This 4-channel Class A/B amplifier is tuned for listeners who want warm, accurate sound rather than just raw output. It's rated at 4 x 250W into 4 ohms and up to 4 x 500W when bridged into a 2-ohm load, enough to run a full speaker set or add a subwoofer to round out the low end. Distortion stays under 0.01% THD with a signal-to-noise ratio of 100 dB, so instruments and vocals come through clean and detailed even at higher volumes. The brushed black aluminum alloy housing dissipates heat during long playback sessions to keep performance steady, and a built-in fuse protects your car's electrical system from current spikes. At 13.7 x 8.5 x 1.8 inches and 5.07 pounds, it mounts in a trunk or under a seat in sedans, SUVs, pickup trucks, off-road vehicles, and sports cars running a 12V electrical system.