JMI Vox Mk I, Mk II and Mk III Six Channel Mixer Units (1964-1968)

Four Images Above: Vox Mk III Six Channel Mixer Unit

Vox Mk III Mixer Unit (1965 - 1968) - Introduced at the London Music Trade Fair in the summer of 1965, the Vox Mk III Mixer Unit (pictured above) was Vox's third iteration and best selling compact audio mixer. The "Model 156 - Mark III Mixer Unit" utilized a battery powered, solid state circuit that featured a total of six channels with ¼" inputs. The first five of these channels were labeled "Hi-Gain" for microphones. The sixth channel was labeled "Audio" for line level inputs such as a tape recorder or record player. One set of bass and treble controls offered overall tone adjustment.

The circuitry was of a modular design, with five identical circuit printed circuit boards powering the "Hi Gain" input channels and a sixth board for the "Audio" line level input channel and audio "Output" jack. The Mk III Mixer Unit was housed in a folded
Vox Mk I Six Channel Mixer Unit steel enclosure finished in gray hammertone paint. A single strap handle was mounted to the top of the enclosure. The handle shown in the photos above is a non-original replacement. Dimensions: 15" x 5" x 6"

Vox Mk I and Mk II Mixer Units (1964 - 1965) - The Vox Mk III Mixer unit was preceded by the Vox Mk I (shown at left) and Mk II Mixer Units, both introduced in 1964. Each featured battery powered solid state circuitry and featured six channels, but unlike the Mark III, just three channels were allocated for high gain (microphone) level and the remaining three for low-gain (line) level. The Mk II Mixer Unit added a treble and bass control for overall tone adjustment. Both the Mk I and Mk II Mixer Units were housed in a vinyl covered cabinet with a removable lid to protect the front panel in transit. Dimensions: Vox Mk I Mixer Unit: 13" x 5" x 6", Vox Mk II Mixer Unit: 15" x 5" x 6".


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Photos and editorial content courtesy Gary Hahlbeck, North Coast Music

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