NVX True 900 watt RMS 5-Channel [JAD Series] Class D Car Full Range Amplifier [JAD900.5] IR Chip eliminates high-frequency interference delivering a crisp audio signal Class D circuitry makes the most out of the limited power of your cars electrical system Includes wired Remote Bass Knob to manage Bass Levels from inside the vehicle Variable Bass Boost (0 to +12 dB bass boost at 50 Hz) 3-way protection circuitry (thermal, overload, and speaker short protection)