The 4-channel GM-4300F delivers a grinding 400 watts max (40 watts x 4 or 100 watts x 2 at 4 ohms; 50 watts x 4 at 2 ohms) — 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.