Check the listing for details. NVX VADM4 400W RMS V-Series Micro Full-Range Class D 4-Channel Amplifier. Condition: New. Listed at 179.99 USD. NVX VADM4 400W RMS V-Series Micro Full-Range Class D 4-Channel Amplifier Product Details: Marine Certified 4-Channel Class D Car Amplifier RMS Power Handling: 4 ohms: 75 watts x 4 chan. 2 ohms: 100 watts x 4 chan. Bridged, 4 ohms: 200 watts x 2 chan. Cutting-edge Micro Class D technology allows amplifiers to be extremely compact LED power (blue) and protect (red) indicators Conformal Coated Marine grade circuit board 2 or 4 channel operation Balanced Differential Inputs, to eliminate noise picked up by signal cables Speaker-level (high-level) inputs 3-way protection circuitry (thermal, overload, and speaker short protection) Input sensitivity: 0.2V-5V Selectable crossover modes: FULL / HPF / LPF Variable high-pass filter (40-500 Hz) Variable low-pass filter (40-500 Hz) Frequency Range: 20 - 20KHz Total Harmonic Distortion: