AMC iAC 120 DSP User manual

User
Manual
iAC
Installation Power Amplier

Safety instructions
USER MANUAL iAC Installation Power Amplier
When using this electronic device, basic precautions
should always be taken, including the following:
1 Read all instructions before using the product.
2 Do not use this product near water (e.g., near a bathtub, washbowl, kitchen sink, in a
wet basement or near a swimming pool etc). Care should be taken that objects do not
fall into liquids and liquids would not be spilled on the device.
3 Use this device when you are sure that it has a stable base and it is fixed securely.
4 This product, in combination with loudspeakers may be capable of producing sound
levels that could cause permanent hearing loss. Do not operate for a long period of
time at a high volume level or at a level that is uncomfortable. If you experience any
hearing loss or ringing in the ears, you should consult with otorhinolaryngologist.
5 The product should be located away from heat sources such as radiators, heat vents,
or other devices that produce heat.
6 Note for power connections: for pluggable equipment, the socket-outlet shall be
installed near the equipment and shall be easily accessible.
7 The power supply should be undamaged and never share an outlet or extension
cord with other devices. Never leave device plugged into the outlet when it is not
being used for a long period of time.
8 Power disconnection: when the power cord connected to the power grid is
connected to the machine, the standby power is turned ON. When the power switch
is turned ON, the main power is turned ON.The only operation to disconnect the
power supply from the grid, unplug the power cord.
9 Protective Grounding - An apparatus with class I construction shall be connected to
a power outlet socket with a protective grounding connection.
Protective Earthing - An apparatus with class I construction shall be connected to a
mains socket outlet with a protective earthing connection.
10 The lightning flash with an arrowhead symbol, with an equilateral triangle,
is intended to alert the user to the presence of uninsulated dangerous
voltage’within the products enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to persons.
11 The exclamation mark within an equilateral triangle is intended to alert the
user to the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the appliance.
12 There are some areas with high voltage inside, to reduce the risk of electric shock
do not remove cover of the device or power supply.
The cover should be removed by the qualified personnel only.
13 The product should be serviced by qualified service personnel if:
– The power supply or the plug has been damaged.
– Objects have fallen into or liquid has been spilled on the product.
– The product has been exposed to rain.
– The product has been dropped or the enclosure damaged.

Table of contents
USER MANUAL iAC Installation Power Amplier
Before you start
Introduction......................................................................................................................................................2
Features................................................................................................................................................................2
Operation
Front/rare panel of iAC 120 DSP.........................................................................................................3
Front/rare panel of iAC 240 DSP and iAC 360 DSP................................................................4
Front/rare panel of iAC 2X240 DSP...................................................................................................5
Front panel functions.................................................................................................................................6
Rear panel functions...................................................................................................................................7
Main menu........................................................................................................................................................7
RS232 codes | Send Sequences .......................................................................................................11
Specifications
General specifications.............................................................................................................................24

USER MANUAL iAC Installation Power Amplier
Before you start
02
iAC amplifiers with an integrated signal processor are designed for 100 V and low impedance
background music systems. The model line consists of single-channel and two-channel amplifiers.
They all have an RS 232 control port for integration amplifier with third-party automation systems.
Balanced Phoenix and stereo RCA input with audio link connection for easy installation, multiple
voltage output suitable for 4 Ω, 70 V, and 100 V speaker lines.
FEATURES
• Six points parametric EQ
• Input gain adjustment
• Full RS232 control
• Limiter
• Delay
• Input gate
• Low and high pass filter
• Cooling FAN setup
• Transformerless 4ohm output
• Output configuration
• Front panel control lock
• StandBy setup
• Balanced and unbalanced inputs

USER MANUAL iAC Installation Power Amplier 03
1. Stereo RCA & balanced Phoenix inputs |2. Link output |3. RS232 serial interface |4. Reset button |5. Main output |6. Main power connector
7. Power and fuse rating: iAC 120 DSP: 220-240V ~50/60Hz 180W Fuse T1.6AL 250V
Front Panel | iAC 120 DSP
Rear Panel | iAC 120 DSP
1. Power button |2. LCD display |3. Rotary encoder |4. Signal, limiter & mute indicators
Operation
41 2 3
1 2 3 54 6 7

USER MANUAL iAC Installation Power Amplier
Rear Panel | iAC 240 DSP, iAC 360 DSP
Front Panel | iAC 240 DSP, iAC 360 DSP
1. Stereo RCA & balanced Phoenix inputs |2. Link output |3. RS232 serial interface |4. Reset button |5. Main output |6. Main power connector
7. Power and fuse rating: iAC 240 DSP: 220-240V ~50/60Hz 360W Fuse T2AL 250V. iAC 360 DSP: 220-240V ~50/60Hz 540W Fuse T3AL 250V
1 2 3 54 6 7
Operation
1. Power button |2. LCD display |3. Rotary encoder |4. Signal, limiter & mute indicators
41 2 3
04

USER MANUAL iAC Installation Power Amplier
1 2 3 54 6 7
Front Panel | iAC 2X240 DSP
Rear Panel | iAC 2X240 DSP
1. Signal, limiter & mute indicators |2. Power button |3. LCD display |4. Rotary encoder
1. Stereo RCA & balanced Phoenix inputs |2. Link outputs |3. RS232 serial interface |4. Reset button |5. Main output |6 . Main power connector
7. Power and fuse rating: iAC 2x240 DSP: 220-240V ~50/60Hz 720W Fuse T4AL 250V
Operation
1 12 3 4
05

USER MANUAL iAC Installation Power Amplier
Front panel functions
LED INDICARTORS
THE SIGNAL INDICATOR: illuminates to indicate an audio signal in the amplifier's
input.
LIMITER INDICATOR: the amplifier has a built-in audio signal limiter to limit output
power. When the input audio signal exceeds the set threshold, the limiter reduces a
signal level to a safe value and indicates activity.
MUTE INDICATOR: illuminates when mute function is activated. Mutted channel is
indicated with red LED light.
POWER BUTTON
Switch amplifier power ON or OFF.
LCD DISPLAY
LCD screen displays main information and allows adjust amplifier settings.
ROTARY ENCODER
The knob is dedicated to controlling volume and operating an amplifier with the
help of a simple and intuitive menu.
Press and hold the rotary encoder for two seconds to bring the main menu, turn it
to scroll through the menu, and press it shortly to enter the setting or sub-menu.
Adjust parameter value by turning the encoder and press it to save the adjusted
parameter value.
To jump back from any menu and skip the settings hold the encoder until the LCD
brings the home screen. (This method does not apply for EQ adjusting.)
Amplifier automatically saves settings and returns home screen after 20 seconds of
inactivity.
ROTARY ENCODER IAC 2X240 DSP
Push the rotary encoder shortly on the home screen to select amplifier channel CH1
or CH2. Hold it to activate the selected channel menu. All other control the same as
listed above.
Operation
06

USER MANUAL iAC Installation Power Amplier
Operation
07
Rear panel functions
STEREO RCA & BALANCED PHOENIX INPUTS
These inputs are designed for line level audio only. Please use a preamplifier to
connect a microphone to this amplifier. Pay attention: link output links audio from
Phoenix input only, RCA input is not connected to link output.
AMPLIFIER OUTPUTS
Audio outputs for 4 Ω, 70 V, and 100 V speaker lines. Only one output can be used
at the time. 100 V and 70 V outputs are enabled for the default, to use 4 Ω output
enable it first by using Output mode menu (page 10).
RS232 SERIAL INTERFACE
Designed to control the main function of iAC amplifiers by using a serial interface.
RS232 protocol is listed at the end of this user manual (page 12).
RESET BUTTON
This button resets all amplifier parameters to default values. To activate this function,
press and hold button for ten seconds.
MAIN POWER CONNECTOR
Power connector with built-in fuse holder. The fuse specification is listed on the rear
panel.
Main menu
MENU HOME SCREEN
Menu system In normal operating mode shows the volume of each amplifier
channel. Push the rotary encoder to switch iAC2x240DSP channels.
Push and hold the rotary encoder to enter the main menu and access more
controls of parameters.
INPUT GAIN
The amplifier can adjust input gain in the +/- 12dB range. A setting is based on a
DSP chip and dedicated to precisely matching audio source output and amplifier
input levels. Default input gain - 0 dBu. Positive value means that input signal is
amplifier by indicated value, negative value – input level decreased.
EQUALIZER
This is a parametric equalizer. Users are free to change EQ frequency, gain, and Q
factor. Default frequency values are listed below:
EQ1: 120Hz GAIN: 0dB Q: 1EQ3: 1kHz GAIN: 0dB Q: 1EQ5: 16kHz GAIN: 0dB Q: 1
EQ2: 200Hz GAIN: 0dB Q: 1EQ4: 4kHz GAIN: 0dB Q: 1EQ6: 18kHz GAIN: 0dB Q: 1
→

USER MANUAL iAC Installation Power Amplier
Operation
08
Adjusting EQ:
To adjust EQ select one of six EQ presets and press rotary encoder. In this setup
amplifier allows to adjust selected EQ gain in +/- 12dB range. After adjusting
press rotary encoder to save the settings and return main menu.
Setup EQ preset:
EQ frequency and Q factor can be changed by the user on the equalizer Sub-
menu. DSP allows to choose an EQ point frequency in the 20Hz – 20kHz range
and change the Q factor from 0.5 to 12. A smaller Q number represents wider
frequency bandwidth that will be affected by the equalizer.
To change the preset select EQ and press and hold the rotary encoder till
brings the EQ sub-menu. Set the frequency and press the knob to adjust the Q
factor. Another press to save settings and jump back to the EQ menu.
HIGH PASS FILTER
Amplifier has internal high pass filter to cut off low audio frequencies. This filter
parameter depends of amplifier output configuration. In LOW Z mode user is free
to set high pass filter in 20 Hz-400 Hz range while in 100 V mode amplifier's lower
frequencies are limited automatically - user can adjust it further in 120 Hz - 400 Hz
range. High pass filter slope is 6 dB per octave.
LOW PASS FILTER
This option is available in Low Z mode only. The setting allows connecting a passive
subwoofer to amplifier and limit frequency range linked to low Z output. User can
turn off this filer and have a full frequency range in the output or enable a high cut
filter with a possibility to control cut area in 20 Hz - 200 Hz range.
Filter slope is 6 dB per octave.
LIMITER
Audio DSP processor allows setup limiter in the range from -30dB to 0 dB. This
setting keeps the amplifier and speakers in the safe zone and prevents audio
from clipping and loudspeaker overloading. The following charts shows how the
amplifier’s output power depends on the limiter threshold. The limiter attack time
→
→
→→
→→
→→
→→
press and hold

USER MANUAL iAC Installation Power Amplier
Operation
09
DELAY
DSP allows adding delay to an audio signal in 0 – 500ms (0-170m.) range by using
1ms resolution.
Please note that the delay parameter in iAC 2x240 DSP can be adjusted for channel
1 (CH1) only, it also works in bridge mode. iAC 2x240 DSP amplifier’s channel 2
(CH2) do not support delay.
INPUT GATE
The amplifier has an installed audio gate. This function mutes the amplifier if the
audio signal or noise in the input is smaller than the specifier threshold. Users can
enable or disable this function.
By default audio gate is enabled. The audio gate threshold is fixed to -56dBu.
SYNC SETTINGS
The iAC 2x240 DSP Sync function allows to link both channels and copy settings
from one channel to another to control both amplifier channels at once.
There is the option to copy CH1 settings t CH2 or copy CH2 settings to CH1
→
→→
→→
is 1 ms and the release time is fixed to 1000 ms. Default limiter threshold level is
-3 dB. The red color LED in the front panel indicates that the limiter is activated, and
the audio level reached the threshold level.
Limiter threshold relation with output power (100 V output mode)
Limiter threshold relation with output power (4  output mode)
Default limiter setting
Output voltage V
Limiter Threshold (dB)
Limiter Threshold (dB)
Output power (W)
Default limiter setting
100 V output
iAC 120 DSP
iAC 360 DSP
iAC 240 DSP
iAC 2x240 DSP

USER MANUAL iAC Installation Power Amplier
Operation
10
FAN MODE
Amplifier cooling is based on fan powered by main CPU. Normally fan rotates at
low speed in order to keep air circulation inside amplifier. User has option to turn off
the fan and makes amplifier noise free. Despite user settings main CPU constantly
measures power amplifier temperature and if heat rise above dangerous threshold
(70°) main CPU temporary overrides user settings and forces fan to cool down
amplifier untill safe temperature is reached. Default "FAN mode" setting – auto.
OUTPUT SETUP
An iAC amplifier has two kinds of outputs: transformer isolated 100 V / 70 V output,
and Low Z output powered directly from power amp stage. User must setup output
before starting using amplifier. By default amplifier is set for 100 V / 70 V output,
it means that only high voltage output is enabled, also low cut filter is activated.
Please set output mode to LOW Z in order to activate 4 ohm output. In LOW Z
mode high pass filter allows full frequency (20 Hz-20 kHz) range reproduction
while 100 V / 70 V mode limits audio rage to 120 Hz – 20 kHz. LOW Z mode brings
additional option to menu – LOW pass filter. In 100 V / 70 V mode LOW pass filter is
unavailable.
OUTPUT SETUP FOR IAC 2X240 DSP
Two channel amplifiers (iAC 2x240 DSP) can be set to 100 V bridge mode to
combine the power from two output channels to drive a single 100 V audio line. To
enable 100 V Bridge output, a user should set up the amplifier's output mode.
INPUT MATRIX FOR IAC 2X240 DSP
iAC 2x240 DSP amplifier has an option to route any input to any output. This matrix
function allows to use the same audio input on both channels or swap inputs and
outputs for each other. All available settings are listed below.
STANDBY
Manual: manually mutes amplifier and turns off LCD display to save power.
To exit standby mode turn or push the rotary encoder.
→
→→
→→
→→
→
→→

USER MANUAL iAC Installation Power Amplier
Auto: amplifier goes to standby automatically if the main CPU detects no audio in
amplifier inputs. Amplifier automaticity returns to the normal stage as soon as the
CPU detects audio.
Activated standby mode is indicated by the red color LED on the power button.
Operation
11
LOCK
This function locks the front panel control to prevent unauthorized access to the
amplifier control menu or volume adjusting. To disable the function press and hold
the rotary encoder for 5 seconds. The lock function affects front panel controls only,
serial control and reset functions are not free of locking. Lock mode can be also
enabled or disabled by using the RS232 command.
FACTORY RESET
Resets all amplifier parameters to default values.
EXIT
Turns off the menu and returns the default volume control screen.
RS232 codes | Send Sequences
RS232 COMMANDS
The following table lists commands for IAC 120 DSP / 240 DSP / 360 DSP models.
Amplifier iAC 2x240 DSP uses the same command structure only special bytes to
specify the amplifier channel must be sent to control CH1 or CH2 or both channels
and ones (Sync mode).
CH1 control byte 01 Example: MUTE CH1
69 41 43 55 01 02 01 A1 AA
CH2 control byte 02 Example: MUTE CH2
69 41 43 55 02 02 01 A1 AA
SYNC settings control byte 54 Example: MUTE CH1 and CH2
69 41 43 54 01 02 01 A1 AA
Individually channel settings 55 Example: MUTE CH1
69 41 43 55 01 02 01 A1 AA
RS232 CODES ARE LISTED IN HEX
COM Port Settings
Baud Rate: 9600
Parity: None
Data Bits: 8
Stop Bits: 1
Flow Control: No

USER MANUAL iAC Installation Power Amplier
Operation
12
RS232 COMMANDS
Function Command
(CH1 01 CH2 02) Control bytes xx Feedback Data bytes xx
MUTE 69 41 43 55 01 02 01 A1 AA 69 41 43 55 01 5D 02 3F AA
UNMUTE 69 41 43 55 01 02 01 A0 AA 69 41 43 55 01 5D 02 xx AA
After unmute amplifier sends
volume level used before mute
xx – VOLUME LEVEL control bytes
VOL
step control +/- 69 41 43 55 01 02 01 xx AA 01 = VOL + 02 = VOL - 69 41 43 55 01 5D 02 xx AA xx – VOLUME LEVEL control bytes
SET VOL LEVEL direct
setup 69 41 43 55 01 04 01 xx AA xx – VOLUME LEVEL control bytes 69 41 43 55 01 5D 02 xx AA xx – VOLUME LEVEL control bytes
INPUT GAIN step
control +/- 69 41 43 55 01 05 01 xx AA 01 = GAIN + 02 = GAIN - 69 41 43 55 01 5D 05 xx AA xx – GAIN LEVEL control bytes
SET INPUT GAIN direct
setup 69 41 43 55 01 06 01 xx AA xx – GAIN LEVEL control bytes 69 41 43 55 01 5D 05 xx AA xx – GAIN LEVEL control bytes
LOW PASS filter
step control +/- 69 41 43 55 01 07 01 xx AA 01 = LOW PASS F + 02 = LOW PASS F - 69 41 43 55 01 5D 07 xx AA xx – LOW PASS control bytes
LOW PASS filter direct
setup 69 41 43 55 01 08 01 xx AA xx – LOW PASS control bytes 69 41 43 55 01 5D 07 xx AA xx – LOW PASS control bytes
HIGH PASS filter
step control +/- 69 41 43 55 01 09 01 xx AA 01 = HIGH PASS + 02 = HIGH PASS - 69 41 43 55 02 5D 09 xx AA xx – HIGH PASS control bytes

USER MANUAL iAC Installation Power Amplier
Operation
13
Function Command
(CH1 01 CH2 02) Control bytes xx Feedback Data bytes xx
HIGH PASS filter direct
setup 69 41 43 55 01 0A 01 xx AA xx – HIGH PASS control bytes 69 41 43 55 02 5D 09 xx AA xx – HIGH PASS control bytes
LIMITER threshold step
control +/- 69 41 43 55 01 0B 01 xx AA
01 = LIMITER +
02 = LIMITER - 69 41 43 55 01 5D 0B xx AA xx – LIMITER threshold level bytes
LIMITER threshold
direct setup 69 41 43 55 01 0C 01 xx AA xx – LIMITER threshold level bytes 69 41 43 55 01 5D 0B xx AA xx – LIMITER threshold level bytes
DELAY time +/- 69 41 43 55 01 0D 01 xx AA 01 = DELAY +
02 = DELAY - 69 41 43 55 01 5D 0D xx xx AA xx xx – DELAY time bytes
DELAY time
direct setup 69 41 43 55 01 0E 01 xx xx AA xx xx – DELAY time bytes 69 41 43 55 01 5D 0D xx xx AA xx xx – DELAY time bytes
OUTPUT MODE 69 41 43 55 01 0F 01 xx AA
00 = 2CH 100V
01 = 2CH Low Z
02 = Bridge mode
(iAC 2x240DSP only)
69 41 43 55 01 5D 0F xx AA
00 = 2CH 100V
01 = 2CH Low Z
02 = Bridge mode
(iAC 2x240DSP only)
EQ frequency adjust by
step + 69 41 43 55 01 21 01 xx 01 AA xx = EQ point number 69 41 43 55 01 5D 21 xx yy AA xx – EQ point number yy – EQ frequency
EQ frequency adjust
by step - 69 41 43 55 01 21 01 xx 02 AA xx = EQ point number 69 41 43 55 01 5D 21 xx yy AA xx – EQ point number yy – EQ frequency
EQ frequency direct
setup 69 41 43 55 01 22 01 xx yy AA xx – EQ point number yy – EQ frequency 69 41 43 55 01 5D 21 xx yy AA xx – EQ point number yy – EQ gain value

USER MANUAL iAC Installation Power Amplier
Operation
14
Function Command
(CH1 01 CH2 02) Control bytes xx Feedback Data bytes xx
EQ gain adjust by
step + 69 41 43 55 01 23 01 xx 01 AA xx = EQ point number 69 41 43 55 01 5D 23 xx yy AA xx – EQ point number yy – EQ gain value
EQ gain adjust by step - 69 41 43 55 01 23 01 xx 02 AA xx = EQ point number 69 41 43 55 01 5D 23 xx yy AA xx – EQ point number
yy – EQ gain value
EQ gain setup 69 41 43 55 01 24 01 xx yy AA xx – EQ point number
yy – EQ gain value 69 41 43 55 01 5D 23 xx yy AA xx – EQ point number yy – EQ gain value
EQ Q factor adjust by
step + 69 41 43 55 01 25 01 xx 01 AA xx = EQ point number 69 41 43 55 01 5D 25 xx yy AA xx – EQ point number yy – Q factor value
EQ Q factor adjust by
step - 69 41 43 55 01 25 01 xx 02 AA xx = EQ point number 69 41 43 55 01 5D 25 xx yy AA xx – EQ point number yy – Q factor value
EQ Q factor direct
setup 69 41 43 55 01 26 01 xx yy AA xx – EQ point number yy – Q factor value 69 41 43 55 01 5D 25 xx yy AA xx – EQ point number yy – Q factor value
INPUT GATE 69 41 43 55 0D 15 01 xx AA 00 – disabled
01 - enabled 69 41 43 55 0D 5D 15 xx AA 00 – disabled 01 - enabled
INPUT MODE
(iAC 2x240 DSP only) 69 41 43 55 0D 14 01 xx AA
00 - IN1->OUT1 IN2->OUT2
01 - IN1->OUT2 IN2->OUT1
02 - IN1->OUT1 IN1->OUT2
03 - IN2->OUT1 IN2->OUT2
69 41 43 55 0D 5D 14 xx AA
00 - IN1->OUT1 IN2->OUT2
01 - IN1->OUT2 IN2->OUT1
02 - IN1->OUT1 IN1->OUT2
03 - IN2->OUT1 IN2->OUT2
FAN MODE 69 41 43 55 0D 13 01 xx AA 00 – off
01 - auto 69 41 43 55 0D 5D 13 xx AA 00 – off 01 - auto

USER MANUAL iAC Installation Power Amplier
Operation
15
Function Command
(CH1 01 CH2 02) Control bytes xx Feedback Data bytes xx
RESET 69 41 43 55 0D 12 01 01 AA 69 41 43 55 0D 5D 12 01 AA
LOCK/UNLOCK 69 41 43 55 0D 11 01 xx AA 00 = unlock
01 = lock 69 41 43 55 0D 5D 11 xx AA 00 = unlocked 01 = locked
STANDBY 69 41 43 55 0D 10 01 xx AA 00 = off
01 = on 69 41 43 55 0D 5D 10 xx AA 00 = off 01 = on
FIRMWARE VERSION 69 41 43 55 01 FF 01 00 AA 69 41 43 55 01 5D FF 32 AA
(Firmware version on screen)
READ AMP STATUS 69 41 43 55 01 FA 01 00 AA Returns all amplifier’s data
VOLUME LEVEL control bytes
00 = 0 dB 07 = -7 dB 0E = -14 dB 15 = -21 dB 1C = -28 dB 23 = -35 dB 2A = -42 dB
01 = -1 dB 08 = -8 dB 0F = -15 dB 16 = -22 dB 1D = -29 dB 24 = -36 dB 2B = -43 dB
02 = -2 dB 09 = -9 dB 10 = -16 dB 17 = -23 dB 1E = -30 dB 25 = -37 dB 2C = -44 dB
03 = -3 dB 0A = -10 dB 11 = -17 dB 18 = -24 dB 1F = -31 dB 26 = -38 dB 2D = -45 dB
04 = -4 dB 0B = -11 dB 12 = -18 dB 19 = -25 dB 20 = -32 dB 27 = -39 dB 2E = -46 dB
05 = 5 dB 0C = -12 dB 13 = -19 dB 1A = -26 dB 21 = -33 dB 28 = -40 dB 2F = -47 dB
06 = -6 dB 0D = -13 dB 14 = -20 dB 1B = -27 dB 22 = -34 dB 29 = -41 dB

USER MANUAL iAC Installation Power Amplier
Operation
16
GAIN LEVEL control bytes
00 = -12 dB 04 = -8 dB 08 = -4 dB 0C = 0 dB 10 = 4 dB 14 = 8 dB 18 = 12 dB
01 = -11 dB 05 = -7 dB 09 = -3 dB 0D = 1 dB 11 = 5 dB 15 = 9 dB
02 = -10 dB 06 = -6 dB 0A = -2 dB 0E = 2 dB 12 = 6 dB 16 = 10 dB
03 = -9 dB 07 = -5 dB 0B = -1 dB 0F = 3 dB 13 = 7 dB 17 = 11 dB
LOW PASS control bytes
00 = 20 Hz 02 = 60 Hz 04 = 100 Hz 06 = 140 Hz 08 = 180 Hz 0A = OFF
01 = 40 Hz 03 = 80 Hz 05 = 120 Hz 07 = 160 Hz 09 = 200 Hz
HIGH PASS control bytes
00 = 20 Hz 06 = 80 Hz 0C = 140 Hz 12 = 200 Hz 18 = 260 Hz 1E = 320 Hz 24 = 380 Hz
01 = 30 Hz 07 = 90 Hz 0D = 150 Hz 13 = 210 Hz 19 = 270 Hz 1F = 330 Hz 25 = 390 Hz
02 = 40 Hz 08 = 100 Hz 0E = 160 Hz 14 = 220 Hz 1A = 280 Hz 20 = 340 Hz 26 = 400 Hz
03 = 50 Hz 09 = 110 Hz 0F = 170 Hz 15 = 230 Hz 1B = 290 Hz 21 = 350 Hz
04 = 60 Hz 0A = 120 Hz 10 = 180 Hz 16 = 240 Hz 1C = 300 Hz 22 = 360 Hz
05 = 70 Hz 0B = 130 Hz 11 = 190 Hz 17 = 250 Hz 1D = 310 Hz 23 = 370 Hz

USER MANUAL iAC Installation Power Amplier 17
Operation
LIMITER threshold control bytes
00 = 0 dB 05 = -5 dB 0A = -10 dB 0F = -15 dB 14 = -20 dB 19 = -25 dB 1E = -30 dB
01 = -1 dB 06 = -6 dB 0B = -11 dB 10 = -16 dB 15 = -21 dB 1A = -26 dB
02 = -2 dB 07 = -7 dB 0C = -12 dB 11 = -17 dB 16 = -22 dB 1B = -27 dB
03 = -3 dB 08 = -8 dB 0D = -13 dB 12 = -18 dB 17 = -23 dB 1C = -28 dB
04 = -4 dB 09 = -9 dB 0E = -14 dB 13 = -19 dB 18 = -24 dB 1D = -29 dB
EQ point number control bytes
00 = EQ1 01 = EQ2 02 = EQ3 03 = EQ4 04 = EQ5 05 = EQ6
EQ frequency control bytes
00 = 20 Hz 06 = 80 Hz 0C = 500 Hz 12 = 2 kHz 18 = 8 kHz 1E = 14 kHz 24 = 20 kHz
01 = 30 Hz 07 = 90 Hz 0D = 600 Hz 13 = 3 kHz 19 = 9 kHz 1F = 15 kHz
02 = 40 Hz 08 = 100 Hz 0E = 700 Hz 14 = 4 kHz 1A = 10 kHz 20 = 16 kHz
03 = 50 Hz 09 = 200 Hz 0F = 800 Hz 15 = 5 kHz 1B = 11 kHz 21 = 17 kHz
04 = 60 Hz 0A = 300 Hz 10 = 900 Hz 16 = 6 kHz 1C = 12 kHz 22 = 18 kHz
05 = 70 Hz 0B = 400 Hz 11 = 1 kHz 17 = 7 kHz 1D = 13 kHz 23 = 19 kHz

USER MANUAL iAC Installation Power Amplier
Operation
18
EQ gain control bytes
00 = -14 dB 03 = -8 dB 06 = -2 dB 0D = 4 dB 0A = 10 dB
01 = -12 dB 04 = -6 dB 07 = 0 dB 0C = 6 dB 09 = 12 dB
02 = -10 dB 05 = -4 dB 0E = 2 dB 0B = 8dB 08 = 14 dB
Q factor control bytes
00 = 0.5 04 = 2.5 08 = 4.5 0C = 6.5 10 = 8.5 14 = 10.5
01 = 1 05 = 3 09 = 5 0D = 7 11 = 9 15 = 11
02 = 1.5 06 = 3.5 0A = 5.5 0E = 7.5 12 = 9.5 16 = 11.5
03 = 2 07 = 4 0B = 6 0F = 8 13 = 10 17 = 12