Manual Apocalypse ATOM 1600 PRO Specifications Model ATOM 1600 PRO Class D Number of the channels 1 Frequency response 10 - 250 Hz 1 Ohm RMS Power (14.4 V) 1600 W 1 Ohm RMS Power (12 V) 1430 W 2 Ohm RMS Power (14.4 V) 1010 W 4 Ohm RMS Power (14.4 V) 550 W Minimum permissible load on the channel 1 Ohm Low pass filter 40 - 250 Hz Crossover 12 dB/Oct Subsonic filter 10 - 50 Hz Bass frequency adjustment  35 - 90 Hz Input terminal 4 Ga Output terminal 10 Ga Working voltage 9 - 16 V Signal-to-noise ratio ≥ 93 dB Size (WxLxH) 9 x 5.5 x 2.1 inch