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