Wohler AMP1-DA/106 AES/EBU/SDI Audio Monitor

The AMP1-DA/106 from Wohler provides self-powered, full-fidelity stereo audio monitoring of 2 channels from analog as well as AES/EBU Digital sources, plus ultra-high resolution LEDs with 106 segments, all in the smallest rack space possible. It includes 4 integrated high-performance transducers driven by 3 power amplifiers, with one amplifier/driver combination handling midrange and high frequency information in stereo, while the second handles summed low-frequency information below the 500 Hz crossover point.

In an ultra near field (1 to 3ft) working environment, its unique design provides optimally focused sound for operators and offers performance comparable to that of many separate monitor pairs, yet minimizing installation hassles, awkward speaker placements, and "added-on" look. For the operator, this allows for a higher SPL, while reducing overall ambient sound and adjacent bay crosstalk.

It comes with a choice of BBC, DIN, Nordic, and VU scales, with PPM Only level meters.

Extended HF response uncovers potential audio, hiss, or whine problems. Electronic—as opposed to acoustic—cancellation of bass frequencies provides positive audible detection of reversed polarity (out-of-phase) audio feeds. A headphone jack which automatically mutes the speakers when in use is provided on the front panel.

An integrated output limiter circuit protects the speakers, and extensive magnetic shielding gives the option of physical placement immediately adjacent to video monitors with no color impurities.

The unique tri-color LED design means that an almost unlimited variety of options such as phase correlation, peak hold, and alternate scales can be offered. The standard display mode is set as a single segment PPM "dot" above a VU bar, with each segment's color being fixed according to its scale position. DIP switches provide level calibration settings to select one of 4 different calibration levels.

You'll find the AMP1-DA/106 ideally suited for use in VTR bays, mobile production vehicles, teleconferencing installations, multimedia systems, satellite link and cable TV facilities, as well as on-air radio studios.

Wohler AMP1-DA/106 Features:

• Full fidelity audio monitor in only 1RU
• (2) unbalanced AES/EBU digial inputs (selectable)
• (2) balanced analog inputs (1 stereo)
• Balanced analog output of selected source

Wohler AMP1-DA/106 Specifications:

• Wohler Part Number: 8101-0020
• Signal Types/Interfaces:
  • Signal Inputs Accepted:
    • Analog
    • AES
  • Monitoring Outputs Available:
    • Speakers
    • Headphones
    • Level Meters
  • Signal Inputs: 2 Balanced Analog Inputs on XLR; 2 Unbalanced AES Input Pairs on BNC
  • Signal Outputs: 2 Balanced Analog Outputs from Selected Source on XLR
• Other Features (1): Alternate scales, color mappings and features such as phase correlation or sum & difference may be specified at the time of order
• Other Features (2): Separate channel volume controls and different input and output connector types.
• Audio:
  • AES/EBU Input Termination: 75 Ohms unbalanced
  • AES/EBU Input Sampling Rate: 32-48 kHz, auto-detecting
  • Aural Sound Outputs: Wohler Speaker System; headphone use mutes speakers
  • Acoustic Distortion: 8% or less at worst case frequencies above 180 Hz including cabinet resonance, typically < 2%
  • Electrical Distortion:
  • Frequency Response (1/6 octave): 80 Hz - 16 kHz (+ or -7 dB); (-10 dB @ 50 Hz, 22 kHz)
  • Peak Acoustic Output @ 2 feet: 98 dB SPL
  • Hum and Noise: Better than -68 dB below full output
  • Power Output: RMS Each Side: 10W Transient/5W Continuous; RMS Bass: 20W Transient/10W Continuous
  • Level Meters: 2 x 106 Segments (Horizontal)
  • Level Meter Threshold: 0, +4, +6, +8 dBv (='0'), DIP selectable; Factory setting is +4 dBv
  • Level Meter Scale: +16 to -56 dB
  • Level Meter Dynamics: Simultaneous VU & PPM
  • Level Meter Resolution: 0.5 dB
• Video:
  • Number of Video Displays: 0
• Physical:
  • Rack Height: 1RU
  • Weight:14.0 lbs (6.4 kg)
  • Dimensions: 1.75" x 19" x 12" (44.5 x 483 x 298mm)
• Power
  • Power Consumption: 35W