Atlas Sound AA120M - Manual (Page 6)

Specifications are subject to change without notice
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©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL AA120M MIXER AMPLIFIER
6
FRONT PANEL DESCRIPTION
1.
1. Power Switch
This push on/push off switch applies power to the AA120M.
2. Power LED
This LED illuminates when the power switch is turned on.
3. Peak LED
The PEAK LED will illuminate when the AA120M is in a clipping condition, caused by excessively high
input levels or a GAIN control is turned up too high. An occasional fl ash is OK.
4. Signal LED
This LED will assist you in setting gain structure into the amp. With a source connected to the amp and
playing, turn up the channel gain control until this LED just starts to fl ash. Once all the sources
connected are playing, the SIGNAL LED may be on solid. This condition is normal.
5. Master Gain Control
The MASTER GAIN CONTROL will raise or lower all the input channels together. A good starting point
for setting gain structure is to set MASTER GAIN CONTROL at the 12:00 position, and then adjust
the individual channels one at a time.
6. Input 1-6 Controls
The gain for input channels 1-6 are controlled by these rotary controls. The MASTER GAIN CONTROL
must be turned up in addition to the input controls for audio to be present at the speaker terminals.
7. Bass Control
Normally set at the 12:00 position, rotating clockwise will increase (boost) bass frequencies by
10dB at 100Hz. Rotating counter-clockwise from the 12:00 position will decrease (cut) bass frequencies
by 10dB at 100Hz
8. Treble Control
Normally set at the 12:00 position, rotating clockwise will increase (boost) treble frequencies by 10dB at
10kHz. Rotating counter-clockwise from the 12:00 position will decrease (cut) treble frequencies by
10dB at 10kHz.
   
 
Signal Power
On
Off
Peak
Input 6 Input 5 Input 4 Input 3 Input 2
     
n
Bass Treble
 
n
Input 1
Master
Power
77'(&CC_n[h7cfb_\_[h
6
1
2
3 4 5
7 8