Features: - Class “AB” High-Current Dual Discrete Drive Stages - Mosfet PWM Power Supply - Electronic Crossover Network - Low Pass Filter Controls - High Pass Filter Controls - Bass Boost Circuitry - 4 Channel Bridgeable MOSFET Amplifier - 2 Ohm Stable - PWM (Pulse-Width-Modulation) System - Custom Terminal Block for Speaker Connection - Thermal / Overload / Short Circuit Protection - Soft Turn On/ Off - Advanced Protection Circuitry - Chrome RCA Inputs, Power Speaker Terminals - Line Output (L/R) Channels - 5 Way Protections - Power + Protection LED Indicators What's in the Box: - Invincible Series Amplifier - High to Low Converter - (4) Tapping Screw 0.16 x 0.63’’ -inches - (4) Spacer F4.0 - (2) Fuse-25A Technical Specs: - 4 x 250 Watt RMS @ 4 Ohm - 4 x 350 Watt Peak @ 4 Ohm - 4 x 350 Watt RMS @ 2 Ohm - 4 x 500 Watt Max @ 2 Ohm - Bridgeable Power @ 4 Ohms: 2 x 1000W - Frequency Response 20 Hz-50kHz (±3dB) - Output Power @ 14.4v DC, 50Hz - Input Impedance: 20K Ohms - S/N Ratio: >90dB - T.H.D.: <0.01% - LPF Freq. Resp.: 50Hz - 250Hz - HPF Freq. Resp.: 80Hz - Bass Boost(50Hz): 0,6,12dB - Input Sensitivity:0.2V~6V - Fuse: 25A x 2 - Product Dimensions (L x W x H): 14.33'' x 8.13'' x 2.28'' -inches