POWER SUPPLY MAX OUTPUT VOLTAGE PRE GRAPHIC FREQUENCY EQUALIZATION RANGE SUBWOOFER FREQUENCY INPUT IMPEDANCE S/N RATIO T.H.D CHANNEL SEPARATION FREQUNCY RESPONSE 11~15V DC NEG. GROUND 11V RMS 63Hz,125Hz,315Hz,750Hz,2.2KHz,6KHz,12KHz, +/-18DB 33~250Hz...