AKG D-330BT (c. 1979–1980)
The AKG D-330BT was a vocal microphone from AKG's D 300 series. The series was a three-mic line aimed at stage use, and it also included the D 310. It showed up in trade advertising in late 1979, pitched as studio quality for live work. The D-330BT used a uni-directional polar pattern meant to minimize acoustic feedback and picked-up ambience. AKG's advertising claimed the integral windscreen eliminated pop and breath sounds entirely. The stainless steel grille was touted as resisting impact damage and deformation. Audio (October 1980, p.105) listed the D-330BT in a product directory alongside the Shure SM81, so it was still in distribution roughly a year after launch.
The period record gives only a few concrete specifications. Nominal impedance is 200 ohms, rated sensitivity is -60 dBm, and weight is 12 ounces without the cable. The capsule was precision-aligned in a mold during manufacture. Beyond that, almost nothing is documented - no measured frequency response, no list price figure, and no detailed review appears to survive.
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