LS800x4 $175 Stereo 4 Channel Class AB Amplifier 800 Watts Max power all channels driven 4 X 120 Watts Max @ 4 ohms 4 X 200 Watts Max @ 2 ohms 2 X 400 Watts Max @ 4 ohms mono Total Harmonic Distortion: .09% Frequency Response: 20Hz – 20Khz +- 3dB Signal to Noise Ratio: -95dB Stereo Separation: -60dB Damping Factor >200 MOSFET PWM Power Supply Variable input gain control Bass Boost @ 45Hz Switchable, Flat/+6dB/+12dB Power and Protection Indicators Onboard Fuse protection Selectable Crossover: HP/LP/ALL Crossovers: LPF 50Hz to 200Hz / HPF: 50Hz to 1.2Khz Designed and Engineered by MMATS Pro Audio. This line of amplifiers brings MMATS quality and performance to our friends on tight budgets. The perfect amplifier to improve any factory system. All 3 models are jam-packed with features making them extremely versatile to work with…. perfect for the do-it-yourselfer too! Buy with confidence, we got your back with a 1 year parts and labor warranty.