Atlas Sound AA240 User Manual

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: [phone] / FAX [phone]

© 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: [phone] / FAX [phone]

© 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

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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: [phone] / FAX [phone]

© 2006 Atlas Sound Printed in U.S.A. ATS002450 RevA 10/06 SL5-2092

AtlasSound.com

317