© 2004 Wohler Technologies Inc. ALL rights reserved
4
AMP2-SDA/AVU
and
AMP2-SDA/APP
User Manual P/N
821576
Rev-
A
Features
AMP2-SDA/AVU
and
AMP2-SDA/APP
Powered Audio Monitors
Description
Section 1:
Features, Specs, and Installation
AMP2-SDA/AVU or /APP Front Panel
The
AMP2-SDA/AVU
and
AMP2-SDA/APP
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-SDA/AVU
model features mechanical meters with
VU
ballistics characteristics and the
AMP2-SDA/APP
model
features these meters with
PPM
ballistic characteristics. Toggle switches on the front panel allow selection of
SDI
or
AES
input
sources,
SDI subgroup 1
or
2
(channels
1/2
or
3/4
), and a choice of the selected
digital
source or the
analog
source inputs. Two LEDs
indicate the presence and error status of the selected
AES
and/or
SDI
signals entering the unit.
The rear panel features an
SDI
input and loop-through on BNC connectors, an
AES
input on an unbalanced BNC connector, an
AES
output (converted from the
SDI
input) on a BNC connector,
analog
inputs on two balanced XLR connectors, and a stereo analog
output of the
selected digital source
on two XLR connectors.
Wohler Technologies proprietary three-LED stereo phase indication feature allows visual monitoring of phase relationships of the
sources selected for monitoring through the speakers.
• Select analog or selected digital input source via a front panel
toggle switch
• Select AES or SDI input source via a front panel toggle switch
• Select SDI subgroup 1 or 2 (of Group I.D. #1) source via
front panel toggle switch
• SDI signal status/error indication LED
• AES signal status/error indication LED
• Headphone output
• Power indication LED
• Numerous control and input options
• Quick and easy installation: simply slide in the rack and
connect audio and AC power
• 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
• AES/EBU input on unbalanced BNC connector
• AES/EBU output (from SDI input) on BNC connector
• Analog inputs on two balanced XLR connectors
• Stereo analog output of the selected digital source
