User manual

AMP1-DA User Manual P/N 821530 Rev-C
© 2006 Wohler Technologies Inc. ALL rights reserved
4
Applications
Features
The AMP1 Digital series of audio monitors provides self-powered, full-fidelity stereo monitoring in the smallest rack space
possible. All models contain four high performance transducers driven by three power amplifiers: two amplifier/driver combinations
handle midrange and high frequency information in stereo, while the third center channel reproduces information below the 500 Hz
crossover point.
All AMP1 Digital models come equipped with a ganged stereo volume control and balance pot, power indication LED, and
headphone output. Output limiter circuits are incorporated to protect the speakers, and extensive magnetic shielding allows
placement immediately adjacent to video monitors without causing display interference.
The AMP1-DA model features two selectable AES input sources on unbalanced BNC connectors and a stereo analog input source
on two balanced XLR connectors. A toggle switch on the front panel allows selection of AES source 1 or 2 while another toggle
switch selects between the selected AES digital source and the analog source inputs. A red LED indicates the presence and error
status of the selected AES signal entering the unit.
Two high-resolution 26-segment tri-color LED bargraph level meters display the audio levels for the left and right selected sources
and our proprietary three-LED stereo phase indication feature allows monitoring of phase relationships of the selected stereo inputs.
An additional pair of XLR connectors are provided on the rear panel for outputing an analog signal of the selected sources for
connecting to downstream equipment.
AMP1-DAMP1-D
AMP1-DAMP1-D
AMP1-D
AA
AA
A
1U Digital/Analog Audio Stereo Speaker Monitor
Description
Section 1: General Features and Specifications
• 98 dB SPL at two feet
• Only one rack space high
• Audible and visual indication of phase/polarity problems
• Thorough magnetic shielding for placement next to video monitors
• Two selectable AES/EBU inputs on unbalanced BNC connectors
• Analog stereo inputs on two balanced XLR connectors
• Analog output of selected input on two balanced XLR connectors
• AES input signal status indication LED
• AES source selection via front panel toggle switch
• Digital/analog source selection via front panel toggle switch
• Headphone output
• Power indication LED
• Two 26-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 PPM Ballistics (Type I, Type II, DIN 45406, or SSRT)
• Selectable alternate Bargraph Scales (AES, Extended VU,
Alternative AES, VU, BBC, NORDIC, and DIN)
The AMP1 Digital series is ideally suited for use in VTR bays, mobile production vehicles, teleconferencing installations,
multimedia systems, satellite links and cable TV facilities, and on-air radio studios. Designed and manufactured in the U.S., the
AMP1-DA is backed by a strong warranty and a satisfaction guaranteed return policy.
AMP1-DA Front Panel
DIGITAL AUDIO
AMP1-DA
WOHLER
TECHNOLOGIES
MONITOR PANEL
POWER
AES
AES1
AES2
ANALOG
DIGITAL
+
AVG
12
SOURCE