Rear Panel Features - Wohler AMP1A-4S User Manual

AMP1A-4S/-10S/-LP4S/-LP10S User Manual P/N 821527 Rev-B
Please refer to Figure-2b on the following page to familiarize yourself with the rear panel features of the AMP1A Series units. The
following sections describe these features and are referenced, by letter, to Figure-2b.
A Power - IEC-320 Connector
Attach a standard IEC-320 power cord between this connector and mains power (100 - 250VAC, 50/60 Hz). The front panel power
LED (Item 4, page 8) will glow GREEN to indicate operating voltages are present.
B Balanced Inputs (Channels 1-4) - 3-Pin Male Phoenix
(AMA1A-4S and ANAP1A-LP4S Only)
These balanced (40K Ω) 3-pin Phoenix connectors (left and right) accept standard analog audio signals. The two banks of
inputs, Channel A (Left) and Channel B (Right), are comprised of four connectors each for a total of eight inputs (four stereo
pairs). Connector pinout information is silk-screened on the rear panel above each connector.
C Balanced Inputs (Channels 1-10) - 3-Pin Male Phoenix
(AMA1A-10S and ANAP1A-LP10S Only)
These balanced (90K Ω) 3-pin Phoenix connectors (left and right) accept standard analog audio signals. The two banks of
inputs, Channel A (Left) and Channel B (Right), are comprised of ten connectors each for a total of twenty inputs (ten stereo
pairs). Connector pinout information is silk-screened on the rear panel between the two rows of connectors.
D Selected Outputs - 3-Pin Male XLR
These two 3-pin male XLR connectors are analog outputs of the audio source as selected by the Source Select Switch on the
front panel (Item 6, page 8). The output is not affected by the volume/balance controls or headphone mute. See below for XLR
connector pinout information.
10

Rear Panel Features

Pin-1
Gnd
(Shield)
Pin-3
Low (-)
Male XLR Pinout
© 2006 Wohler Technologies Inc. ALL rights reserved
Pin-2
High (+)
Section 2: Operation