I'm thinking of adding a subwoofer to my main speakers (Dynaudio 52s),
and I'd like to have a go at building one. Bit of background info:

Room is about 16' x 12' -
http://www.ifyoucan.org.uk/music/pics/musicroom.jpg
I don't want massive bass, just something to fill the missing bottom
bit, and an intro to DIY audio.

I can pay say 500UKP, but prefer less.

I like the look of
http://www.iplacoustics.co.uk/ipl_sw..._subwoofer.htm

I had a cheapish REL for a while, but found it rather 'one note'.

My woodworking skills are pretty basic, but I seem to pick things up by
doing. I fancy this as a primer for some Keith G-type horns - a taster
to see if I can screw 6 bits of wood together :-)

Any recommendations welcome.

Rob