Stewart Audio CVA25-1 Mono Sub Compact Amplifier

Compact Mono Amplifier Built for Constant Voltage Systems
The Stewart Audio CVA25-1 is a mono constant voltage amplifier delivering 25 watts at either 70V or 100V, designed specifically for commercial and industrial sound systems. Housed in a 1/4 rack-width subcompact chassis, it brings full-range amplification to spaces where traditional amplifiers simply can’t fit. Whether it's concealed above ceilings, tucked into furniture, or installed behind digital signage, the CVA25-1 delivers consistent, high-quality sound without taking up unnecessary space.

Optimized for 70V and 100V Distributed Audio Installations
This amplifier is purpose-built for distributed audio systems that require constant voltage operation, such as paging systems, background music zones, and public address installations. Its support for both 70V and 100V line systems makes it adaptable to international and domestic audio infrastructure, while delivering clean, articulate power to multiple loudspeakers over long cable runs without signal loss.

Extremely Compact Design for Flexible Mounting Locations
At just a quarter rack in width, the CVA25-1 is designed to be installed where other amplifiers can’t go. It’s ideal for hidden installations in plenum spaces, lecterns, under counters, or inside wall enclosures. Its lightweight, convection-cooled build allows for quiet operation with no need for fans, making it suitable for environments that demand silent or discreet equipment.

Plenum Rated and Code Compliant for Ceiling Installation
The CVA25-1 meets UL 2043 plenum rating standards, making it safe for installation in air-handling spaces above suspended ceilings. This certification allows integrators to comply with building codes while keeping equipment out of sight. It's a smart choice for facilities where clean aesthetics and regulatory compliance are top priorities, such as hospitals, corporate offices, education buildings, and retail spaces.

Energy Saving with Signal Sense Power Technology
Equipped with Stewart Audio’s Signal Sense Power Technology, the amplifier automatically powers down when no signal is detected and wakes up instantly when audio returns. This reduces energy consumption and helps extend the life of the amplifier by reducing wear from constant operation. It also contributes to system efficiency and meets modern energy-saving standards expected in commercial AV.

Clean Power Output with Support for Emergency Muting
The CVA25-1 delivers full-range audio with low distortion, providing clarity and consistency across music, voice, or ambient system applications. It also includes music and fire alarm muting capability, allowing it to work in tandem with emergency systems by overriding audio when necessary. This feature is crucial in facilities where life safety systems must take priority during alerts or evacuations.