Wohler AMP2-VSDA 4-Channel Audio Monitor

Wohler AMP2-VSDA 4-Channel Audio Monitor

Wohler AMP2-VSDA 4-Channel Audio Monitor

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Wohler AMP2-VSDA overview

  • 1Description

The AMP2-VSDA 4-Channel Audio Monitor from Wohler Technologies provides self-powered, full fidelity stereo audio monitoring. This unit features 4 LED level meters showing simultaneous VU and PPM for accurate level-metering of all 4 input sources from the selected input group. The audio monitor contains high performance transducers driven by 3 power amplifiers: 1 amplifier/driver combination handles midrange and high frequency information, while the second handles summed low frequency information below the 500 Hz crossover point.

The unique design provides optimally focused sound for operators in an ultra near field of 1 to 3' (0.6 to 0.9m) working environment and offers performance comparable to that of many separate monitor pairs. 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, and its usage automatically mutes the speakers. The front panel features an innovative LED display of phase/polarity relationships. Output limiter circuits are incorporated to protect the speakers, and extensive magnetic shielding allows placement immediately adjacent to video monitors with no color impurities. This monitor is suitable for VTR bays, mobile production vehicles, teleconferencing installations, multimedia systems, satellite link and cable TV facilities, and on-air radio studios.

Tri-color level meters displaying simultaneous VU and PPM
Eight balanced analog inputs
Independent selection of 2 from 4 mono sources to left and right outputs
Balanced analog output of 2 selected sources
Innovative LED display of phase/polarity relationships
Blowout-proof speakers
High quality drivers and power amplifiers provide accurate reproduction
Focused sound reduces adjacent bay crosstalk
Thorough magnetic shielding for placement next to video monitors
Extended frequency response and low distortion
Audible indication of phase/polarity problems
Full fidelity audio monitoring
In the Box
Wohler AMP2-VSDA 4-Channel Audio Monitor
  • AC Power Cord
  • Limited 1-Year Warranty on Parts & Labor
  • Note: The warranty can be automatically extended, for audio products only, to a 24 month warranty by registering the serial number of your product online at Wohler's website within 6 months of shipment.

    Table of Contents
    • 1Description

    Wohler AMP2-VSDA specs

    Input 4 x Analog (XLR)
    2 x AES (BNC)
    2 x AES (XLR)
    1 x SDI (BNC)
    Output 2 x Analog audio on XLR (left & right)
    2 x AES out from SDI (BNC)
    4 x Analog out from selected digital source (Phoenix)
    1 x SDI Re-clocked (BNC)
    Termination AES/EBU Input Termination
    Balanced: 110 Ω
    Unbalanced: 75 Ω

    SDI Input Termination
    Unbalanced: 75 Ω
    Sampling Rate 32 to 48 kHz, auto-detecting
    Level Meters 4 x 53 Segment
    Level Meter Scale 15 to -50 dB
    Level Meter Dynamics Simultaneous VU & PPM
    Level Meter Threshold 0, +4, +6, +8 dBv(=0), DIP selectable

    Factory setting is +4 d

    Level Meter Resolution 1 dB
    Aural Sound Outputs Wohler speaker system, headphone, mute speakers
    Frequency Response 1/6 Octave 80 Hz to 16 kHz (±5 dB) (-10 dB @ 40 Hz, 20 kHz)
    Analog Input Impedance XLR: 70 kΩ balanced
    Distortion Acoustic Distortion: 6% or less worst case frequencies above 180 Hz including cabinet resonance, typically < 1.5%
    Electrical Distortion: <0.15% at any level below limit threshold
    Peak Acoustic Output at 2 feet 104 dB SPL
    Hum and Noise Better than -68 dB below full output
    Power Output For RMS Each Side
    Transient: 14 W
    Continuous: 10 W

    For RMS Bass
    Transient: 35 W
    Continuous: 25 W
    Power Consumption 45 W
    Space requirements 2 RU
    Dimensions 3.5 x 19.0 x 12.0" (89.0 x 483.0 x 305.0 mm)
    Weight 18.0 lb (8.2 kg)

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