AKG PZM11 - Security Microphone

AKG PZM11 - Security microphone (hemispherical boundary, microphone-level output, 12–48 V phantom power)

The AKG PZM11 is a Pressure Zone Microphone (BPM) designed for indoor security, surveillance, and intercom applications . It mounts flush to a wall or ceiling using a standard electrical box , and its discreet, switch-like faceplate provides a concealed installation. The PZM principle places the condenser capsule very close to the surface, achieving hemispherical pickup pattern with high intelligibility , smooth response, and consistency around the microphone. It delivers a balanced, low-impedance microphone-level output via screw terminals suitable for long runs to a preamp/mixer and is phantom powered at 12–48 V DC . The response is optimized for vocals: a low-frequency roll-off below the vocal range minimizes HVAC noise, and a slight treble boost improves articulation.

Main features

• Recessed and discreet design: Mounts in standard electrical box ; plate/switch appearance for security installations.
• Hemispherical pattern (PZM): Uniform coverage when mounted on a wall or ceiling; great clarity and “reach.”
• Optimized for voice: 80 Hz–20 kHz response with bass roll-off and slight treble boost for intelligibility.
• Simple and professional connection: balanced microphone-level output via terminals 1 (ground), 2 (signal +), 3 (signal −); impedance 225 Ω ; minimum recommended load ≥ 1 kΩ .
• Phantom power: 12–48 V DC applied at 2/3 of 1; very low consumption (~ 0.4 mA ).
• Acoustic performance: sensitivity 5 mV/Pa (−46 dBV/Pa) , self-noise 26 dB-A , SNR 68 dB(A) at 94 dB SPL, max. SPL 120 dB (3 % THD).
• Paintable finish: off- white , can be painted to blend into the decor.
• Compact and lightweight format: plate approx. 115 × 70.6 × 43.7 mm ; 0.071 kg .

Product benefits

• Discreet and clean installation: flush-mounted in a standard box, with screw terminals that eliminate the need for additional connectors.
• Clear voice in real-world environments: less HVAC noise and better consonant articulation for monitoring and recording .
• Professional integration: balanced, low-impedance output for long, lossless runs to matrix, recorders, or mixers.
• Low operating cost: very low power consumption from the phantom power available on most equipment.

Use cases

• Surveillance and security at entrances, ticket offices, windows, and control rooms.
• Intercom and customer service at counters, banks, parking lots, and ticket offices.
• Meeting rooms and spaces where discreet flush-mount microphones are required.

Frequently Asked Questions

• Is it suitable for outdoor use? The PZM11 is for indoor use . For outdoor use, there is the PZM11 LL WR (rain-resistant) variant.
• Does it require special power? Yes, it requires 12–48 V DC phantom power from the mixer or an external phantom power supply.
• What electrical box do I need? A standard flush-mount box; the plate is screwed in like a conventional switch.
• Can I paint it? Yes. The off-white finish is paintable. Avoid obstructing the acoustic grille/shroud.

Description for projects

AKG PZM11 recessed boundary microphone; hemispherical pattern; electret condenser transducer; balanced microphone-level output via terminals (1 GND, 2 hot, 3 cold); impedance 225 Ω ; minimum recommended load ≥ 1 kΩ ; sensitivity 5 mV/Pa (−46 dBV/Pa) ; noise 26 dB-A ; SNR 68 dB(A) (94 dB SPL); response 80 Hz–20 kHz ; max. SPL 120 dB (3 % THD); phantom power 12–48 V DC (~0.4 mA); dimensions approx. 115 × 70.6 × 43.7 mm ; weight 0.071 kg ; paintable off-white finish.