Power Helix D Four 4channel class AB Germany , barang berkualitas dan bergaransi resmi. Spec: RMS / max. power at 13.8 V - @ 4 Ohms 4 x 65 / 130 Watts - @ 2 Ohms 4 x 100 / 200 Watts - @ 1 Ohm - - bridged @ 4 Ohms 2 x 200 / 400 Watts Frequency response 10 - 20,000 Hz Bass boost 0 - 12 dB @ 55 Hz Highpass CH A amp; B: 50 - 250 Hz CH C amp; D: 10 - 250 Hz Lowpass CH C amp; D: 50 - 250 Hz Subsonic - Bandpass CH C amp; D: 10 - 250 Hz Phase - Signal-to-noise ratio 97 dB Input sensitivity 0.2 - 7.5 V Dimensions (H x W x D) 53 x 320 x 230 mm / 2.09 x 12.60 x 9.06