[Builder Brad]

Hi There,

I have 4 subs that have been built to the spec laid out by Siegfried Linkwitz. More details can be found here:

http://www.linkwitzlab.com/thor-intro.htm

the drivers used are the Peerless 12" ELS part no 830500.

If you do a search on ebay UK for the part no  - 830500 you will see all of the details and history of these speakers.

Thank-you