Stewart Audio FLX-E-80-4-CV 4-Channel DSP-Enabled Amplifier

Four-Channel DSP Amplifier for 70V/100V Commercial Audio Systems
The Stewart Audio FLX-E-80-4-CV is a compact four-channel amplifier delivering 80 watts per channel at 70V or 100V. Designed for distributed audio systems in commercial spaces, this amplifier combines flexible DSP processing, analog input routing, and remote control in a half-rack enclosure. It’s engineered for small to mid-sized zones that require efficient power delivery, audio optimization, and precise control—all in one reliable package.

Full DSP Control Built into Each Channel
At the core of the FLX-E-80-4-CV is a robust internal digital signal processor that enables precise routing and processing of audio signals. Each channel can be individually shaped with a full matrix mixer, EQ, high- and low-pass filters, limiters, and pre-mix level controls. These tools help installers fine-tune output for each speaker zone, compensating for differences in room acoustics or speaker models without requiring external gear.

Ethernet and Serial Control for Simplified Integration
Programming and real-time monitoring are handled through the amplifier’s Ethernet interface, allowing integrators to set up and manage installations efficiently. The amplifier also supports RS-232 and remote volume control (RVC), enabling direct interaction with third-party control systems and wall-mounted volume interfaces. Whether for centralized management or local zone adjustment, the control options provide maximum flexibility.

Multiple Analog Inputs for Source Versatility
The FLX-E-80-4-CV includes four analog inputs that are each configurable as mic or line level. Two of the inputs support phantom power, allowing integration with condenser microphones. This input flexibility allows connection to a variety of audio sources, such as paging systems, background music players, microphones, or matrix processors, making the amplifier highly adaptable across use cases.

Compact Format with Quiet Operation
Housed in a convection-cooled, 1/2 rack chassis, the FLX-E-80-4-CV operates silently and is ideal for environments that require discreet, quiet equipment—such as classrooms, conference rooms, hotels, and retail settings. Its space-saving design allows it to be mounted in cabinets, racks, or ceiling plenums, providing installation flexibility without compromising performance.

Optimized for Multi-Zone Background and Paging Systems
With four individually powered channels and full DSP routing capabilities, this amplifier is built for multi-zone applications where signal control and consistent audio coverage matter. Whether powering four ceiling speaker zones in a retail environment or distributing paging and music throughout a building, the FLX-E-80-4-CV delivers both power and precision in a compact, installer-friendly design.