The Epicenter Micro is the ultimate "active line output converter". It is much more than that though.
The Micro can take input signals from a factory radio (non-amplified, or amplified) or aftermarket radios. It has a line driver built in, so it gives your subwoofers the best signal possible. It also has the legendary epicenter effect..... To put it simple, it can add bass to your music, that was lost in the recording or compression process. This is controlled by a dash mounted knob, which serves as your subwoofer level control as well as seperate Epicenter effect