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AtlasSound.com
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
12. Input 1 Sens
This control adjusts how sensitive the mute send circuitry on INPUT 1 reacts. Setting the control fully counter clockwise will lower
the sensitivity and a higher amplitude signal will be required at INPUT 1 to trigger the mute send circuits. Fully clockwise will raise
the sensitivity of the mute circuits, where a lower amplitude signal will trigger a mute send. Careful calibration of this control may
be required to fully utilize the mute circuits’ capabilities. Adjustment of this control should occur after the input trim (13) for channel
1 is set.
13. Inputs 1-5 Trim
These variable controls allows fine tuning of the gain of INPUTS 1 – 5. There is 20dB of variable gain available. The trim only applies
when the input is set to the “Mic” position on the dipswitch.
14. Zone 2 Level
This rotary control will vary the signal level at the Zone 2 output terminals. Fully counter-clockwise (0) is off; fully clockwise (10) is
the maximum output level. The Zone 2 output gets its signal from INPUT 6.
15. VCA
Remote location of the level control can be accomplished via the VCA control port. You can control the overall level (Master) or
just Input 6. This selection is made via Dipswitch “B” position #8. Connect the two leads from the optional remote volume control
(AAVC-10K) to these terminals. This remote level control is POST Master and Input 5 Level Controls. Set the system's maximum
levels using the amplifier level controls and then use the remote VCA potentiometer as an attenuator from the maximum levels set.
See the VCA setup section for instructions on wiring the potentiometer.
16. Remote Mute
The Remote Mute feature is useful when the background system needs to be muted from a remote location. When shorting the
Remote Mute terminals together, (G) to (M), the assigned channels will be muted.
Note: Input 1 cannot be VOX or remote muted at anytime. Dipswitches 2-5 settings determine which inputs are to receive the
Mute trigger. To trigger the mute it is common to use an external contact closure or switch on a microphone.
17. Zone 2 Output – 600
Ω
The 600
Ω
1.5V (Zone 2 Out) output is typically connected to a PBX MUSIC ON HOLD port, also known as MOH. The ZONE 2 out
-
put gets its signal from INPUT 6.
18. Zone 2 Output – 1 Watt 8
Ω
The 8
Ω
1W Zone 2 output can drive an external 8
Ω
speaker, and is taken Pre input 6 gain control. Use the 1W 8
Ω
terminals for con-
nection to an external speaker.
19. Bridge In/Out
Certain installations have the need to combine one or more mixers together. These mixers may be in different rooms of an install
but have the need to share a page or music throughout the installation. These terminals provide a way to send and receive bal-
anced line level signals from the internal mix bus of the AA240. The “BRIDGE IN/OUT” feature is PRE Tone Controls and Low Cut
Filter the Bridge In/Out feature allows you to send and receive a balanced signal. This is important for allowing longer distances
between the mixers.
Note: This function should ONLY be used with other Atlas Sound mixers that have this feature. The Send and Receive signals are
combined through the same terminals. To activate this feature, see number 20 Bridge Select.
VCA
In/Out
Bridge
Sel
Zone 2 Out
Ω
1W 8
Ω
600
Remote
Mute
Input 2
Trim
Input 3
Trim
Input 5
Input 6
Off
On
Off
On
Off
On
Off
On
Input 2
On
Off
Line
Mic
Line
Mic
Line
Mic
Sens
Input 1
Input 2
Input 3
Input 4
Input 5
Phantom
On
Off
Input 6
1
2
3
4
5
300mV
100mV
6
7
Master
Line
Mic
Mic
Tel/Line
Off
On
Mute Rcv
Input 6 Input 5 Input 4 Input 3
VCA
5
1
2
3
4
8
Low Cut
6
Input 1
Sens
Input 1
Trim
Input 4
Trim
Input 5
Trim
Zone 2
Level
B
A
Line Out
Speaker Output 240W
Ω
100V
70V
25V
4
Com
+
+
G
+
R
L
Pre Out
Pwr In
Tape Out
Input 6
Input 4
Input 3
Input 2
Input 1
Unswitched Outlet
120V
~
60Hz
Max 500W
Outlet Breaker
125V
~
4A
Push Reset
G
+
G
+
G
+
G
+
+
G
120V AC 60Hz 700W
1601 Jack McKay Blvd., Ennis, TX 75119
(800) 876-3333 AtlasSound.com
CLASS 2 WIRING
