SKU: 8110-0030


4 Channel, Analog Audio Monitor. 1RU.
Data Sheet

Data Sheet



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    The VMQ-4 audio monitor from Wohler Technologies offers voice quality confidence monitoring of up to 4 analog channels simultaneously. It is a compact 1U unit at a very cost effective price.

    Because each channel has its own dedicated power amplifier and speaker, the audio sources remain completely separate from input to output. When listening within ultra near field distances of 1 to 3 feet, these discrete speaker outputs provide enhanced source distinction when compared to designs with four inputs mixed into a single output. Each channel has an LED which illuminates when a signal is present at the input allowing the operator to easily determine at a glance which channels are currently active, very helpful when quick volume adjustments are required. Separate mute buttons are provided for each channel; these together with an LED that indicates channel muting allow an operator to quickly mute one or more channels. A stereo headphone jack has Channels 1 and 2 summed on the left side, and Channels 3 and 4 on the right side.

    The VMQ-4 is completely magnetically shielded to allow interference-free operation immediately adjacent to all CRT video monitors.

    Features & Benefits

    • Mute button and LED for each channel
    • Space saving 1RU
    • Dedicated Input for each output channel
    • Powerful 94dB SPL at 2 feet (0.6m)
    • 4 balanced analog inputs
    • Signal present LED on each channel input
    • Headphone jack mutes speakers
    • Blowout-proof speakers
    • Monitoring of 4 discrete audio channels in 1 unit
    • Thorough magnetic shielding for placement next to video monitors
    • Quick and simple installation


    Dimensions (W x H x D) 1RU in standard 19” rack: 19” x 1.75” x 9.7” (483 mm x 45 mm x 247 mm). Shipping dims: 23”x 6”x 12”
    Shipping Weight / Net Weight 10.0 lbs. (4.6 kg) / 10.0 lbs. (4.6 kg)
    Power Consumption / Supply 20 Watts Avg/30 Watts Max, Internal IEC Connector, 100 to 240 VAC ± 10%, 50-60 Hz, CE & UL approved
    Audio Channels 4 Channels
    Hum and Noise Better than -70 dB below full output
    Peak Acoustic Output 94 dB SPL @ 2 feet
    Speaker Power Output 20W RMS per side, 35W Peak
    Frequency Response 300 Hz – 16 kHz ± 9 dB
    Analog Input Impedance
    >100 kOhms balanced; >50 kOhms unbalanced