Ready to seriously upgrade your car's sound system without breaking the bank? The Pioneer GMA6604 is a rock-solid 4-channel Class AB amplifier from their trusted GM Series. Here's what it packs: a solid 60 watts RMS per channel at 4 ohms, or 90 watts RMS at 2 ohms. Need more power for subs? You can bridge it to deliver 180 watts RMS x 2 channels at 4 ohms. It also features a variable bass boost control (from 0 to +12 dB at 50 Hz) to really make your lows punch. It's super versatile, supporting 4-channel, 3-channel, 2-channel, or even mono operation, so you can power door speakers, rear deck speakers, and a subwoofer all from one compact unit. With a peak power rating of 760 watts, it delivers clear, powerful sound that'll make your music come alive. It's the perfect step-up amp for anyone looking to get more out of their factory or aftermarket speakers. Just add some quality wiring and you're set for a much better drive.