On Fri, 6 Apr 2012 19:43:25 +0100, "TonyL"
wrote:

I have a couple of 12" drivers sitting around doing nothing in the loft.
They are of unknown manufacture with rubber surrounds and (from memory) are
rated at 100Watts or similar. I forget the nominal impedance but they were
fairly standard. I was wondering if it is worthwhile installing them in a
sealed (not ported) enclosure and driving them from a couple of proprietary
ss modules and lp filters as a subwoofer system. I don't especially want to
get involved in T/S parameters and volume calculations and I don't want a
'boom box'...just clean extended bass. Can I just assume the bigger the
better for the enclosure? I would probably use MDF or plywood with braced
sides.


Unidentified drivers? Have a good look at them first, particularly the
cone surround. If they are of corrugated paper, you are unlikely to
get any useful bass extension out of them. If they are foam or a
rubber roll, give them a go. You won't go far wrong with a large box,
although you might get better results from measuring the Thiele-Small
parameters and designing a proper box.

How involved do you want to get?

d