DS18 SLC1100.4 Select 1100 Watts Four Channel Amplifier This High Power Amplifier Comes in a Black and Glossy Extruded Aluminum Chassis with Polished Heat Sink, MOSFET PSU Transistors and Fully Regulated PMW Power Supply, Hi/Low/Pass Crossovers and Pre-Amp Outputs This Amplifier Also Has 200mV-5V Low Level Inputs, Direct 4 GA. Power Terminals, 8GA. Speaker Terminals, 2-OHM Stable in Stereo Mode, 4-OHM Bridged Stable Class A/B, Unbalance Inputs (RCAs), Full-Range Line Outputs (RCAs) and Tri-Mode Capability With Power and Diagnostics LEDs, Unbalanced Inputs (RCAs) and Full-Range Line Outputs (RCAs) this Amplifier can bring you the best power with RMS POWER @ 4-OHMS: 4 X 50W, RMS POWER @ 2-OHMS: 4 X 100W, RMS POWER @ 1-OHM: N/A, RMS POWER @ 4-OHMS BRIDGED 2 X 150W Featuring Crossover and Switching capabilities: Variable Hi/Low Pass: 50 Hz - 400 Hz, Bass Boost: 0-6-12dB at 45 Hz, a Signal to Noise Ratio of 104dB and a Frequency Response of 10 Hz - 60 KHz Lastly, this Amplifier Includes Variable Input Level Controls and a Four Way Protection Circuit: Thermal Protection, Over-Load Current Protection, Output Direct Current Protection and Speaker Short Circuit Protection