I've been interested in building a very nice musical subwoofer for my 2-channel system that digs down to 30 Hz. Here's what I'd want -- A lightening fast passive sub (or two!) in a smallish rectangular box driven by a monoblock (or 2-channel amp if I had two subs). Now, the issue becomes the crossover. I would need a very high quality crossover that doesn't add any coloration. Anyone ever experiment with pro crossovers?
OK, so here's the punchline -- I'd have to acquire all of this stuff (driver(s), amp and crossover) for under $500 for a single new or used sub. Something like this:
Marantz monoblock: $175
MDF, etc.: $75
The reason I say $500 is because beyond $500 it would probably be more cost effective for me to buy a new or used sub for $500 - $750. I'm also interested in employing 8" drivers. Room is 12 x 17 x 8.
Any ideas would be greatly appreciated.