Biamp 920-01543-20000 CM20T
Product Overview
The Biamp CM20T is a 6.5-inch two-way in-ceiling loudspeaker for speech and background music in commercial spaces. This white model suits retail, hospitality, and corporate installations that need clear paging and music from a compact ceiling speaker. The CM20T works as a 16-ohm loudspeaker or on a 70V/100V distributed line, so it fits a wide range of system designs. Its IP54-rated build and aluminum grille make it suitable for humid environments.
Product Description
The Biamp CM20T ceiling loudspeaker pairs a 6.5-inch reinforced polypropylene woofer with a 1-inch tweeter for low-distortion reproduction of microphone paging and background music. In 16-ohm use, up to four loudspeakers connect in parallel on each channel of a standard 4-ohm amplifier. For 70V/100V distributed audio, the CM20T includes a 20-watt transformer with multiple power taps, useful in high-ceiling rooms or spaces with background noise where extra output is needed. The ABS housing, moisture-proof woofer, and aluminum grille make the CM20T suitable for high-humidity environments and applications where steel grilles would corrode. A three-screw mounting system with a Quick Fix connector and tapping decal speeds installation, and the hidden screws give a clean ceiling appearance. This white unit (RAL9010) is the color sibling of the CM20T-BL (black); for a larger 8-inch model, see the CMX20T. Browse the Biamp collection for amplifiers and companion ceiling speakers.
Key Features
- 6.5-inch two-way driver — The reinforced polypropylene woofer and 1-inch tweeter deliver low-distortion background music and clear paging.
- 70V/100V transformer with taps — A 20-watt transformer with 20/10/5/2.5 W taps lets integrators set output for high-ceiling or noisy spaces.
- 16-ohm parallel operation — Up to four CM20T units run in parallel per channel of a standard 4-ohm amplifier for low-impedance zones.
- IP54 moisture resistance — The ABS housing and aluminum grille suit humid spaces where steel grilles would corrode.
- Three-screw quick mounting — Hidden screws and a Quick Fix connector speed installation and keep the ceiling appearance clean.
- White paintable finish — The white grille (RAL9010) can be painted to match the ceiling for a discreet installation.
Technical Specifications
| Model / SKU | Biamp CM20T (White) / 920-01543-20000 |
| Type | 6.5-inch two-way in-ceiling loudspeaker |
| Woofer / tweeter | 6.5 in woofer / 1 in tweeter |
| Frequency response | 60 Hz – 20 kHz |
| Sensitivity (1 W @ 1 m) | 86 dB |
| Max SPL @ 1 m | 104 dB |
| Impedance | 16 Ω (low-Z continuous power 30 W) |
| 70 V taps | 20 / 10 / 5 / 2.5 W |
| 100 V taps | 20 / 10 / 5 W |
| Outside diameter | 205 mm |
| Cutout diameter | 186 mm |
| Depth | 80 mm |
| Grille material | Aluminium |
| IP rating | IP54 |
| Weight | 1.40 kg |
| Colour | White (RAL9010) |
Specifications sourced from Biamp product documentation (biamp.com / downloads.biamp.com). Confirm detailed specifications against current Biamp documentation.
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