output
CH. A Output
CH. A Output
CH. A Output
CH. B Output
CH. B Output
CH. B Output
CH. B Output

• Protections & Installations
Incase of excessive heating of the output devices or
transformer, the thermal protection circuits will
bring the audio signal to mute status. Onset of
thermal protection circuit is indicated by glowing of
TEMP LEDs (yellow) in each channel. To restore
normal operating conditions, it is recommended to
switch off the amplifier for cooling and then switch
ON again after cooling and checking the speaker
connections.
Inbuilt circuits are provided to protect the
loudspeakers from any offset DC voltages. Also
suppression filters at primary and secondary power
supplies have been inbuilt, to reduce some RF
interference.
a. 1 × 20A Magnetic Circuit breaker for AC mains.
Output Devices/Transformer
Overload / Short Circuit Protection
Fuses/CIRCUIT PROTECTOR
c. 2 × 3A (T 3A L) fuses for ±14.5V regulated
power supplies.
Thermal Protections
DC, RFI Protection
Protection circuit is provided in both channels for
the safety of output devices in case of overload or
mismatch of impedances at the outputs. This circuit
brings the input signals to mute condition, and set
will be in protect mode. To reset, switch OFF the
amplifier for few seconds, remove the short circuit
or overload and than switch ON for normal
operation.
b. 1 × 30A (T 30A L) fuses for each channel
• Typical Applications…
12
LXA-7600
Stereo Line Array Applications
+Connect the Right output of the Audio mixing
console to the channel A input of Amplifier-3 (LXA-
6000).
+Connect the 6.3mm jack input of channel A in
Amplifier-1 (LXA-6000) to the XLR input channel A
of Amplifier-2 (LXA-7600).
+The inputs can be wired as per fig. 1 & 2 (Input
connections for Balanced and Unbalanced Mode).
+For connecting 4 nos. of Line Array cabinets,
connect nos. in parallel on outputs A 2 and connect
another A2 nos. in parallel on output B of mplifier-1
(LXA-6000). The resultant impedance of each group
of ine rrays is 4 o .two L A hm
+Connect SWX-2600 on each channel output A & B of
Amplifier-2 (LXA-7600).
+Switch the Stereo/Mono/Bridge switch of each
Amplifier-1 and 2 to Mono mode.
+For Amplifier-1, (LXA-6000) keep the Low Pass filter
switch in OFF position. For Amplifer-2 keep the Low
Pass filter switch in either 80 Hz or 120 Hz positions.
+This installation of two Subwoofers SWX-2600 and
four Line Arrays connected to 1 x LXA-7600 &
1 x 6000 respectively, is LEFT STACK of Line Array.
+Connect the 6.3mm jack input of channel A in
Amplifier-3 (LXA-6000) to the XLR input channel A
of Amplifier-4 (LXA-7600).
+(Input The inputs can be wired as per fig. 1 & 2
connections for Balanced and Unbalanced Mode).
+For connecting 4 nos. of Line Array cabinets,
connect nos. in parallel on outputs A and connect 2
another 2 nos. in parallel on output B of Amplifier-3
(LXA-6000). The resultant impedance of each group
of two Line Arrays is 4 o .hm
+Connect SWX-2600 on each channel output A & B of
Amplifier-4 (LXA-7600).
+For Amplifier-3 (LXA-6000), keep the Low Pass filter
switch in OFF position. For Amplifer-4 (LXA-7600)
keep the Low Pass filter switch in either 80 Hz or 120
Hz positions.
+Connect the Left output of the Audio mixing console
to the channel A input of Amplifier-1 (LXA-6000).
+Any adjustments in the tonal quality of the sound,
if required, can be made from the audio mixing
console.
+Switch the Stereo/Mono/Bridge switch of each
Amplifier-3 and 4 to Mono mode.
+Finally adjustment of output levels will be by their
respectively volume controls of each channel of
Amplifier-1, 2, 3 and 4.
+Operate each Amplifier below the threshold of clip
LED glow.
+This installation of two Subwoofers SWX-2600 and
four Line Arrays connected to 1 x LXA-7600 &
1 x LXA-6000 respectively, is RIGHT STACK of Line
Array.
13 LXA-7600
AMX-1412
PA Mixer
Microphones
R
Line Output
L
Play Input
CD Player
Wireless Microphone
SWX-2600 (4W)
• Typical Applications
SWX-2600 (4W)
SWX-2600 (4W)
LEFT STACK
SWX-2600 (4W)
RIGHT STACK
Line Array
(2 Arrays in Parallel)
4W
(2 Arrays in Parallel)
4W
Line Array
(2 Arrays in Parallel)
4W
(2 Arrays in Parallel)
4W
L R
Amplifier-1
LXA-6000 (Mono Mode)
Amplifier-2
LXA-7600 (Mono Mode)
Amplifier-3
LXA-6000 (Mono Mode)
Amplifier-4
LXA-7600 (Mono Mode)
CH. A Input
CH. A Input
CH. A Input
CH. A Input
CH. A Output
CH. A Output
CH. A Output
CH. A Output
CH. B Output
CH. B Output
CH. B Output
CH. B Output

Possible Reason:
+Amplifier has gone to protect mode due to high signal level, high temperature or
output short or overloading.
+Check the level of signal from input source. If it is high then reduce the input signal
level and than switch ON the amplifier and increase volume slowly.
+The amplifier should never be operated at a level which causes the clip LEDs to
illuminate continuously. It will give distorted sound.
+Also check the impedance of speakers, shorting of speaker connections if any.
Rectify the fault and then switch ON the amplifier for normal operation.
14
LXA-7600 15 LXA-7600
• Trouble Shooting…
ON
Possible Reason:
+Check if the level of the input signal is too low.
+Check the signal source is operating and the input cable is intact.
+The channel volume control setting is too low.
Indication:
Possible Reason:
+To restore normal operation, turn down the volume control, switch OFF the set for few
seconds, remove the fault if any and switch ON again. Increase the volume control
slowly for the desired output.
+The amplifier may be in mute mode due to speaker impedance mismatch or output
short circuit.
+Check the speaker impedance and speaker wiring for stray strands or breaks in the
insulation.
Indication:
CLIP
PROTECT
SIGNAL
TEMP
ON CLIP
PROTECT
SIGNAL
TEMP
+Check if the fan is working, proper ventilation is provided and output connections are
as recommended, remove the fault if any.
+Switch off the amplifier to cool down.
Possible Reason:
+This could be due to wrong speakon connections or faulty speakers.
+The amplifier may be in mute mode due to output short circuit, overloading or poor
ventilation resulting in the rise in temperature either of output devices or power
transformer as indicated by respective LEDs to unsafe region.
+Check the output speakon connections as per fig. 3 ot 4 on page no. 7 (Output
Connections for Stereo, Mono or Bridge Mode).
+To restore normal operation, turn down the volume control, than switch ON the set
and increase the volume control for desired output.
Indication:
Condition: No Sound
Indication:
ON CLIP
PROTECT
SIGNAL
TEMP
ON CLIP
PROTECT
SIGNAL
TEMP
+The amplifier is in normal operation (When signal is fed).
Possible Reason:
GLOWING BLINKING OFF
Key to LED symbols:
Indication:
Condition: Normal operation
+The amplifier may not be plugged into the power receptacle.
+Confirm that the AC outlet works by plugging in another device. If too many amplifiers
are used on one outlet, the building's circuit breaker may trip and shut off power.
+An amplifier which keeps shutting off may have a serious internal fault. Turn it off,
remove AC power cord and get the amplifier serviced by a qualified technician.
Possible Reason:
+The amplifier power switch may be off.
+An overload may cause tripping of main switch on front pannel.
Indication:
Condition: No power to the amplifier
• Trouble Shooting
ON CLIP
PROTECT
SIGNAL
TEMP
ON CLIP
PROTECT
SIGNAL
TEMP
+ The installed amplifier, should be well supported by
the side support channels as well as rigidly fixed
on to the rack through the two rack mount side
brackets duly fitted with 'U' type handles, as shown
in the figure below:
+ In order to provide sufficient support base to the
heavy amplifier, it is essential to use the 19" rack
system with side support channels.
+ The amplifier is designed for use in a standard
19"rack with height of 3U units.
+ The 'U' handles are helpful in easy portability of the
amplifier for table top usage. Do not keep the set
on an unstable stand or tripod.
19" Rack Installation Table Top Usage
Condition: Low output
Condition: No Sound
Condition: NO Sound
LXA-7600
Side Support Channel
LXA-7600

Possible Reason:
+Amplifier has gone to protect mode due to high signal level, high temperature or
output short or overloading.
+Check the level of signal from input source. If it is high then reduce the input signal
level and than switch ON the amplifier and increase volume slowly.
+The amplifier should never be operated at a level which causes the clip LEDs to
illuminate continuously. It will give distorted sound.
+Also check the impedance of speakers, shorting of speaker connections if any.
Rectify the fault and then switch ON the amplifier for normal operation.
14
LXA-7600 15 LXA-7600
• Trouble Shooting…
ON
Possible Reason:
+Check if the level of the input signal is too low.
+Check the signal source is operating and the input cable is intact.
+The channel volume control setting is too low.
Indication:
Possible Reason:
+To restore normal operation, turn down the volume control, switch OFF the set for few
seconds, remove the fault if any and switch ON again. Increase the volume control
slowly for the desired output.
+The amplifier may be in mute mode due to speaker impedance mismatch or output
short circuit.
+Check the speaker impedance and speaker wiring for stray strands or breaks in the
insulation.
Indication:
CLIP
PROTECT
SIGNAL
TEMP
ON CLIP
PROTECT
SIGNAL
TEMP
+Check if the fan is working, proper ventilation is provided and output connections are
as recommended, remove the fault if any.
+Switch off the amplifier to cool down.
Possible Reason:
+This could be due to wrong speakon connections or faulty speakers.
+The amplifier may be in mute mode due to output short circuit, overloading or poor
ventilation resulting in the rise in temperature either of output devices or power
transformer as indicated by respective LEDs to unsafe region.
+Check the output speakon connections as per fig. 3 ot 4 on page no. 7 (Output
Connections for Stereo, Mono or Bridge Mode).
+To restore normal operation, turn down the volume control, than switch ON the set
and increase the volume control for desired output.
Indication:
Condition: No Sound
Indication:
ON CLIP
PROTECT
SIGNAL
TEMP
ON CLIP
PROTECT
SIGNAL
TEMP
+The amplifier is in normal operation (When signal is fed).
Possible Reason:
GLOWING BLINKING OFF
Key to LED symbols:
Indication:
Condition: Normal operation
+The amplifier may not be plugged into the power receptacle.
+Confirm that the AC outlet works by plugging in another device. If too many amplifiers
are used on one outlet, the building's circuit breaker may trip and shut off power.
+An amplifier which keeps shutting off may have a serious internal fault. Turn it off,
remove AC power cord and get the amplifier serviced by a qualified technician.
Possible Reason:
+The amplifier power switch may be off.
+An overload may cause tripping of main switch on front pannel.
Indication:
Condition: No power to the amplifier
• Trouble Shooting
ON CLIP
PROTECT
SIGNAL
TEMP
ON CLIP
PROTECT
SIGNAL
TEMP
+ The installed amplifier, should be well supported by
the side support channels as well as rigidly fixed
on to the rack through the two rack mount side
brackets duly fitted with 'U' type handles, as shown
in the figure below:
+ In order to provide sufficient support base to the
heavy amplifier, it is essential to use the 19" rack
system with side support channels.
+ The amplifier is designed for use in a standard
19"rack with height of 3U units.
+ The 'U' handles are helpful in easy portability of the
amplifier for table top usage. Do not keep the set
on an unstable stand or tripod.
19" Rack Installation Table Top Usage
Condition: Low output
Condition: No Sound
Condition: NO Sound
LXA-7600
Side Support Channel
LXA-7600

• Specifications
Channel Separation 65dB at 1kHz
Bridged Output 8 5200W
Input Impedance 10k Unbalanced, 20k Balanced
Built-in Limiter with ON/OFF
Model LXA-7600
Continuous Rated Power
Stereo/Mono 8 2 × 1600W
4 2 × 2600W
2 2 × 3800W
THD + N 1.0%
Frequency Response (-1dB) 20-20,000Hz
4 7600W
S / N Ratio 95dB
Input Sensitivity 0dBm (775mV), 4dBm (1.23V)
LPF 80Hz/120Hz, 24dB per octave
Power Bandwidth (0.5% THD) 20-20,000Hz
Damping Factor 400 : 1 (8 )
Slew Rate 35V/ s
Protections Temperature, DC, RFI, Short Circuit, Overload,
DC: Fuse 1 x 30Amp. (T 30A L) for each channel, Fuse 2×3 Amp. (T 3A L)
Input Connectors 2 × F/XLR, Stereo Phone Jack 6.3mm
Output Connectors Speakon 4-Way and heavy duty Binding Post for each channel
Dimensions W482 × H153 × D605mm
Indicators ON, Signal, Clip, Temperature, Protect (Ch. A & B)
Cooling 2 x Fixed speed DC fan and 2 x Variable Speed DC Fan with
Power Consumption (Rated) 9000VA @ 220-240V 50/60Hz
Temperature Sensing
Weight 39.50kg approx.
AC: Magnetic Circuit Breaker 20A
Front Panel Controls 2 × 41 step level Attenuators
AHUJA RADIOS • 215, Okhla Industrial Estate, New Delhi - 110 020, INDIA
Tel.: [phone] Fax : [phone]
E-mail: [email protected], [email protected]
Website: www.ahujaradios.com
l is a registered trademark of Ahuja Radios in India and other countries.
l No part of this compilation may be reproduced in any manner or translated without
written permission.
l Design and Specifications are subject to change without notice owing to continuous
product up-gradation
l Technical specifications are subject to production tolerances.
l We cannot be held responsible for printing errors, should they occur.
l © Copyright Ahuja Radios, 2020. All rights reserved. Any unauthorized reproduction or
use of logos, images or design elements is strictly prohibited by law.
E. & O. E. 0K/00/20
®