Hmmm... interesting. So those are just the plans eh, you buy all the materials separate? One question, when building a DIY subwoofer, when you buy a plate amp do they come with crossovers built into them, or do you have to build a crossover for it as well? Because building the box, installing some speakers, running the wire and connecting it to a decent plate amp would not be that hard to do. But it I had to build a crossover on top of all that, then I might start to feel a bit overwhelmed.

I have no idea at all on how to build a crossover.

My Stuff :

M80's
QS8's
VP150
EP800
Denon 4802
Emotiva XPA-3
Samsung BD-P3600
Sharp 65 Inch Aquos LCD