Biamp Desono CM20DTS 4.25-inch ceiling loudspeaker, white.

Biamp Desono™ CM20DTS 4.25" Ceiling Loudspeaker – Compact, Full-Range Audio for BGM & Paging

The Desono CM20DTS is a compact, high-performance 4.25-inch two-way ceiling loudspeaker designed to deliver crystal-clear audio for public address and background music applications. Featuring a coated paper cone woofer and a 1-inch tweeter, it offers high SPL with extremely low distortion, ensuring full-range clarity and exceptional speech intelligibility.

With a shallow 3.3-inch (84 mm) mounting depth, the CM20DTS is perfect for tight ceiling spaces. Its 5-position transformer (1.25W to 20W) and 16-ohm bypass support both 70V/100V constant-voltage and low-impedance systems, making it ideal for scalable distributed audio in commercial environments.

The speaker includes a paintable, thin-edge magnetic grille for a clean, professional appearance and toolless installation, while a front-mounted tap switch allows quick power adjustments without removing the speaker. Engineered for reliability, it includes overload protection for continuous operation in demanding environments.

Zoom Rooms Certified and ETL listed, the Desono CM20DTS is an excellent choice for offices, conference rooms, hallways, and any setting where space-saving, high-fidelity audio is required.

Applications

• Conference Rooms

• Hallways

• Training Rooms

• Multipurpose Rooms

• Lunch Rooms

• Manufacturing Areas

• Offices

• Waiting Rooms

Key Features

• Zoom Rooms Certified for seamless conferencing integration

• Compact design requires only 3.3-inch (84 mm) mounting depth

• 4.25" coated paper woofer and 1" tweeter for full-range, low-distortion sound

• High speech intelligibility and rich music reproduction

• 5-position transformer (1.25W–20W) with 16Ω low-impedance bypass

• Paintable, thin-edge magnetic grille for fast, clean installation

• Tuned bass reflex port for enhanced low-frequency response

• Front-mounted tap switch – no ceiling access required

• Overload protection for reliable 24/7 operation

• ETL listed to UL 1480A and UL 2043; CSA certified (C22.2#62368-1)

• 5-year manufacturer warranty

Biamp Desono CM20DTS Specifications