Audiobahn A4004J 400W 4-Channel Intake Series Car Amplifier 4-Channel Class AB Intake Series Car Amplifier RMS Power Rating: 4 ohms: 50 watts x 4 chan. 2 ohms: 100 watts x 4 chan. Bridged @ 4 Ohms: 200 watts x 2 chan. PWM MOSFET power supply Large display volt meter with blue illumination Bass Boost on/off switch