Biamp Desono EX-S8-CM 8-Inch Surface Mount Loudspeaker

The Biamp Desono EX-S8-CM is an 8-inch two-way coaxial surface-mount loudspeaker designed for professional distributed audio systems in indoor and outdoor environments. Its combination of an 8-inch low-frequency driver and coaxially mounted compression driver provides consistent 105° x 105° coverage, making it well suited for applications that require clear speech reproduction, music playback, and broad, even sound coverage.

The EX-S8-CM supports both 70V/100V constant-voltage systems and 8-ohm low-impedance operation, allowing it to integrate into a wide range of commercial audio installations. With a frequency response of 55 Hz to 20 kHz, 90 dB sensitivity, and up to 250W continuous power handling, the EX-S8-CM provides the output and bandwidth needed for larger distributed sound applications.

Designed for Indoor and Outdoor Distributed Audio

The EX-S8-CM is designed for applications where a surface-mounted speaker needs to provide both wide coverage and strong low-frequency performance. The 8-inch treated-paper LF driver and 1.4-inch voice-coil compression driver are mounted coaxially to maintain consistent coverage across the listening area.

The 105° x 105° conical coverage pattern makes the EX-S8-CM useful for filling larger spaces while minimizing uneven coverage between listeners.

Typical applications include:

• Hospitality venues
• Restaurants and entertainment spaces
• Corporate facilities
• Retail environments
• Educational facilities
• Distributed background music systems
• Speech reinforcement
• Indoor and outdoor commercial sound systems
• Fill applications requiring additional output and bass

Flexible 70V, 100V and 8-Ohm Operation

One of the biggest advantages of the Desono EX-S8-CM is its flexible power configuration. The integrated transformer provides selectable 70V and 100V transformer taps, while an 8-ohm bypass allows the speaker to be used in conventional low-impedance systems.

Transformer Tap Settings

70V: 80W, 40W, 20W, 10W
100V: 80W, 40W, 20W

For low-impedance installations, the EX-S8-CM operates at 8 ohms. This makes the speaker suitable for both distributed commercial audio systems and conventional amplifier/speaker configurations. 

8-Inch Coaxial Design for Speech and Music

The EX-S8-CM combines:

• 8-inch treated-paper LF driver
• 1.4-inch voice-coil compression driver
• 1.55 kHz crossover
• 90 dB sensitivity
• 55 Hz–20 kHz frequency response
• 250W continuous power handling
• 115 dB continuous / 121 dB peak maximum SPL when processed

The coaxial driver arrangement helps maintain consistent sound distribution from a single enclosure, making the EX-S8-CM practical for distributed systems where consistent coverage is important.

Flexible Click Mount Installation

The EX-S8-CM supports Biamp's Click Mount installation system, providing multiple mounting options for different installation requirements.

The available mounting configurations include:

• Pan-Tilt Bracket – provides indexed vertical or horizontal aiming.
• U-Bracket – suited to low-profile and outdoor installations.
• Click Plug – provides a weather-resistant connection point with an integrated gland nut.

The mounting system is designed to simplify installation while providing tamper- and theft-resistant features.

Suitable for Commercial and Life-Safety Applications

The EX-S8-CM is certified to a range of commercial and life-safety standards, including:

• UL 1480A
• CSA 62368-1
• CE
• RoHS
• EN54-24
• ISO 7240-24

These certifications make the EX-S8-CM suitable for installations where documented compliance is an important part of the speaker selection process.

Biamp Desono EX-S8-CM Specifications

The technical specifications above are based on the information in the current Audio Supply page.

Why Choose the Biamp Desono EX-S8-CM?

The EX-S8-CM is a good fit when a project requires more output and low-frequency capability than a smaller surface-mount loudspeaker can provide. Its 8-inch coaxial design, 105° coverage, 70V/100V transformer taps, and 8-ohm bypass give system designers flexibility when working with different amplifier and distributed-audio configurations.

The Click Mount system also makes it easier to adapt the installation to the physical requirements of the space.

Why Buy from Audio Supply?

Audio Supply can help you select the right Biamp Desono loudspeakers, amplifiers, mounting accessories, and related commercial audio equipment for your installation. If you're building a distributed 70V/100V system or need help determining amplifier and speaker compatibility, our team can help you identify the appropriate components.