Stewart Audio CVA50-1 Mono Sub Compact Amplifier

Mono 70V/100V Amplifier Built for Tight Spaces and Demanding Installs
The Stewart Audio CVA50-1 is a mono constant voltage amplifier delivering 50 watts of clean power at either 70V or 100V. Housed in an ultra-compact 1/4 rack-width form factor, this amplifier is designed for commercial and professional audio installations where space is limited and reliable sound distribution is critical. Whether you're powering distributed speakers in a retail store, school, office building, or house of worship, the CVA50-1 delivers consistent performance in a format that fits where standard amplifiers simply can't.

Built for Distributed Audio in 70V and 100V Systems
Supporting both 70V and 100V constant voltage outputs, the CVA50-1 is ideal for long cable runs and multiple speaker zones. It offers a reliable solution for background music, paging, and voice reinforcement systems. Its compatibility with both voltage standards makes it suitable for a wide range of regional and international system requirements, simplifying your design process across different building specs.

Compact Size Allows Installation in Unconventional Spaces
Measuring just a quarter rack in width, the CVA50-1 is designed to mount in locations where traditional amplifiers can’t—above ceilings, inside wall cavities, behind displays, or under counters. This flexibility is a game-changer for modern AV installations that prioritize concealed hardware and streamlined infrastructure without giving up amplifier performance.

Plenum Rated for Above-Ceiling Applications
The CVA50-1 meets UL 2043 plenum certification, allowing it to be safely installed in air-handling spaces above drop ceilings. This rating makes it compliant with building codes for commercial installations and enables discreet integration of audio systems in spaces like conference rooms, education facilities, healthcare environments, and public buildings where visibility and fire safety are both concerns.

Energy Efficient with Signal Sensing Technology
Equipped with Signal Sense Power Technology (SSPT), the CVA50-1 intelligently detects incoming audio signals and powers up or down accordingly. When no signal is present, the amplifier enters a low-power sleep mode, saving energy and reducing operational wear. This feature supports Energy Star compliance and helps extend the amplifier’s operational life over long-duty cycles.

Quiet, Fanless Operation with Emergency Audio Support
Designed with convection cooling, the CVA50-1 operates silently, making it a great fit for quiet environments. It also includes music and fire alarm muting functionality, allowing the system to interface with emergency paging or alarm systems. This ensures that alert tones take precedence over background audio when needed, helping meet building safety and communication standards.