Distantly related to the FE103 in a bookshelf:
Bottlehead describes what he calls the "SEXy" speakers, intended to be used wit the "SEX" amp kit (2WPC 6DN7 SET), or any low-powered amp.
Basically install a Fostex FE166E into a sealed a Parts Express 0.25 cubic foot enclosure. (actually, do this twice). Yellow_Light_Colorz_PDT_08
The only "dog work" is routing out the hole to fit the speaker, which really should be done with a plunge router and a circle jig. The replacement front baffles are inexpensive, so if you goof, it's only about 8 bucks and a few cuss words to try again Yellow_Light_Colorz_PDT_01
Install two binding posts, wire it up, and throw in a little bit of "stuffing".
Frequency response will be from about 100 Hz to 20 KHz, after initial break-in. A simple BSC line-level network is described, for those who want tofine-tune the response.
If you want / need deper bass response, use these in conjunction wit a 10 inch, approx 100 watt powered subwoofer. I mostly use these without the subs, they're just about perfect, as-is, for most acoustic music.
All the technical details can be found here:
http://www.bottlehead.com/loosep/S.E.Xy%20speakers.html
Picture (from the BH site) with the Dayton powered Subwoofer:
(since I was too doggone lazy to take the photo myself, and now they're down in my NC place)
/ed B in NH