Sony C-500

A studio condenser microphone that Sony's own advertising claimed could out-measure every other piece of gear in the room.

Overview

The Sony C-500 is a studio-standard condenser microphone. The best documentation of it is not a spec sheet but Sony's own period advertising. Across 1970 and 1971 the company ran a recurring two-part spread - one column for the C-500, one for the ECM-377 - under the boast that the C-500 was "the only studio microphone able to surpass the technical capabilities of all other equipment in today's advanced recording studios." That is marketing copy, and it should be read as such. The number Sony attached to it is the interesting part: a dynamic range in excess of 130 dB. DB Magazine (November 1970, p.17) carried that same 130 dB claim, and the ad copy tied it directly to the microphone's ability to stay clean at the extremes.

The C-500 belongs to Sony's C-series condenser line. The period record places it alongside the C-37A and the C-47P as the company's recognized studio condensers. A third-party mixer manual from the era, the Crown 7400 series documentation, lists the C-500 and C-47P together in its compatibility tables. That is a useful independent confirmation that the C-500 was a phantom-powered condenser rather than a tube or "T"-powered design. The same manual groups Sony's "C series (C37P, C38, etc.)" among microphones that are phantom-compatible and require power to operate. It also warns that the C-500 and C-47P are 48-volt microphones that will not function in a 24-volt system without external power. If you patch one into a modern preamp, it wants a proper 48 V phantom supply at full voltage.

The surviving record leaves out the usual basics. There is no published frequency response curve, no sensitivity figure, no self-noise number, no original retail price, and no confirmed production window. The advertising ran from at least September 1970 into August 1971. That brackets the microphone's active promotional life but says nothing definitive about when it was introduced or discontinued. Anyone chasing one will have to verify condition against the microphone itself, because the documentation is thin.