© 2004 Wohler Technologies Inc. ALL rights reserved
4
AMP2A-VTR
and
AMP2A-VTR2
User Manual P/N
821580
REV-
B
Features
AMP2A-VTR and AMP2A-VTR2
Description
Section 1:
General Features and Specifications
AMP2A-VTR2 Front Panel
2U Stereo Audio Speaker Monitors
AMP2A-VTR Front Panel
The
AMP2A-VTR
and
AMP2A-VTR2
are audio monitors capable of audibly monitoring up to four Analog source channels
through an internal stereo speaker system while simultaneously visually monitoring all four channels of the selected source via four
high-resolution 53-segment LED bargraph level meters. Two banks of four buttons on the front panel are used to independently
assign from one to four (summed) channels to each of the two (left and right) speaker channels. Features for these two models
include a ganged stereo volume control and balance pot, power indication LED, headphone output, and a stereo analog output on
two balanced XLR connectors of the channels assigned to the left and right speaker channels. Output limiter circuits are
incorporated to protect the speakers, and extensive magnetic shielding allows placement immediately adjacent to video monitors
with no color impurities. Wohler Technologies proprietary three-LED stereo phase indication feature allows monitoring of phase
relationships of the selected channels assigned to the left and right speaker channels. The four 53-segment LED bargraph level
meters offer selectable Input Reference Level, Display Mode, Peak Hold, Ballistics, Phase Correlation, and alternate scales.
The
AMP2A-VTR
rear panel features Analog inputs on four balanced Phoenix connectors. The
AMP2A-VTR2
rear panel features
two banks of four Analog inputs (eight total) on balanced Phoenix connectors and a front panel toggle switch for choosing between
the two banks of four inputs.
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.
• Two banks of four push buttons for assigning single or
summed channels to the left and right speakers
• Digital/analog source selection via front panel toggle switch
• Headphone output
• Power indication LED
• AMP2A-VTR: Analog audio inputs on four balanced
Phoenix connectors
• AMP2A-VTR2: Analog audio inputs on two banks of four
balanced Phoenix connectors with front panel toggle switch
• Analog outputs of source selected for speaker monitoring
on two balanced XLR connectors
• 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
• Four 53-segment high-resolution tri-color bargraph level meters:
-
Selectable Input Referrence Level (0, +4, +6, or +8 dBu)
-Selectable Display Mode (VU Only, VU/PPM, or PPM Only)
-Selectable Peak Hold (Manual, 3-Second, 10-Second, or Off)
-Selectable Ballistics (Type I, Type II, DIN 45406, or SSRT)
-Selectable alternate Bargraph Scales (AES, Extended VU,
Alternative AES, VU, BBC, NORDIC, and DIN)
-Selectable Phase Correlation feature
