These are perfect for anything with an M8 thread. I used these on a pair of Rocket 850s so they wouldn't sit on the hardwood floors and resonate in the empty basement. They actually helped to tighten up the bass.
They are very similar to the spikes/feet that are included with the Swan towers as the "spike" and disc are all one piece.
For Sale are 2 sets (4 feet in each set - in original packaging) of the Spike 4 found here:
http://www.taylorsales.com/SuperSpikes.htmRegular retail is $67.95 per set or $135.90 for both.
These can be yours for $100 shipped in the lower 48.
