Finding an amplifier that delivers raging power and remains cool under pressure is almost impossible...until now. The PowerHouse line of A/B amplifiers have oversized fully regulated Mosfet Power Supplies; these transistors have high switching speed and generate no heat. Combined with Pulse Width Modulation, they stabilize the amplifier output under varying battery conditions. The PowerHouse A/B Class amplifiers are second to none. - Built-in variable crossover-VARIXR - Low pass, full range, or high pass operationsIndependent - Low level RCA inputs Independent high level inputs - Crossed audio signal RCA outputs