The Brandford 4 channel Amplifier has lot's of feature like High-efficiency MOSFET power supply, oversized capacitor tank, fully 2-ohm stable stereo operation, GOLD plated input and out connectors, bass/flat crossover switch, adjustable lowpass frequency crossover, switchable bass boost, simultaneous mono/stereo operation capability, bridgeable, 4-way protection circuitry, soft remote on/off circuitry, led indicator, line output. 1 Year Replacement or Repair Warranty.