Rear Panel Features - Wohler AMP2A-VTR User Manual

AMP2A-VTR and AMP2A-VTR2 User Manual P/N 821580 REV-B
Please refer to Figure-2b on the following page to familiarize yourself with the rear panel features of the AMP2A-VTR and AMP2A-VTR2
units. The following sections describe these features and are referenced, by letter, to Figure-2b.
A
Power 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 2, page 8) will glow GREEN to indicate operating voltages are present.
B
Analog Input Connectors (AMP2A-VTR)
These 3-pin male Phoenix connectors (INPUTS, 1-4) accept standard analog audio signals and are configured for balanced 90K Ω
connections. Channel input numbers are silk-screened above the connectors (1, 2, 3, 4) and correspond to the numbers available
for selection by the left and right Speaker Assign Channel Buttons on the front panel (Item 6, page 8).
Connector pinout information is silk-screened just above each input connector.
C
Analog Input Connectors (AMP2A-VTR2)
These 3-pin male Phoenix connectors (INPUTS, CHANNEL 1-4, GROUP 1-2) accept standard analog audio signals and are
configured for balanced 90K Ω connections. The two banks (groups) of input connectors are interleaved and either group of
four inputs (GROUP 1 or GROUP 2) may be selected for monitoring using the 2-position Group Select Switch on the front
panel (Item 10, page 10). Channel input numbers are silk-screened above the connectors (CHANNEL 1, 2, 3, 4) and correspond
to the numbers available for selection by the left and right Speaker Assign Channel Buttons on the front panel (Item 6, page 8).
Connector pinout information is silk-screened just above each connector.
D
Selected Output Connectors
These two 3-pin male XLR connectors are analog outputs of the Analog Input Connectors (Item B or C) as selected by the left
and right Speaker Assign Channel Buttons (Item 6, page 8) and Group Select Switch (Item 10, page 10) on the front panel.
The left connector outputs the left channel (CHAN. A (L)) and the right connector outputs the right channel (CHAN. A (L)). Both
connectors are configured for low impedance connections and the output signals are not affected by the volume/balance controls or
headphone mute. For XLR connector pinout information see the diagram below.
12

Rear Panel Features

Pin-1
Gnd
(Shield)
Pin-3
Low (-)
Male XLR Pinout
© 2004 Wohler Technologies Inc. ALL rights reserved
Pin-2
High (+)
Section 2: Operation