CRM 203S-RF

each side and at the end of the table. The Microphone is a low profile triple element boundary layer through table design with 3 Cardioid polar pattern.
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

each side and at the end of the table. The Microphone is a low profile triple element boundary layer through table design with 3 Cardioid polar pattern. The Microphone has the ability to retract leaving only 2mm (0.078″) protruding above the surface.

The microphone is engineered in high quality brass for long life and smooth running. The Microphone has 3 integral electronic modules which requires a 9 – 48 volt Phantom Power supply. The module is fitted with filters which will eliminate all GSM frequencies from 800 – 1200MHz, Impedance 200 Ohms, Frequency Response 50Hz – 18KHz, Sensitivity -37 ± 3dB @ 1Kz (0dB = 1V/Pa), MSP 120dB THD is no greater than 1%.

The Microphone connections: Audio is a 2 metre (6.6ft) open ended 2 core and screen cable (2 Black, 1 X White). (A touch sensitive switch with RGB halo is incorporated into the top of the microphone allowing On/Off switching when used with a DSP or logic box). Finish: Black Nextel® or Satin Nickel.

Triple element boundary layer microphone

with half cardioid polar pattern.

Cardioid Polar Pattern.

Patent pending No. 1109720.1

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

Triple element boundary layer microphone

02

with half cardioid polar pattern.

03

Cardioid Polar Pattern.

04

Patent pending No. 1109720.1

05

Easy to install

Downloads & Documentation

Product Data Sheet
PDF • 327.6 KB
Installation Guide
PDF • 294.4 KB
Technical Note
PDF • 1.4 MB
Technical Note
PDF • 154.0 KB
Technical Note
PDF • 979.5 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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