DESC: SquareTrade © AP6.0 Pioneer GM6400F GM-6400F 4-Channel Power Amplifier 600 watts Get it for less only at Lessco Electronics The 4-channel GM-6400F delivers a whopping 600 watts - plenty of juice to power your high-quality speakers. It's also got built-in 4-channel crossovers. Speaker level inputs for easy connection to an OEM headunit. Oversized power terminals. And a wide input level of 400mV to 6.5V.Pioneer is constantly finding ways to make amplifier technology better.