The S4.600.4S is Lightning Audio's most versatile amp. It utilizes two separate power supplies with two separate output sections for front and rear channels. More power is created on rear channels to deliver higher performance where it is needed most. Description Value CEA-2006 Compliant Yes Number of Channels 4 Rated Power Front 60 Watts x 2 @ 4-Ohms / Rear 125 Watts x 2 @ 4-Ohms Front 100 Watts x 2 @ 2-Ohms / Rear 200 Watts x 2 @ 2-Ohms Front 200 Watts x 1 @ 4-Ohms (bridged) / Rear 400 Watts x 1 @ 4-Ohms (bridged) Total Power 600 Watts Max Power Bridgeable Yes Crossover Controls Front & Rear: High/Flat/Low 12dB/octave x-over variable from 50Hz - 250Hz Tone Controls N/A Tone Controls Signal Input Front/Rear Low Level (RCA): 100mV - 5V Signal Output Pass-Thru RCA Power Input Connector Block Terminal Power Wire Gauge 4 AWG Speaker Output Connector Block Terminal Speaker Wire Gauge 12 AWG Heat Sink Type Extruded Aluminum Cooling Convection Remote Control N/A Remote Control Visual Indicators Combination Power / Protect Circuit Topology Class Class A/B Frequency Response 10Hz - 30kHz Signal-to-Noise Ratio >70dB A-weighted Channel Separation 50dB Fuse Value (2) 40 Amp Dimensions 2.0" H x 10.5" W x 15.75" L (5.08cm x 26.67cm x 40.00cm) Shipping Weight Kit Includes Allen Wrenches Mounting Screws Replacement Fuses Specifications subject to change without notice