Atlas AA240 Owner's Manual download pdf (Page 7)

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Specifications are subject to change without notice.

Owner’s Manual AA240 Mixer Amplifier

1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.

Telephone: 800.876.3333 • Fax: 800.765.3435

Front Panel Description

1. Power Switch

This push on / push off switch applies power to the AA240.

2. Power LED

This LED will illuminate blue when the AA240 is turned on.

3. Peak LED

The PEAK LED will illuminate Red when the AA240 is in a clipping condition, caused by excessively high input levels or a GAIN con-

trol is turned up too high. An occasional flash is OK.

4. Limit LED

This LED will illuminate Yellow when the amplifier is consuming excessive current. At that point, a limiting circuit is being activated,

preventing the amplifier from failure. The most likely cause for the fault is an incorrect load impedance on the output of the ampli-

fier. The LED should never come on if a proper load is applied.

Note: An occasional LED flash is okay. When LED is ON audible distortion may be heard at the speakers.

5. 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 chan-

nel gain control until this LED just starts to flash green. Once all the sources connected are playing, the SIGNAL LED may be on

solid. This condition is normal.

6. 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.

7. 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.

8. Bass Control

The BASS CONTROL is a shelving type control which will boost or cut bass frequencies at 100Hz at the rate of ±6dB.

9. Treble Control

The TREBLE CONTROL is a shelving type control which will boost or cut treble frequencies at 10kHz at the rate of ±6dB.

0 10

Off

Input 6

Input 5

Input 4

Input 3

Input 2

–

Bass

Treble

–

Input 1

Master

Power

PowerLimitPeakSignal

1 2 3 4 5 6 7 8 9 10 11 12 ... 23 24

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Atlas AA240 Owner's Manual Page 7

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