Class A/B Analog 4-Channel Amplifier The CRUNCH GPX amplifiers offer an almost unbeatable price-performance ratio. They impress with solid quality, well thought-out design and stand for lasting sound fun in the car. With price-optimized performance and easy-to-use features, the amplifiers are the perfect start for car audio fans. 2 x Highpass Filter 50~250 Hz 1 x Lowpass Filter 50~250 Hz Bass Boost 0/6/12 dB RCA Inputs Bass Level Remote Controller 4 x 110/200 Watts RMS @ 4/2 Ω 4 x 220/375 Watts MAX @ 4/2 Ω 2 x 400 Watts RMS bridged @ 4 Ω 2 x 750 Watts MAX bridged @ 4 Ω 254 x 46 x 392 mm