2001impala, I also use a Velodyne sub. I installed four PolyCrystal speaker spikes in place of the rubber feet. WOW what an improvement! I think any brand of good quality spike would work well. (If anyones interested I have 6 used PolyCrystal speaker spikes left that I would let go very inexpensively. Email me if your interested). There are also other posts on file regarding the same question. Good luck.
spikes under a subwoofer ?
I recently purchased a Velodyne HGS-18 Series 2. Although mates very well with my main speakers, I've read that adding spikes generally providers deeper bass response as well as greater clearity. Does anyone else have any suggestions as to what I could place under the subwoofer that would pierce carpet.