Rear Panel Functions; Main Menu - AMC iAC 120 DSP User Manual

Operation

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: 1 EQ3: 1kHz GAIN: 0dB Q: 1
EQ2: 200Hz GAIN: 0dB Q: 1 EQ4: 4kHz GAIN: 0dB Q: 1
USER MANUAL
→
EQ5: 16kHz GAIN: 0dB Q: 1
EQ6: 18kHz GAIN: 0dB Q: 1
iAC Installation Power Amplifier 07