The 4-channel GM-6300F delivers up to 600-Watts (60 watts x 4 or 150 watts x 2 at 4 ohms; 75 watts x 4 at 2 ohms) to power your high-quality speakers. It also has built-in 4-channel crossovers. Speaker level inputs allow for easy connection to head unit. Not only will your music be louder, it'll also be cleaner, getting the most out of your speakers and your music. Constant road noise makes it hard for the music to be heard clearly. But with up to 600-Watts of max power, you get to hear every word and note. Load Impedance Capability - 2-8 Ohm Stereo, 4-8 Ohm (Bridged) Frequency Response - 10Hz - 50kHz Total Harmonic Distortion - 0.010% PWM Regulated MOSFET Power Supply Screw-Type - Speaker Terminals Balanced Isolator Input Circuit Input Level Control Hi-Volt (400mV - 6.5v) Built-in Crossover LPF/HPF (Front/Rear Independent) Crossover Frequency Range - 80Hz, -12dB/Oct. Dimensions - 11-13/16 x 2-3/8 x 13-1/8 (300 mm x 60 mm x 334 mm) Professional installation required