My interior speaker amp does not an have adjustable crossover. It's just low, high, or full. I don't have component sets so I added a Coustic XM-6 powered x-over so the bass on my interior speakers is just where I want it. The only problem is, when I added this x-over to my system, it brought alternator whine along with it, which I didn't have before I added it. So I wanna get rid of it. I added ground loop isolators and they helped, but are too bulky behind the dash. So I wanna get rid of those as well.

 

If I am not mistaken, the D2 has a built-in adjustable cross-over, correct? Will it perform as good as my Coustic? All I need it for is to cut low bass frequencies to my interior speakers so they don't distort. Is it any good?