Invotone IHA4PRO User manual

4-CHANNEL HEADPHONE AMPLIFIER
IHA4PRO
USER'S MANUAL
INPUT LEVEL(dBu)
INPUT GAIN
3
24
5
6
1
0
0CLIP
18 12 66 1812
DIRECT IN
CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUT GAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 66 18
CHANNEL 1
MAIN SECTION CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUT GAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 66 18
CHANNEL 2 CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUT GAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 66 18
CHANNEL 3 CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUT GAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 66 18
CHANNEL 4
4-CHANNEL
HEADPHONE
AMPLIFIER
POWER
OFF
ON
IHA4PRO
NF03827-1.0

CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
IMPORTANT SAFETY INSTRUCTION
TO REDUCE THE RISK OF ELECTRIC SHOCK
PLEASE DO NOT REMOVE THE COVER OR
THE BACK PANEL OF THIS EQUIPMENT.
THERE ARE NO PARTS NEEDED BY USER
INSIDE THE EQUIPMENT. FOR SERVICE,
PLEASE CONTACT QUALIFIED SERVICE
CENTERS.
WARNING
To reduce the risk of electric shock
and fire, do not expose this equipment
to moisture or rain.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Dispose of this product should
not be placed in municipal waste
and should be separate collection.
11.
12.
Move this Equipment only with a cart,
stand, tripod, or bracket,
specified by the
manufacturer, or
sold with the
Equipment. When
a cart is used, use
caution when
moving the cart /
equipment
combination to
avoid possible
injury from tip-over.
Permanent hearing loss may be caused by
exposure to \ extremely high noise levels.
The US. Government's Occupational Safety
and Health Administration (OSHA) has
specified the permissible exposure to noise
level.
These are shown in the following chart:
HOURS X DAY SPL EXAMPLE
According to OSHA, an exposure to high SPL in
excess of these limits may result in the loss of
heat. To avoid the potential damage of heat, it is
recommended that Personnel exposed to
equipment capable of generating high SPL use
hearing protection while such equipment is
under operation.
8
6
4
3
2
1,5
1
0,5
0,25 or less
90
92
95
97
100
102
105
110
115
train
Subway train
High level desktop monitors
Classic music concert
Rock concert
Small gig
This symbol, wherever used, alerts you to the
presence of un-insulated and dangerous voltages
within the product enclosure. These are voltages that
may be sufficient to constitute the risk of electric
shock or death.
This symbol, wherever used, alerts you to
important operating and maintenance instructions.
Please read.
Protective Ground Terminal
AC mains (Alternating Current)
Hazardous Live Terminal
ON: Denotes the product is turned on.
OFF: Denotes the product is turned off.
The apparatus shall be connected to a mains
socket outlet with a protective earthing
connection.
The mains plug or an appliance coupler is used
as the disconnect device, the disconnect device
shall remain readily operable.
CAUTION
Describes precautions that should be observed to
prevent damage to the product.
Read this Manual carefully before operation.
Keep this Manual in a safe place.
Be aware of all warnings reported
with this symbol.
Keep this Equipment away from water and
moisture.
Clean it only with dry cloth. Do not use
solvent or other chemicals.
Do not damp or cover any cooling opening.
Install the equipment only in accordance with
the Manufacturer's instructions.
Power Cords are designed for your safety. Do
not remove Ground connections! If the plug
does not fit your AC outlet, seek advice from
a qualified electrician. Protect the power
cord and plug from any physical stress to
avoid risk of electric shock. Do not place
heavy objects on the power cord. This could
cause electric shock or fire.
Unplug this equipment when unused for long
periods of time or during a storm.
Refer all service to qualified service personnel
only. Do not perform any servicing other than
those instructions contained within the
User's Manual.
To prevent fire and damage to the product,
use only the recommended fuse type as
indicated in this manual. Do not short-circuit
the fuse holder. Before replacing the fuse,
make sure that the product is OFF and
disconnected from the AC outlet.

1
IN THIS MANUAL
1. INTRODUCTION
Thank you for 4-channel headphone amplifier.
Your IHA4PRO has been designed for applications such as recording, broadcast and
Live events. It is a very flexible tool allowing personal headphone mix for up to four
musicians.
purchasing INVOTONE IHA4PRO
Enjoy your IHA4PRO and read this Manual carefully before operation!
2. FEATURES
-
- 4 individual headphone channels
- Input gain control, and individual output gain control
- Up to 3 headphone outputs per channel for a total of 12 headphones
-M
- Direct In and Headphone Output on the front panel for easy operation, when
mounted in a rack
- Input and Output
- Balance Control to mix the Main In and the Aux In signal
- Main Outputs for linking additional IHA4PRO headphone amplifiers
- High-end quality even at high volume levels
-
- Exceptionally rugged construction ensures long life and durability
- Universal and professional headphone amplification system for studio and stage
application
- Manufactured under QS9000 certified quality system
1 rack space unit
inimum output impedance: 8 ohm
LED level meter
TREBLE and BASS controls for each channel
1. INTRODUCTION.....................................................................................................1
2. FEATURES..............................................................................................................1
3. CONTROL ELEMENTS..........................................................................................2
4. APPLICATIONS.......................................................................................................5
5. INSTALLATION AND CONNECTION....................................................................7
6. TECHNICAL SPECIFACATION.............................................................................9
INPUT LEVEL(dBu)
INPUT GAIN
3
24
5
6
1
0
0CLIP
18 12 66 1812
DIRECT IN
CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUT GAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 66 18
CHANNEL 1
MAIN SECTION CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUT GAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 66 18
CHANNEL 2 CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUT GAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 66 18
CHANNEL 3 CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUT GAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 66 18
CHANNEL 4
4-CHANNEL
HEADPHONE
AMPLIFIER
POWER
OFF
ON
IHA4PRO

6. TECHNICAL SPECIFICATION
AUDIO INPUT
Main Input
Connectors
Type
Impedance
Max.input level
CMRR
XLR and 1/4" jack
HF filtered, servo balanced input
40 kOhms balanced, 20 kOhms unbalanced
+21 dBu balanced and unbalanced
typ.40 dB, >55 dB @ 1kHz
AUX IN and DIRECT IN input
Connectors
Type
Impedance
Max.input level
CMRR
1/4" TRS (tip=left, ring=right, sleeve=ground)
Unbalanced
>15 kOhms Unbalanced
+21 dBu unbalanced
typ,40 dB, >55 dB@1kHz
AUDIO OUTPUT
Connectors
Type
Impedance
Max. output level
XLR and 1/4" Jack
Balanced /Unbalanced
Dependent on the input impedance
+21 dBu Balanced and Unbalanced
SYSTEM SPECIFICATIONS
Frequency response
Noise
THD
10 Hz to 50 kHz,+/-3 dB
>90 dB, Unweighted, 22 Hz to 22 kHz(>95 dB@+4 dBu)
0.005% typ.@+4 dBu, 1kHz, Gain 1
POWER AMPLIFIER
+21 dBm
8 Ohms
Max.output power
Min.output impedance
variable
mix between aux and main signal
variable
FUNCTION CONTROLS
Input level
Balanced per channel
Output level per channel
Treble
Bass
+15/-15
+15/-15
mutes the right signal of the respective channel
mutes the left signal of the respective channel
switches channel to mono
FUNCTION SWITCHES
Left mute
Right mute
Mode
8-digit LED display: -18/-12/-6/0/+6/+12/ +18 dBu/CLIP
INDICATORS
Output level
Input level
8-digit LED display: -18/-12/-6/0/+6/+12/ +18 dBu/CLIP
POWER SUPPLY
Mains voltage
USA/Canada 120V~ 60Hz
U.K./Australia 240V~ 50Hz
Europe 230V~ 50Hz
General export model 95-120V~ 210-240V~ 50-60 Hz
40 W
Power consumption
Fuse 95-120V T315 mAL / 210-240V T200mAL
Mains connection
Standard IEC receptacle
2.9 kg(6.39 lbs)
PHYSICAL
483 217 44 mm(19" 8.54" 1.7")
Dimension(W D H)
Net weight
3
4
INPUT LEVEL(dBu)
INPUT GAIN
3
24
5
6
1
0
0CLIP
18 12 661812
DIRECT IN
CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUT GAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 6618
CHANNEL 1
MAIN SECTION
910
11 13
125
6
7
8
12
3. CONTROL ELEMENTS
MAIN SECTION:
1. DIRECT IN
You can use this socket to an additional stereo signal into your IHA4PRO.
This socket is in "priority". It means that when you insert the jack, the signal
into the MAIN input on the rear panel will be disconnected.
connect
connected
2. INPUT GAIN
This knob controls the level of the signal to the MAIN or DIRECT IN inputs.connected
3. INPUT LEVEL
This LED meter indicates the input signal level. The range goes from -18 to +18dBu.
For the best sound quality, the LED meter should be lighting between +6 and +18dBu.
If CLIP LED is lighting, you need to reduce the input signal level with input gain control.
Between -18 and -12 dBu, you will experience a bad S/N ratio and you should increase
the input signal level.
CHANNEL SECTION:
4. AUX IN
This stereo input is useful when you want to an additional signal with the signals
applied to MAIN or DIRECT IN inputs. If you have a stereo signal depress the MONO
switch. If you have a mono signal, press the MONO switch if you want such signal to
appear on both ears.
connect
There are 4 channels on your IHA4PRO with identical functions and performance.
5. L & R MUTE SWITCHES
Through these switches, you can mute the respective input signals one at a time or
both at the same time.
2
9

3
3. CONTROL ELEMENTS
This 8-digit led meter the level of the output signal and ranges from -18 dBu
to +18 dBu. When the Clip LED lights up, please turn down the Output Gain Control
to avoid any distortion.
indicates
attenuate or boost the low frequency signal by +/-15 dB.Use this knob to
13. TREBLE CONTROL
attenuate or boost the high frequency signal by +/-15 dB.Use this knob to
9. BALANCE CONTROL
This knob has a double function. When the AUX IN input is not in use it will regulate
the stereo imaging of the input signal. When a signal is into the AUX IN
input, the balance control will regulate the ratio of MAIN IN (or DIRECT IN) and AUX
IN input signals.
connected
10. OUTPUT GAIN
This knob controls the output volume of the channel. Both right and left signals are
regulated at the same time.
11. OUTPUT LEVEL
12. BASS CONTROL
6. MONO SWITCH
Depress the switch if you want to hear a stereo signal. Press it again if you want to
hear a mono signal.
7. MONO LED:
When the MODE switch is engaged, this LED will light up.
8. HEADPHONE OUT
This connector is wired in parallel with the correspondent output connector on the
rear panel. It is useful to connect headphones when your IHA4PRO is installed
into a rack.
8
5. INSTALLATION AND CONNECTION
Tip
Ring
Sleeve
Tip
Ring
Sleeve
Tip
Ring
Sleeve
1
2
3
1
2
3
1
2
3
TIP RING SLEEVE SLEEVE RING TIP
TIP RING SLEEVE
21
3
12
3
12
3
Tip
Ring
Sleeve
Tip
Ring
Sleeve
Tip
Sleeve
Tip
Sleeve
Tip
Sleeve
Centre
Centre
Centre
Screen
Screen
Screen
1
2
3
Tip
Ring
Sleeve
1
2
3
1
2
3
Tip
Ring
Sleeve
1
2
3
Tip
Sleeve
1
2
3
Balanced
TIP SLEEVE
TIP SLEEVE
TIP RING SLEEVE
TIP RING SLEEVE
12
3
21
3
21
3
TIP RING SLEEVE
TIP SLEEVE
12
3
12
3
SLEEVE TIP
SLEEVE RING TIP
Unbalanced

4
3. CONTROL ELEMENTS
Rear Panel
14. AC Inlet and Fuse Holder
15. MAIN INPUT LEFT & RIGHT
Use these connectors to input the stereo signal. You can input the main signal via the
balanced 1/4" TRS phone jacks or XLR connectors.
16. Main Output Connectors
Use these connectors to output the stereo signal via the balanced 1/4" TRS jacks or
XLR connectors. You can also use these connectors to link as many additional
IHA4PRO as you wish if you need to use many headphones channels.
17. HEADPHONE OUT (1 to 8)
These are totally 8 additional outputs for headphones (two for each channel) wired in
parallel with the output available on the front channel.
5.1 Mains Connection
Please ensure that the IHA4PRO is set to the correct supply voltage before plugging the
power cord into the wall outlet. Use the same fuse as marked on the fuse holder at the AC
power connection socket. The mains connection of the IHA4PRO is made by using the
enclosed mains cord and a standard IEC . It meets all of the international safety
certification requirements.
connector
5.2 Audio Connection
The IHA4PRO with balanced XLR and 1/4" TRS phones jack. It can be
interfaced in several ways to support a variety of applications without any signal loss.
A defective or low quality wiring will demage the performance of your IHA4PRO, so
please use good quality screened audio cables only. Please follow the guide below
for the correct pin assignment.
is equipped
7
5. INSTALLATION AND CONNECTION
For 1/4" Phone jack
XLR Type Unbalanced XLR Type balanced
Pin3 (-)
Pin2 (+)
Pin1 ( )
(Linked to Pin1 manually, )
Pin1 ( )
Pin2 (+)
Pin3 (-)
TRS Type Balanced
Tip
Ring
Sleeve
+
-
TRS Type Unbalanced
Tip
Ring
Sleeve
+
TS Type Unbalanced
Sleeve
Tip
+
For XLR Connector
14 1516
17
This connector is used to connect the supplied power cord. Please check the voltage
accepted by the unit and the voltage from your AC sockets before connecting the unit to
the Mains.
If the fuse blows, replace with a fuse of the correct type only.
MAIN INPUT LEFT
MAIN INPUT RIGHTMAIN OUTPUT RIGHT MAIN OUTPUT LEFT
HEADPHONE OUT 4 HEADPHONE OUT 3 HEADPHONE OUT 2 HEADPHONE OUT 1
TIP:L- CHANNEL
RING:R- CHANNEL
MIN. LOAD 8OHMS
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
TIP/PIN 2
RING/PIN 3
SLEEVE/PIN 1
Rated Power Consumption 40W
FUSE:
110-120V T315mAL AC250V
220-240V T200mAL AC250V
REPLACE FUSE WITH CORRECT
TYPE ONLY
Apparaten skall anslutas till
jordat uttag nar den ansluts
till ett natverk
MADE IN CHINA
PUSH
21
3
NEW TIDE
PUSH
21
3
NEW TIDE

5
4. APPLICATIONS
USING THE MAIN IN CONNECTORS
First, connect a signal source to the MAIN IN connectors on the rear panel of your
IHA4PRO. Set the Input Gain (Main section) and the Balance control (Channel section)
on centre position.
Check the input level Meter for optimal operation as described in this .
Connect the headphones you want to use and start to the output gain of each
channel to the desired listening volume. Adjust Bass and Treble control as you wish.
Output gain of all channels should be turned down at this step.
previously manual
increase
USING THE AUX IN INPUTS
You can playback a signal and additional vocals through a microphone andconnect
mixer/preamplifier connected into the AUX IN socket. Use the balance control to mix
the AUX IN input signals to the voice and the playback signal. Use the OUTPUT GAIN
control to regulate the overall desired volume.
6
Through the AUX IN inputs you can also use the 4 channels of your IHA4PRO independently
to give individual to 4 different musicians. Connect the Aux Sends or Subgroupssignals
outputs directly to the AUX IN input of your IHA4PRO. You need a mixer with 4 Aux
sends outputs or with 4 subgroups . Now rotate the BALANCE control on your IHA4PRO
fully to the left. In this way you will exclude the MAIN signal and only the AUX IN signal
will be sent to the headphones.
TO MAIN INPUT
AUX SEND
4. APPLICATIONS
The IHA4PRO 4-Channel Headphone Amplifier fits into one standard 19" rack unit .
Please allow at least an additional 4" depth for the connectors on the rear panel.
Be sure that there is enough space around the unit for sufficient ventilation and
please do not place your IHA4PRO 4-Channel Headphone Amplifier close to high
temperature devices such as power amplifiers etc. to avoid overheating.
1. RACK MOUNTING
2. USING MULTIPLE HEADPHONES ON THE SAME CHANNEL
Each channel provides 3 Headphone Outputs. These jacks are all parallel connected.
, please note the impedance information asFor getting the best results
following:
1. For each channel connected with 1 headphone, the minimum impedance of the
headphone can be 8 ohms.
2. For each channel connected with 2 headphones, the minimum impedance of
each headphone can be 16 ohms.
3. For each channel connected with 3 headphones, the minimum impedance of
each headphone can be 24 ohms.
SOME FINAL NOTES
AUX IN1 AUXIN2 AUXIN3 AUXIN4
TO MAIN INPUT
MX6FX MIXER
MX12FX MIXER
DIGITAL MIXER
DIGITAL MIXER
30
0
4
10
POWERPHANTOM
PHANTOM
10
CLIP
2TKTO
CTRLROOM
LINE
BAL UNBAL
2 TRACK IN OUT
IN OUT
L
R
2TKTO MIX
LR
10 8
9
PRESETS
1
12
11 7
4
5
6
3
2
13
14
15
16
PHONES
AUX SENDS
1VIBRAFLANGE
2FUNKY
3ROCKABILLY
4BIGSTAGE
5
8
9
12
13
16
FXLEVEL REVERBLEVEL
VIBRATO
FLANGER
CHORUS
PEAK
CTRL RM OUT
STEREOAUX
RETURNS
L
R
L
R
LINE
MASTERAUX
SEND
1234/56/
BAL UNBAL
L
R
L
R
L
R
MONO MONO MAIN OUT
BALUNBAL
BAL BAL
MIC INPUTMIC INPUT
BALUNBAL
60 60
3030
6-CHMIXING CONSOLE WITH DIGITAL EFFECTS
MX6FX
+4
10
+4
10
+4
10
+4
10
75Hz 75Hz 75Hz 75Hz
+48V+
DSP
15 15 15 15
15 15 15 15
15 15 15 15
PHANTOM
48V
10
88
MX12FX
12-CHMIXING CONOLE
INPUT LEVEL(dBu)
INPUTGAIN
3
24
5
6
1
0
0CLIP
18 12 661812
DIRECTIN
CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUTGAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 6618
CHANNEL 1
MAIN SECTION CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUTGAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 6618
CHANNEL 2 CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUTGAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 6618
CHANNEL 3 CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUTGAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 6618
CHANNEL 4
4-CHANNEL
HEADPHONE
AMPLIFIER
POWER
OFF
ON
IHA4PRO
INPUT LEVEL(dBu)
INPUTGAIN
3
24
5
6
1
0
0CLIP
18 12 661812
DIRECTIN
CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUTGAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 6618
CHANNEL 1
MAIN SECTION CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUTGAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 6618
CHANNEL 2 CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUTGAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 6618
CHANNEL 3 CHANNEL 1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONE OUT
TREBLE
OUTPUTGAIN
0
AUX IN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAIN IN
012 CLIP
18 12 6618
CHANNEL 4
4-CHANNEL
HEADPHONE
AMPLIFIER
POWER
OFF
ON
IHA4PRO
INPUT LEVEL(dBu)
INPUTGAIN
3
24
5
6
1
0
0CLIP
18 12 661812
DIRECTIN
CHANNEL1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONEOUT
TREBLE
OUTPUTGAIN
0
AUXIN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAININ
012 CLIP
18 12 6618
CHANNEL 1
MAIN SECTION
CHANNEL1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONEOUT
TREBLE
OUTPUTGAIN
0
AUXIN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAININ
012 CLIP
18 12 6618
CHANNEL 2
CHANNEL1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONEOUT
TREBLE
OUTPUTGAIN
0
AUXIN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAININ
012 CLIP
18 12 6618
CHANNEL 3
CHANNEL1
OUTPUT LEVEL(dBu)
MUTE R
LMONO
0
15
15 BASS
HEADPHONEOUT
TREBLE
OUTPUTGAIN
0
AUXIN
15
15
24
5
6
1
0
3
MUTE
AUX
BALANCE
MAININ
012 CLIP
18 12 6618
CHANNEL 4
4-CHANNEL
HEADPHONE
AMPLIFIER
POWER
OFF
ON
IHA4PRO