THANK YOU for purchasing a B52 POWER AMPLIFIER. In order that we may better serve you ifyou require warranty service for your new amplifier, please retain your original purchase receiptand return the enclosed warranty registration page.PARTS LISTIncluded Hardware:• Owner's manual 1 piece• Mounting screw 4 pieces• 35A fuse 3 piecesFEATURES AND SPECIFICATIONSFeatures• The BMP-4004 use highly quality 1 Layer PCB.• Uniquely designed high efficient power transformer.• Rated 500 amp power supply switching FET.• 12dB stereo crossover filter.• High/low/full range select switch.• 50Hz+12dB bass boost control.• Use highly quality deluxe guage input RCA & deluxe guage power terminal connector.• Use class-A/B circuitry• Stable to 4 Ohm bridged mono. Protector: Output Short, over loads & over temperature.• Power & protect indicators.Specifications4 Ohm Bridge Max Power 2000W x 2 Input Sensitivity 200mV – 6V2 Ohm Max Power 1000W x 4 Input Impedance 20 kOhm4 Ohm RMS Power 500W x 4 Low Pass Frequency 32Hz - 320Hz2 Ohm RMS Power 750W x 4 High Pass Frequency 32Hz - 320HzS/N Ratio >95dB Bass Boost Level (50Hz) 0dB - +12dBTHD (@1Khz) <0.05% Fuse Rating 35A x 3Channel Separation (@1Khz) >50dB Dimensions (w x H x L) 9 1/2 X 2 2/7 X 18 8/9 InchFrequency Response 10Hz - 100KHz 241 X 58 X 480 mm3