So you have an amp that has no crossovers or you hate the frequencies that your amp gives you? Well be a Boss and make your own damn frequency god damn it! That’s right! For the low price of $20 bucks, you can slap this puppy wherever your car allows, feed it the 12 volts that it needs, and plug this baby in between your deck and the amp. So disconnect the rcas that’s going into your amp, and plug them to this shiznette and then whip out another set of rca cables and plug that to the output port from this boy and into the amps pee hole. If that sounds too complicated, then ignore this ad and just buy one of my amps that have the built in crossovers. Cuz this equallizer is for those picky music listeners who wants to tone down the bass and tune up the highs.