© 2004 Wohler Technologies Inc. ALL rights reserved
4
AMP2-VSDA/AV
and
AMP2-VSDA/AM
User Manual P/N
821576
Rev-
B
Features
AMP2-VSDA/AV
and
AMP2-VSDA/AM
Powered Audio Monitors
Description
Section 1:
Features, Specs, and Installation
AMP2-VSDA/AM Series Front Panel
The
AMP2-VSDA/AV
and
AMP2-VSDA/AM
are exceptionally high quality stereo audio monitoring systems in compact, two
rackspace cabinets. All
AMP2 Series
units contain three audiophile-quality drivers and three power amplifiers; two amplifiers
(and two speakers) that reproduce midrange and high frequency information in stereo, and a third amp/driver combination (and
speaker) that handles summed Low Frequency (LF) information below the 500 Hz crossover point. The
AMP2 Series
unique
audio design has two important advantages. First, it provides optimally focused sound in an Ultra Near Field
tm
(1 to 3 feet)
environment. This allows higher SPL for the operator while reducing overall ambient sound and adjacent bay crosstalk. Second,
electronic rather than acoustic cancellation of bass frequencies provides positive audible detection of reversed polarity (“out of
phase”) audio feeds. A unique LED display also visually shows “phase” (polarity) relationships of the signals selected for
monitoring.
The
AMP2-VSDA/AV
model features mechanical meters with
VU
ballistics characteristics and the
AMP2-VSDA/AM
model
features these meters with
PPM
ballistic characteristics. A toggle switch on the front panel allows selection between
SDI
or
AES
input sources. Two banks of four buttons on the front panel are used to independently assign from one to to four (summed)
channels to each of the two (left and right) speaker channels.
AES
signal status is indicated by two bi-color (RED/GREEN) LEDs,
while
SDI
signal status is indicated by one bi-color (RED/GREEN) LED.
The rear panel features an
SDI
input and loop-through on BNC connectors, two
AES
inputs on unbalanced BNC connectors, two
alternate
AES
inputs on balanced XLR connectors, two
AES
outputs (converted from the
SDI
input) on BNC connectors, four
Analog
outputs (of the selected digital source) on balanced Phoenix connectors, a stereo analog output of the two channels
assigned to the left and right speakers on two balanced XLR connectors, and four analog inputs on XLR connectors with a switch
on the front panel for selecting between the selected digital (
AES
or
SDI
) and the
Analog
inputs.
Wohler Technologies proprietary three-LED stereo phase indication feature allows visual monitoring of phase relationships of the
sources selected for monitoring through the speakers.
• Four analog outputs (from selected digital source) on balanced
Phoenix connectors
• Stereo analog output of the channels monitored by the left and
right speakers on two balanced XLR connectors
• Independantly assign and sum together two, three, or four
channels of the selected source to left and right speakers via
two banks of four button switches on the front panel
• Select AES or SDI input source via a front panel toggle switch
• Select analog or selected digital input source via a front panel
toggle switch
• One SDI signal status/error indication LED
• Two AES signal status/error indication LEDs
• Headphone output
• Power indication LED
• 104 dB SPL at two feet
• Only two rack spaces high
• Excellent high frequency response for positive detection of
background whine and noise
• Audible and visual indication of phase/polarity problems
• Thorough magnetic shielding for placement next to video
monitors
• Choice of either VU or PPM high quality mechanical level meters
• SDI input and loop-through on unbalanced BNC connectors
• Two AES/EBU inputs on unbalanced BNC connectors
• Two alternate AES/EBU inputs on balanced XLR connectors
• Four analog inputs on balanced XLR connectors
• Two AES outputs (converted from SDI input) on unbalanced BNC connectors
