New Car HiFi Amplifiers of High Quality With a particularly attractive price-performance ratio, equipped with integrated crossover networks for high requirements and with 2Ω stability.Car HiFi amplifier, 700W 4-channel power amplifier with adjustable high-pass filter and low-pass filter for each channel pair, switchable 2-channel, 3-channel or 4-channel operation. Due to the extensive equipment, ideally suited for the combination of a stereo mid-high range system with any subwoofer or also for driving speakers in the front or rear, var. bass boost for each channel pair, additional mono line out (2x), high power input possible with FGA-22 or FGA-22HQ.autohifi 5/2006 Price/performance: **** "Considering the very attractive price, the HPB-604 provided a perfect performance. The amplifier is equipped with extensive features and its full sound was very much liked."