GAS PRO POWER 80.4 is a 4-channel amplifier that delivers 4x80W RMS in 4 Ohms, enough power to drive most front and rear systems with ample margin. The amplifier is powered by the tried and true, musical class AB technology. With the PRO POWER 80.4, GAS has made some interesting advancements! The first thing you’ll notice is the new design that looks really great along with the new mono amps. A welcome addition is the high-level input, making it easy to connect the amplifier for those who do not want or cannot change the stereo.