Bang & Olufsen MMC-1

The MMC-1 was Bang & Olufsen's top fixed-coil phono cartridge of the early 1980s. It was a moving-iron pickup with a single-crystal sapphire tube cantilever and a nude diamond contact-line stylus. Audio (August 1983, p.76) published a full Equipment Profile and recorded a frequency response of 20 Hz to 20 kHz ±1 dB, channel separation greater than 30 dB at 1 kHz, and an output voltage above 0.6 mV/cm/S. Recommended tracking force was a light 1 gram. Effective tip mass measured 0.25 mg, and compliance was rated at 30 × 10⁻⁶ cm/dyne.

The same review noted that the MMC-1's low-impedance coils spared it the stringent loading requirements of many phono cartridges of the period (Audio, August 1983, p.78). High Fidelity (April 1983, p.24) described the MMC-1 as a "fixed-coil phono pickup with sapphire-tube cantilever and multiradial stylus," and paired it with the Beogram 8002 linear-tracking turntable as part of B&O's integrated system approach. The cartridge plugged directly into the tonearm, so it needed no separate headshell.

Beyond period equipment reports and its role as the premium match for B&O's tangential-tracking turntables, little is formally documented about production runs or retail pricing.