Optimal Audio 4 x 125W amplifier with integral DSP

The Optimal Audio SmartAmp 20 is a versatile 4-channel amplifier delivering 4 x 125W of reliable, high-fidelity power in a compact half-rack width, 1U chassis. Engineered for commercial installations, it combines efficient Class-D amplification with comprehensive onboard DSP, eliminating the need for external processing and simplifying system architecture.

Each channel features flexible output configuration supporting both low-impedance and 70V/100V constant voltage operation, making it ideal for distributed audio systems in retail, hospitality, corporate, and entertainment venues. Bridged mode operation delivers 2 x 250W for applications requiring greater headroom.

- 4 x 125W Class-D amplification (2 x 250W bridged)
- Integral DSP with EQ, delay, crossover, and limiting per channel
- Low-impedance and 70V/100V line output capability
- Browser-based control via the Optimal Audio WebApp
- Pre-loaded speaker presets for seamless loudspeaker pairing
- Compact half-rack, 1U form factor
- Energy-efficient design with convection cooling for silent operation
- Balanced analog inputs with GPIO for preset recall

Controllable over a standard network through the intuitive Optimal Audio WebApp, the SmartAmp 20 enables integrators and installers to configure, monitor, and manage systems remotely with ease. Purpose-built speaker presets ensure optimised performance with Optimal Audio loudspeakers, reducing commissioning time and delivering consistent, professional results across every zone.