Atlas Sound AA120M - Manual

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TS004329 RevA 5/12

1601 JACK MCKAY BLVD.

ENNIS, TEXAS 75119 U.S.A.

AA-ML

Optional Mic/Line Input Module For AA Series Model AA120M

The AA-ML is an accessory input module for the AA120M. When inserted into the AA120M it can used as an additional Line or Mic input. It features
a level control, RCA summing jacks for line level signals, Phoenix style input for mic level signals, defeatable 18V phantom power supply, remote VCA
level control, and a speech filter with high pass 300Hz @ 6dB (only functional in mic position).

Installation

1. Disconnect the amp from the AC power source.

2. Remove cover from Input 6.

3. Select Input 6 Dipswitch #5 setting. Refer to the AA120M owner's manual on page 8 for information on proper setting. For the AA-ML, we

suggest the Mix Bus position.

4. Decide on the function of the module.

a. For Line input, place jumpers on the AA-ML to the "AUX" pins (see drawing below). Set mic phantom pins to "OFF" and speech filter pins to "OFF".

b. For Mic input, place jumpers on the AA-ML to the "Mic" pins (see drawing below). Decide if you need phantom power for the mic and set

the jumper accordingly. Decide if you need speech filter and set the jumper accordingly.

Note: Speech filter only affects mic input.

5. Insert module into card slot. Secure with two screws.

6. Adjust module output level to Input 6. You will need to calibrate the module level, input 6 level, and master level for proper operation.

7. Remote Level Operation can be accomplished by using the AAVC-10K accessory. Connect the 2 wires of the AAVC-10K to the Phoenix

connector on the amp labeled VCA.

Note: There is no polarity to the wiring.

8. Refer to the owner’s manual of the amplifier and the AAVC-10K instructions for proper settings.

Specifications:

Microphone Input:

600

Ω

Balanced

Sensitivity:

3mV

Line Input:

10K

Ω

Unbalanced

Sensitivity:

300mV

Microphone/Line Switch:

(PCB Jumper)

Mic Input Phantom Power:

+18(PCB Jumper)

Mic Low-Cut Filter:

-10dB at 100Hz (PCB Jumper)

Output Level Control:

Front Panel Screwdriver Adjust

Remote Volume Control Mic and Line:

10K

Ω

Terminations:

Mic Input = Phoenix terminals, Remote Volume = Phoenix terminals, Line/AUX = Dual RCA Summing Jacks

Illustration 1: Jumper Locations

LEVEL

AA-ML

COM HOT _

LINE IN

L

R

+

G

MIC

REM

VOL

MIC PHANTOM

OFF ON

SPEECH FILTER

OFF

ON

AUX

MIC

AA-ML

C10

C11

C13

C14

C18

C2

C20

C21

C25

C3

C4

C5

C6

C8

C1

C12

C15

C16

C17

C19

C23

C7

C9

J1

D1

SW1

SW2

SW3

U1

J3

R1

R10

R14

R15

R16

R17

R18

R2

R20

R21

R22

R24

R25

R26

R27

R28

R3

R32

R33

R34

R4

R5

R6

R7

R8

R9

U2

C22

R12

R11

R31

R29

R30

R13

R19

JP3

JP2

JP4

JP5

JP1

MIC PHANTOM

SPEECH FILTER

LINE/MIC SELECT

Mic Phatntom

LINE/MIC Select
Speech Filter