WAudio SUA-350 350W Subwoofer Plate Amp

Updated August 21, 2026

Brand: WAudio Condition: NEW- Damaged?: No Missing Parts?: No Model: SUA-350 Title: WAudio SUA-350 350W Subwoofer Plate Amp 350W RMS FOR 4-OHM SUBWOOFERS: Built for DIY powered-subwoofer projects and replacement plate-amp upgrades; the SUA-350 is rated at 350W RMS with a 4-ohm load. BASS CONTROLS FOR ROOM MATCHING: Adjust crossover from 50 to 180 Hz, phase from 0 to 180 degrees, and EQ/gain modes to blend low-frequency output with your main speakers. RCA AND BALANCED CONNECTIONS: Connect line-level sources through Right/Left-Mono RCA inputs, with balanced input/output support for compatible audio systems and longer signal runs. AUTO, ON AND OFF POWER MODES: Rear 3-way power switch lets you choose always-on, auto signal-sensing, or off operation; front LED indicates operation or standby. CHECK VOLTAGE BEFORE INSTALLATION: Rear voltage selector supports 110V/230V operation; set the correct voltage before powering the amp and install with proper ventilation and grounding. ROBUST PROTECTION CIRCUITY: Built-in protection against short circuits, over-temperature, and overload ensures long-term reliability and safety for your amplifier and connected subwoofer. BASS BOOST FEATURE: For extra punch, the amp includes a built-in bass boost at 45Hz (+6dB), giving you more depth in your low-end frequencies, perfect for cinema-quality sound or intense music playback. STANDYBY MODE: Energy-efficient standby mode consumes less than 0.5W of power, making it environmentally friendly without sacrificing convenience.

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