Stewart Audio FLX-E-320-1-CV – Mono DSP-Enabled Amplifier
The Stewart Audio FLX-E-320-1-CV is a professional 320W mono Class D DSP-enabled amplifier designed for commercial audio, installed sound, and 70.7V/100V distributed speaker systems. It combines high-efficiency amplification with an integrated DSP platform for signal routing, EQ, filtering, limiting, mixing, and system control, eliminating the need for separate processing equipment.
Key Features
- 320W RMS mono output
- Supports 70.7V / 100V constant-voltage speaker systems
- Integrated full-function DSP
- Cross-point mixer for flexible signal routing
- Pre-mix level control
- Built-in EQ, filters, limiters, and signal processing
- 4 analog line/mic inputs
- 24V phantom power on 2 inputs
- Ethernet configuration, control, and reporting
- RS-232 and 0–10V remote volume control
- Optional Dante™ / AES67 network audio
- Fanless convection cooling
- Universal 100–240VAC power input with PFC
- Compact aluminum chassis
- Optional single or dual rack mounting
- Not Dante-networked in the standard FLX-E-320-1-CV version
Technical Specifications
| Specification | Details |
|---|---|
| Model | FLX-E-320-1-CV |
| Product Type | Mono DSP-Enabled Amplifier |
| Amplifier Class | Class D |
| Output Power | 320W RMS × 1 |
| Constant Voltage Output | 70.7V / 100V Selectable |
| Frequency Response – 4/8Ω | 20Hz–20kHz (+0/-3dB) |
| Frequency Response – 70.7V/100V | 100Hz–20kHz (+0/-3dB) |
| THD+N | <0.05% @ 6dB Below Clipping |
| Signal-to-Noise Ratio | >95dB |
| Local Input Sensitivity | 1V (0dBV) |
| Input Impedance | 7.2kΩ Balanced / 3.6kΩ Single-ended / 2.4kΩ Phantom |
| Analog Inputs | 4 × Line/Mic |
| Phantom Power | 24V on 2 Channels |
| DSP | Cross-point Mixer, EQ, Filters, Limiters, Pre-mix Level Control |
| Network Port | RJ-45 |
| Network Audio | Optional Dante™ / AES67 |
| Remote Volume Control | 0–10VDC |
| Control Interfaces | Ethernet, RVC, RS-232 |
| Input Connectors | 3.5mm Euroblock |
| Output Connectors | 5mm Euroblock |
| Power Supply | 100–240VAC, 50/60Hz |
| Cooling | Convection, Fanless |
| Idle Power Draw | 12W |
| 1/8 Rated Audio Power | 60W |
| Chassis | Aluminum |
| Mounting | Optional Single/Dual Rack Mount |
| Dimensions | 1.7 × 8.3 × 10.7 in (44 × 213 × 272 mm) |
| Weight | 4.9 lbs (2.2 kg) |
Built-In DSP
The integrated DSP is one of the major advantages of the FLX-E-320-1-CV. It provides audio processing and routing directly within the amplifier, including:
- Cross-point mixing
- Pre-mix level control
- EQ
- Audio filters
- Limiters
- Signal routing
- System-level configuration and control
This allows installers to configure an audio system without requiring separate external DSP hardware for many applications.
Network & Control
The amplifier provides Ethernet-based configuration, control, and reporting, making it particularly useful for larger installations where multiple amplifiers need to be configured or monitored.
Additional control options include:
- Ethernet
- RS-232
- Remote Volume Control (0–10VDC)
- Optional Dante™ / AES67 network audio
The standard FLX-E-320-1-CV is not Dante-networked. For integrated Dante networking, the Dante-enabled variant is the FLX-E-320-1-CV-D.
Key Benefits
High-Power Distributed Audio: With 320W RMS at 70.7V/100V, the amplifier is well suited for commercial distributed speaker systems.
Integrated DSP: Built-in processing reduces the requirement for additional external DSP equipment and simplifies system architecture.
Flexible Input Configuration: Four line/microphone inputs allow multiple audio sources to be connected, while two inputs provide 24V phantom power for compatible microphones.
Remote System Control: Ethernet, RS-232, and 0–10V remote volume control provide multiple options for integration into professional AV control systems.
Silent Operation: Fanless convection cooling makes the amplifier suitable for environments where acoustic noise is a concern.
Efficient Installation: Its compact 1.7-inch-high chassis provides a high power-to-size ratio and supports optional rack mounting.
Ideal Applications
- Commercial PA systems
- 70V/100V distributed audio
- Corporate offices
- Conference rooms
- Schools and universities
- Retail stores
- Hotels and hospitality
- Houses of worship
- Public spaces
- Background music systems
- Paging systems
- Large-scale AV installations
- Multi-zone commercial audio systems
