CMA 10-2D
CMA 10-2D 1972 long amplifier chassis design.
CMA 10-2DL short chassis design becomes discotheques standard mixer.
When Bozak relocated to Florida in 1988 and became TAI most schematics were lost due to the expensive move. Buzzy Beck was the only one who valued and retained most of the electronic prints.
Even though many of the original schematics are becoming worn and faded a rare copy of the CMA 10-2D as seen here remains. It shows the monitor circuit ic chip and footnote for Cue Level gain.
Long before any other mixer company and something very few people are aware of, Bozak was the first to experiment with ic chips. The CMA 10-2 series mixer output remained analog and only the Monitor output circuit was designed and tested with ic chips. The CMA 10-2DL went to a more powerful TTL circuit to accommodate the use of 8 ohm headphones. Many CMA 10-2 series mixers are found with the ic
The 2 piece CMA 10-2D power supply cards were incorporated into a single card for the CMA 10-2DL mixer.
The CMA 10-2D used mono channel Summing and mono channel Tone cards.
The CMA 10-2DL incorporated the left and right channels to 1 stereo card.
These are the boards used in CMA 10-2 series mixers. The CMA 10-2D used the original 10 channel board that was physically cut down to make stereo channels for the D mixer.
The CMA 10-2D mixer used 2 mono phono cards and 2 board channels to create 1 stereo input. The CMA 10-2DL is a stereo card that uses 1 board stereo designed channel for the input.
There is a difference in phono sound reproduction when using the CMA 10-2D mixer that depends on built dates and what phono cards are installed. The A603C card on the left usually found in the mixers is the Chou Morris Associates designed phono card. The A603D card on the right is the in house designed D phono card that made the Bozak mixer sound famous. The first produced long chassis D mixers p
The New A603D phono cards were designed for audiophile stereo cartridges including Pickering, Empire, Shure etc. They were installed in the last produced CMA 10-2D mixers and the sound difference was noticed. Older CMA electronics were modified for many in-house mixer designs, but the newly designed phono stage was responsible for Bozak’s popularity of turntable use. This 1974 in-house phono