After seeing the choices available in subs and the costs, I started thinking about building my own. I pretty much have figured out what I'm going to build: a sealed sub 12 or 15 inch driver (probably 15... I want it to dig deep!) accurate bass rather than "boomy", ie better for music than HT fairly high power plate amp (300 to 500 W is what I'm aiming for) classic, square construction from MDF rather than sonotube To simplify (probably a lot) that would mean I have to build the enclosure, buy a plate amp and the proper driver for that, any crossovers etc are already in the amp... right? My problem right now is that I'm not sure what I am looking for when it comes to the driver. What characteristics should a good driver for a closed box like this have? I'm still at the point where I'm not 100% up to speed what all the specs on a data sheet for a driver means, but I'm studying everything I can get my hands on. ------------------ /Kimmo "Don't tell me; we're about to go over a huge waterfall?" "Yep." "Sharp rocks at the bottom?" "Most likely." "Bring it on."