SpecificationsModel AAB-300.4D AtomClass DNumber of the channels 4Frequency response 10-20000 Hz1 Ohm RMS Power (14.4 V) 321 W x 42 Ohm RMS Power (14.4 V) 204 W x 44 Ohm RMS Power (14.4 V) 120 W x 42 Ohm RMS Power (Bridge) 653 W x 24 Ohm RMS Power (Bridge) 426 W x 2Minimum permissible load on the channel 1 OhmMinimum permissible load in a bridge connection 2 OhmInput SPL 0.2 - 6 VLow pass filter 50-6000 HzHigh pass filter 15-6000 HzLPF and HPF simultaneous operation TrueCrossover 12 dB/OctBass frequency adjustment 45 HzInput terminal 4 GaOutput terminal 8 GaWorking voltage None VSize (W×L×H) 6.30 × 8.98 × 2.50 inchGross weight 5.29 lb (2.40 kg)