Power for clarity JBL has been designing and building sound systems for decades, so they know a thing or two about power. Their GX-A602 2-channel amplifier can send 60 watts RMS to each of your speakers, about five times the power of most factory radios. The GX-A602 includes speaker-level inputs, so it's perfect for upgrading the power in a factory system. Versatile tone filters – versatile amp You can also use the GX-A602 in bridged, one-channel mode to power a subwoofer with up to 170 watts RMS. A high-pass filter cleans up the sound by removing extreme low bass from small full-range speakers, allowing them to play louder and cleaner. You can also switch the filter to low-pass mode when you're driving a subwoofer, while the built-in bass boost adds some punch when you're in the mood.