Eventually, I will get some GR Research AV/1s. But first I'm going to build my first DIY sub. I want it to be a good match for the AV/1s. It will be a music setup, 2 AV/1s and 1 sub. What kind of DIY sub would be a good match for the AV/1s? I'd rather it be smaller than larger and the amp for the sub should be able to power the AV/1s; the amp doesn't have to built into the sub. I'm not as interested in playing loud as I am in it sounding really tight at medium volumes. And, finally, I'd like the cost of the parts to be between $300 and $400. If at all possible/feasible It'd be neat to have a colored sub driver - yellow, blue, silver, etc. Dumb, perhaps, but I really like the way it looks.