The KAC-8403 amplifier delivers 60 watts RMS by 4 channels, ideal for improving the performance of the front and rear full-range speakers in your system. You'll hear all the details in your music, from the slide of a finger on an acoustic guitar to the subtle tones of your favorite singer's voice. Looking for some bass? The KAC-8403 will power up a couple of subs with 180 watts of power each. Use the variable high- and low-pass filters to choose the frequencies that your speakers receive, while a bass boost lets you pump up the lows on channels 3 and 4. The KAC-8403 includes speaker-level inputs for hook-up to your factory stereo. You'll appreciate the preamp outputs that allow you to daisy-chain an additional amp to this one. minimize