AKG PZM10 Boundary Layer Microphone

The PZM10 is a pressure zone microphone built for security, surveillance, and conference-table use where a visible microphone is unwelcome. Its tubular housing mounts flush into a 25/32-inch hole in a ceiling panel, wall, or table, so it reads as hardware rather than a mic.

Like other pressure zone designs, the capsule sits in the boundary layer just above a reflecting plate, combining direct and reflected sound in phase for extra sensitivity, lower noise, and a smooth response free of comb-filtering. Low frequencies below the voice range are rolled off to reduce HVAC rumble, and a steel case with a humbucking transformer keeps it quiet near fluorescent lighting. The standard PZM10 outputs mic level on a 3-pin XLR; the PZM10 LL outputs line level on unterminated cable.