Stewart Audio FLX-E-80-4-LZ Digital Matrix Processor

Compact Four-Channel DSP Amplifier for Low-Z Audio Systems
The Stewart Audio FLX-E-80-4-LZ is a four-channel amplifier designed to deliver efficient power and advanced DSP processing for 4Ω and 8Ω speaker loads. Each channel provides up to 80 watts at 4 ohms or 40 watts at 8 ohms, offering reliable performance in multi-zone environments such as classrooms, retail, hospitality, or boardrooms. With built-in signal processing, remote control capabilities, and Ethernet configuration, this 1/2 rack amplifier is built to handle the demands of modern installations without sacrificing space or functionality.

Built-In DSP for Complete Signal Control and Optimization
At the core of the FLX-E-80-4-LZ is a powerful digital signal processor that allows precise control over your audio routing and tuning. The DSP includes a full cross-point matrix mixer, parametric EQ, high- and low-pass filters, limiters, and pre-mix level adjustment. These tools give installers the flexibility to tailor the system to specific room acoustics, speaker types, and application requirements—all within the amplifier itself.

Ethernet Configuration and Real-Time Monitoring
With an integrated Ethernet port, the amplifier supports fast setup and ongoing management of system parameters. Whether managing one zone or configuring a network of amplifiers, installers can adjust settings remotely with ease. Ethernet control also enables real-time monitoring and reporting of performance, allowing efficient service and long-term reliability in larger-scale deployments.

Multiple Control Interfaces for Flexible System Integration
In addition to Ethernet, the FLX-E-80-4-LZ supports RS-232 and Remote Volume Control (RVC), enabling integration with third-party control systems or simple wall-mounted user interfaces. This allows end users or facility managers to adjust volume or recall presets without accessing the amplifier itself—ideal for schools, houses of worship, or meeting spaces with varied users.

Analog Input Versatility with Phantom Power Support
The unit features four analog inputs, configurable for mic or line level, with phantom power available on two channels. This flexibility allows for direct connection of microphones, media players, paging systems, or control processors. Whether the system uses analog sources exclusively or as part of a hybrid network, the FLX-E-80-4-LZ adapts without extra hardware.

Quiet Operation and Half-Rack Installation
Thanks to convection cooling, the FLX-E-80-4-LZ operates silently, making it suitable for quiet environments like conference rooms, libraries, or offices. Its 1/2 rack footprint allows it to be installed in AV furniture, under lecterns, or within ceiling spaces. The amplifier delivers powerful output and signal control from a space-efficient package, minimizing equipment clutter without sacrificing capability.