Bozak CMA-10 (1970s)
Documentation on the Bozak CMA-10 is thin. What survives comes from a handful of period directory listings and a brief product announcement. The CMA-10 appears to have been a rack-mountable stereo mixer/preamplifier aimed at professional users - live sound, broadcast, and installed systems.
Recording Engineer (June 1972, p.30) announced the CMA-10-2D as a “simplified but versatile unit” for professional audio. Outputs were two-channel line, rated at +18dBm or 6V into 600 ohms unbalanced per channel. The same brief noted that the mixer could be used with Bozak’s A-1002C input card and CMA-481 input transformer, suggesting a modular or expandable architecture.
By 1984, the model had evolved into the CMA-10-2D1 Series II. It carried a list price of $499, came rack-mountable in a 19″W × 8¼″H chassis, and included set level indicators for all inputs and main outputs.
Beyond these directory entries, almost nothing else is recorded. No service manuals, reviews, or user reports have surfaced in the usual archives. The CMA-10 line clearly had a run of at least a dozen years, from the early 1970s announcement into the mid-1980s, with at least two revisions (the -2D and the -2D1 Series II). It sat alongside Bozak’s CMA-2-80 amplifiers and CM-109 series modules in the company’s professional audio lineup. The details of its circuit design, channel count, and real-world use remain undocumented.
- Type: Stereo mixer/preamplifier (professional)
- Output: +18dBm or 6V into 600 ohms unbalanced (per channel)
- Chassis: 19″W × 8¼″H, rack-mountable
- Indicators: Set level indicators for all inputs and main outputs
- Price (1984): $499
- Variants documented: CMA-10-2D (c.1972), CMA-10-2D1 Series II (c.1984)
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