I fitted one of these last week after waiting ages for them to come into stock.

I must say I'm very impressed. It's mounted in the side of the boot of my estate behind the amp (I'll take pics soon!).

I have the gain on less than half and the high pass filter cutting out most of the bass to the front speakers. Back speakers are disconnected. The sound quality is unbelievable compared to how it was.

So clear, I'm hearing things in my mp3s that I never noticed before.

Trouble is I keep skipping from track to track to hear how good things sound!

The amp is here:

Sub's behind it out of sight