CRM 202S-RF

Boundary layer twin capsule having half cardioid polar pattern. CRM 202S-RF has a built in mechanism allowing the microphone to disappear after use simply by pressing the top downwards until it locks in place.
QUICK SPECS
Type
Condenser (back electret)
Polar Pattern
Half Cardioid Frequency Response 50 Hz - 18 KHz
Sensitivity
-37dB +/- 3dB at 1 KHz (0dB = 1 v/Pa)
Termination
Open ended for Audio RJ 45 via TS-C1 for switching

Engineered for Perfect Speech Capture

Boundary layer twin capsule having half cardioid polar pattern. CRM 202S-RF has a built in mechanism allowing the microphone to disappear after use simply by pressing the top downwards until it locks in place. A touch sensitive capacitive switch with RGB halo is incorporated into the top of the microphone allowing On/Off switching when used with a DSP or logic controlled box.

The microphone is constructed from high quality brass construction and is fitted with a phantom power adaptor accepting 9 to 48 volts DC. Impedance of 200 Ohms. The phantom power adaptor also includes filters which will eliminate all GSM frequencies from 800-1200 MHz.

Supplied with 2 x 2M (6.6ft) 2 core + screen cable with open ended termination. Frequency response 50 Hz – 18 KHz +/-3dB, sensitivity -37dB ± 3dB @ 1 KHz (0dB =1V/Pa), total harmonic distortion (THD) at an operating level of 125dB less than 1%. Microphone length below table: 112mm/4.4 ins Above table: 2mm (0.08ins) Body diameter: 56.5mm (2.2 ins).

Finish: Black Nextel® or Satin Nickel.

Dual element boundary layer microphone

with half cardioid polar pattern.

'RF Friendly' technology offering

immunity from GSM radio frequency

Technical Specifications

Length
Below table 112mm / 4.41 ins
Application
Designed for use in conference halls, schools, colleges, board rooms.
Type
Condenser (back electret)
Polar Pattern
Half Cardioid Frequency Response 50 Hz - 18 KHz
Sensitivity
-37dB +/- 3dB at 1 KHz (0dB = 1 v/Pa)
Impedance
200 Ohms
S/N Ratio
69dB (A) Maximum Sound Pressure Level 125dB 1% THD
Termination
Open ended for Audio RJ 45 via TS-C1 for switching
Finish
Black Nextel® or Satin Nickel
Dimensions
Microphone length below table: 112mm/4.4 ins, Above table when retracted: 2mm (0.08ins), when deployed: 15mm Body diameter: 56.5mm (2.2 ins).

Key Features

01

Dual element boundary layer microphone

02

with half cardioid polar pattern.

03

'RF Friendly' technology offering

04

immunity from GSM radio frequency

05

interference.

Downloads & Documentation

Product Data Sheet
PDF • 327.2 KB
Installation Guide
PDF • 340.8 KB
Installation Guide
PDF • 177.9 KB
Technical Note
PDF • 1.4 MB
Technical Note
PDF • 154.0 KB

Frequently asked questions

What industries does Clockaudio serve?
Clockaudio solutions are used across corporate offices, education, government, healthcare, broadcast, and commercial AV environments where reliable, high-quality audio is essential.

Yes — Clockaudio microphones and audio systems integrate seamlessly with major unified communications platforms including Microsoft Teams Rooms, Zoom Rooms, Cisco Webex, and Google Meet. Our boundary, gooseneck, and ceiling microphones deliver the clarity and reliability required for professional video conferencing installations worldwide.

Yes. Our engineering team provides system design consultations for integrators and end-users, helping specify the right combination of microphones, processors, and accessories for your space. Our technical support team is available throughout the installation and commissioning process.

Clockaudio has been designing and manufacturing professional audio products in the United Kingdom for over 40 years. Our UK facility handles R&D, precision assembly, and quality control — ensuring every product meets the standards expected by AV professionals worldwide.

The right microphone depends on your room size, acoustic environment, and application. Boundary microphones suit tabletop conferencing; goosenecks are ideal for fixed lectern or dais positions; ceiling-mounted mics offer clean aesthetics for modern meeting rooms. Contact our team or use our Search Facility to find a certified integrator near you for a tailored recommendation.

IDEAL FOR

Application Areas

Conference Rooms

Clear voice reproduction for video conferencing and unified communications.

Courtrooms & Legal

RF-immune design for reliable audio in sensitive legal proceedings.

Government & Municipal

Reliable audio systems for council chambers and government facilities.
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