AKG PZM30D - Installation microphone

AKG PZM30D - PZM boundary microphone for installation (hemispherical, switchable response 20 Hz–20 kHz)

The AKG PZM30D is a high-performance boundary microphone based on PZM (Pressure Zone Microphone) technology, optimized for fixed installations and professional sound reinforcement. When placed on a rigid surface (table, wall, stage, or piano lid), the capsule picks up in the “pressure zone” where the direct and reflected waves are in phase, achieving a uniform hemispherical response , high sensitivity, and natural off-axis sound. It features flat (F) or rising (R) response switching to tailor presence and brightness to the application: speech and conferencing with extra intelligibility, or music and instruments with flat response.

With a 20 Hz to 20 kHz range , 7 mV/Pa sensitivity , and 74 dB(A) signal-to-noise ratio , the PZM30D delivers clear pickup with 20 dB-A self-noise and handles up to 150 dB SPL . It operates on 12–48 V phantom power and delivers a balanced XLR signal at low impedance ( 240 Ω ) for long cable runs. Its low-profile metal chassis is unobtrusive on a tabletop or stage, and the detachable cable makes installation and maintenance easy.

Main features

• PZM Technology : Higher effective sensitivity and coherent pickup on rigid surfaces.
• Hemispherical pattern on table, wall or floor, with off-axis response without marked colorations.
• Switchable dual curve : Flat (F) for neutral response or Rising (R) to add presence/brightness to vocals, percussion, piano, etc.
• Professional performance : 20 Hz–20 kHz, 7 mV/Pa, S/N 74 dB(A), self-noise 20 dB-A, max. 150 dB SPL.
• Easy installation : 12–48 V phantom power, balanced XLR output, detachable cable and low-profile body.
• Rugged construction for continuous use in corporate AV, broadcast and theater.

Product benefits

• Improved intelligibility in meeting and conference rooms thanks to the proximity to the surface and the option of upward response.
• Discreet appearance on tables and stages, ideal for camera and live events.
• Versatility of use for vocals, ambient sounds, instruments, and as a floor mic in theater.
• Professional integration with any sound system via balanced XLR and standard phantom power.

Use cases

• Meeting tables, teleconferences and classrooms.
• Theater : floor mic for dialogue and stage effects.
• Broadcast and stream from lecterns/tables without obstructing the image.
• Musical recording : on the piano top, percussion or as an ambient pair on surfaces.

Frequently Asked Questions

• Does it require special power? No, it runs on standard 12–48 V phantom power .
• How do I choose the “Flat” or “Rising” curve? Use the microphone's response switch . “Rising” provides presence; “Flat” maintains maximum neutrality.
• Can it be placed on a wall or ceiling? Yes. On any large, rigid surface, the pattern is hemispherical ; choose the location based on the desired coverage.

Description for projects

AKG PZM30D boundary microphone (electret condenser) with hemispherical pattern on a hard surface. Response : 20 Hz–20 kHz; sensitivity : 7 mV/Pa (−43 dBV/Pa); self-noise : 20 dB-A; S/N : 74 dB(A) at 94 dB SPL; max. SPL : 150 dB (3 % THD); impedance : 240 Ω balanced; power : 12–48 V phantom power; output : balanced XLR (3-pin); switchable flat/rising response ; dimensions : approx. 152 × 127 × 19 mm; weight : approx. 184 g; finish : black; detachable cable .