
AA240
STRATEGY SERIES AMPLIFIER
MODEL AA240
FEATURES
• 5 Mic/Line Inputs w/ Phantom Power
• 1 Stereo Aux Line Input
• Input 1 has VOX Send
• Tape Output
• Dual Line Output
• Pre Out/Power In Patch
• Remote and VOX Activated Mute
• Zone 2 (MOH Out) 1W @ 8Ω and 1.5V @ 600Ω 
• VCA Level Control
• Bridge I/O (Mix Bus Combining)
• Special Low Cut Filter is 6dBu/octave at 400Hz and also bypasses front panel bass control to 
allow use with paging horns like the Atlas Sound APX40TN and AP-15T
AA240
AA240 (Back View)
GENERAL DESCRIPTION
The AA240 is a 240W 6 input channel mixer amplifier engineered with unique features to assist 
the contractor or installer in today’s commercial business audio environment. It is designed for 
distributed paging and background music (BGM) systems, small to medium speech privacy 
systems, and in applications where music on hold (MOH) plus paging is required.
With (5) microphone/line inputs and (1) stereo line input, the AA240 will accommodate a variety 
of input sources including paging microphones, CD players, and digital music receivers. This 6 
input mixer amplifier features muting and output options along with a very unique bridge in/out 
feature to allow combining of multiple amplifiers in ballroom applications without the need for 
external relays. VCA remote level control circuitry is included which may be assigned to the 
BGM input or globally for the entire amplifier.
The output power of 240 Watts will match nicely with Atlas Sound FAP, SM, SD, and GD series 
loudspeakers. 25V, 70.7V, 100V, and 8 Ohm outputs are provided. 
SPECIFICATIONS
Power Rating: 240 Watts RMS @ 70.7V
(Maximum average power @ 50Hz to 20kHz with .5% THD) 
Inputs: Input #1 Mic/Line/Tel (optional transformer available), Inputs #2-5 Mic/Line, 
Input 6 unbalanced RCA summing line level
Outputs: 
Main: 240W RMS 8 Ohm, 25V, 70.7V, and 100V 
Zone 2: 1 Watt @ 8 Ohms & 1.5V @ 600 Ohm line level 
Power Consumption: 700 Watts 
Dimensions: 16.54" W x 4.21" H x 14.06" D (420mm x 107mm x 357mm) 
Weight: 27.85lbs (12.63kg)
Five
Specifications subject to change without notice
1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A. 
TELEPHONE: (800) 876-3333 / FAX (800) 765-3435
 © 2006 Atlas Sound  Printed in U.S.A.    ATS002450 RevA 10/06  SL5-2092
AtlasSound.com
315

ARCHITECT AND ENGINEER SPECIFICATIONS
The mixer/amplifier shall control and mix up to six input signals and 
deliver an audio output of 240W into 8 Ohm, 25V, 70V, and 100V. 
The amplifier output shall be transformer isolated with a frequency 
response 50Hz to 20kHz (- 3dB) with less than 0.5% THD at rated 
output. The output regulation shall be less than 2dB, no load to full 
load. It shall be capable of operation from a 110/120 VAC 50/60Hz 
line. The mixer/amplifier shall be fan assist cooled. The amplifier shall 
have thermal and short circuit protection.
The mixer/amplifier shall have a switch selectable MIC/TEL balanced 
input to accept either low impedance microphone or Tel/Line Level 
signals with -50/-10dBv sensitivity. The MIC / TEL input impedance 
shall be 10k Ohms or 600 Ohms with optional input transformer. The 
MIC/TEL input shall include an auto mute (VOX Mute) sensitivity 
control. The MUTE SENSE control will allow threshold adjustment of 
mute activation. The mixer/amplifier shall include 4 switch selectable 
MIC/Line inputs. The MIC/Line input impedance shall each be 10k 
ohms. The mixer/amplifier shall have defeatable global Phantom 
power. The mixer/amplifier shall include a stereo summing auxiliary 
input, unbalanced, -10dBv, with dual-RCA jacks. The Auxiliary input 
impedance shall be 10k Ohms. 
The mixer/amplifier shall include two Zone 2 outputs, a 1W at 8 Ohms 
output and a transformer isolated 600 Ohm output with a maximum 
level of 1.5V. The Zone 2 outputs shall be assigned to the auxiliary 
input and has one rear panel rotary level control for both outputs. 
The mixer/amplifier rear panel input and output interconnects shall 
be via Phoenix and terminal connectors. The mixer/amplifier Mute 
assignment for Inputs 2-6 is via a rear panel dipswitch. Input Mute 
is accomplished via the REMOTE MUTE function, controlled by an 
external switch closure or via Input 1 VOX. The Mute assignment shall 
not affect the Zone 2 output.
The mixer/amplifier shall incorporate a balanced Bridge input/output 
allowing multiple amplifiers to be combined as one mixed bus. The 
Bridge input shall be activated via an external switch closure. The 
mixer amplifier shall incorporate VCA remote level control circuitry 
for either Master or Auxiliary level via an optional external 10K 
potentiometer. 
The AA240 front panel shall include volume controls for Inputs 1-6 
and one Master Level control. System Signal, Peak and Power LEDs 
shall also be incorporated. The mixer/amplifier front panel shall also 
include Bass and Treble tone controls (100Hz and 10kHz, ± 10dB). 
The tone controls shall not affect the Zone 2 output. The mixer/ 
amplifier front panel shall include an AC Mains power switch.
A rear panel AC receptacle (unswitched) shall be included for 
connection of external equipment. Dimensions (W x H x D) shall be 
16.54" (42.01cm) x 4.21" (10.7cm) x 14.06" (35.71cm). Net weight 
shall be 27.85 lbs (12.63kg). Front panel finish and material shall be 
black ABS resin and case finish and material shall be black powder 
coated sheet steel.
The mixer/amplifier shall be Atlas Sound Model AA240. 
The optional rack-mount bracket kit shall be an Atlas Sound 
AARMK2-0. 
The optional input one transformer shall be an Atlas Sound AAIT-600. 
The optional level control security covers shall be an Atlas Sound 
AAVCC-5. 
The optional VCA 10kΩ level control shall be an Atlas Sound 
AAVC-10K.
The mixer/amplifier shall have a 400Hz 6dB per octave low cut filter. 
The filter can be defeated via the dipswitch located on the rear panel. 
When engaged, the Bass Tone control is bypassed. The mixer/ 
amplifier shall have a Tape-Out RCA unbalanced output. The Tape 
-Out shall be Pre Tone and the Low Cut Filter The mixer/amplifier 
shall have a Line A and B RCA unbalanced output. The Line outputs 
are POST Master Level, tone controls, Low Cut Filter and Power Amp 
In. The mixer/amplifier shall have a Pre-Out RCA unbalanced output.  
The Pre Out shall be POST Tone, Low Cut Filter and Pre Master 
Level. The mixer/amplifier shall have a Power Amp input for use with 
an external signal processor. The Power Amp In shall be Pre Master 
Level. Both the Line and Pre Outputs shall be calibrated to 0dBv and 
equals 1V RMS out. 
Specifications subject to change without notice
1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A. 
TELEPHONE: (800) 876-3333 / FAX (800) 765-3435
 © 2006 Atlas Sound  Printed in U.S.A.    ATS002450 RevA 10/06  SL5-2092
AtlasSound.com

STRATEGY SERIES AMPLIFIER
MODEL AA240
AA240
Unswitched Outlet 
120V AC 60Hz 
Max 500W
120V AC 60Hz 500W
Outlet Breaker 
125V AC 4A 
Push Reset
Speaker Output 240W
8
¡
Bridge
In/Out
G+
100V70V25VCom
Zone 2 Out
1W 8 600
Sel
Pre Out
Pwr In
Remote
¡¡
++
Tape Out
A
B
£Ид£К>VКV>ЮКЫ`°]КГ]К/8КЗx££К 
nдд®КnЗИООООКМ>Г-Х`°V
Mute
Line Out
VCA
Zone 2
Level
Input 6
R
L
Input 5
G
Trim 
Input 5
Input 4
Input 3
Trim
Trim
1
23
Input 6
Sens
Line
100mV 
300mV
Mic
Input 4 Input 3 Input 2 Input 1
G
+
Input 1
Input 2
Trim
Trim
5
4
Input 4Input 5 Phantom
Line
Line
Line 
Mic
Mic
Mic Mic
G
+
POWER OUTPUT
Max. Average Power @ 50Hz-20kHz with .5% THD (10-80kHz fi lter) 8 Ohm, 1kHz, 240W RMS
TRANSFORMER OUTPUTS
8Ω              240W RMS 
25V              240W RMS 
70V              240W RMS 
100V             240W RMS
FREQUENCY RESPONSE
50Hz-20kHz ± 3dB
DISTORTION
<1% at rated power (1kHz)
SENSITIVITY
Input 1     Line/Tel  316mV (-10dBV) 10k Ohm (600Ω w/ optional transformer) 
      Mic   .316mV~3.16mV (-70dBV~ -50dBV) 
Inputs 2-5    Line   316mV (-10dBV) 10k Ohm 
      Mic   .316mV~3.16mV (-70dBV~ -50dBV) 
Input 6     Line   300mV/100mV (-10dBV/-20dBV) Selectable
OUTPUTS
Main:  Transformer coupled, balanced, 8Ω, 25V, 70V, and 100V 
Zone 2- 8Ω  Unbalanced 1W 
Zone 2- 600Ω  Balanced 1.5V
SIGNAL TO NOISE RATIO
Mic  >55dB 
Line  >55dB 
Telephone >75dB
TONE CONTROLS
Bass    ±10dB @ 100Hz 
Treble  ±10dB @ 10kHz
INDICATORS
Power, signal, peak
POWER CONSUMPTION
700 Watts
DIMENSIONS
16.54"W x 4.219"H x 14.06"D (420mm X 107mm X 357mm)
WEIGHT
77(*&
Input 1
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Sens 
67
8
VCA
Input 1Input 2Input 3
Master
Tel/Line
Off 
On
Input 6
G
+
+
Low Cut 
Off 
On
23
Input 6
Off 
On
G
6
51
4
Input 3
Input 2
Input 4
Input 5
Mute Rcv
Off
OffOnOff
Off
On
On
On
+
Five
Specifications subject to change without notice
1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A. 
TELEPHONE: (800) 876-3333 / FAX (800) 765-3435
 © 2006 Atlas Sound  Printed in U.S.A.    ATS002450 RevA 10/06  SL5-2092
AtlasSound.com
317