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2-channel SDI and AES audio monitor with metering that selects between the first 2 subgroups of an SDI input or an AES input pair.
Product Description

The AMPx-SDA Series monitors are complete exceptionally high-quality stereo audio monitoring systems for monitoring 2 channels from analog, AES/EBU digital and SDI sources in a compact one or two rack space cabinet.

The AMPx-SDA features two high-resolution tri-color LED level meters showing simultaneous VU and PPM for superior level-metering. The front panel features an innovative LED display of phase/polarity relationships. Output limiter circuits protect the speakers, and extensive magnetic shielding allows placement immediately adjacent to video monitors with no color impurities.

These unique designs provide optimally focused sound for operators in an ultra near field (1 to 3 ft.) working environment and offers performance comparable to that of many separate monitor pairs, yet does so without the installation hassles, awkward speaker placements and "added-on" look. This provides for a higher SPL for the operator while reducing overall ambient sound and adjacent bay crosstalk. Extended HF response reveals potential problems with audio whine or hiss. Electronic rather than acoustic cancellation of bass frequencies provides positive audible detection of out-of-phase (reversed polarity) audio feeds. A headphone jack is provided on the front panel, usage automatically mutes the speakers.

The AMPx-SDA Series monitors are ideally suited for use in VTR bays, mobile production vehicles, teleconferencing installations, multimedia systems, satellite link and cable TV facilities, and on-air radio studios.


  • Extended frequency response and low distortion
  • Demuxing of either sub-group of SDI Group 1 to 1 AES/EBU output
  • Accepts analog, AES/EBU, and SD-SDI signals
  • Dual tri-color level meters show VU and PPM simultaneously

List Price: Consult your local dealer.
End of Life, Not available for purchase
Product Information:


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Wohler Part Number:8103-0040
Signal Inputs Accepted:   
Monitoring Outputs Available:    
Signal Inputs:2 Balanced Analog Inputs on XLR; 1 Balanced AES Input Pair on BNC; 1 SD-SDI Input on BNC
Signal Outputs:2 Balanced Analog Outputs from AES or SDI on XLR; 1 Unbalanced AES Output Pair from SDI on BNC; 1 SD-SDI Reclocked Output on BNC
AES/EBU Input Termination:75 Ohms unbalanced
AES/EBU Input Sampling Rate:32-48 kHz, auto-detecting
SDI Input Termination:75 Ohms unbalanced
Aural Sound Outputs:Wohler Speaker System;Headphone, Mutes Speakers
Acoustic Distortion:8% or less at worst case frequencies above 180 Hz including cabinet resonance, typically < 2%
Electrical Distortion:<0.15% at any level below limit threshold
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 26 Segment (Vertical)
Level Meter Threshold:0, +4, +6, +8 dBv(='0'), DIP selectable; Factory setting is +4 dB
Level Meter Scale:+16 to -50 dB
Level Meter Dynamics:VU with PPM or Peak Hold (Select)
Level Meter Resolution:2 dB
# of Video Displays:0
Rack Height:1RU
Weight:14.0 lbs (6.4 kg)
Shipping Weight:14.0 lbs (6.4 kg)
Dimensions:1.75x19x12" (45x483x305mm)
Power Consumption:35W
Rear Panel
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Block Diagram
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