OK, after about 3 days, I'm finally done installing my amp! If I do say so myself, I did a freaking awesome job. NO wires are visible until they come straight up to the amp on the back of the seat. Also, when I was going to buy a fuse, I found a Dynamat Original speaker kit on sale for $7, so I put that on around my speakers. Except for the tweeters on the doors and my HU, my car still looks completely stock. Unless you folded the back seat down, you'd never know I have an amp back there. This is very exciting. Now, this is the part where I'm stuck. I don't know how to adjust my amp. I turned the gain all the way down, then started to turn my HU almost all the way up so I could adjust the gain until I heard distortion. But even with the gain all the way down, at about 2/3 volume, any kind of bass distorts horribly. I have my HU crossover set at 63Hz, and it does the same thing at 80. Turning the gain up or down doesn't seem to make any difference at all. I thought turning the gain up would make it louder. Am I doing something wrong?