I just got a Rythmik F12G sub (upgrade from a Pinnacle Baby Boomer) and I'm loving it. I have it on spikes which are on coins on my hardwood floor. I'd like to replace the coins with something cooler so I checked out Herbie's site but all of his stuff seems to be geared toward decoupling. In my experiments, decoupling works great for all audio components (I use Townshend Seismic Pods) but it does hurt performance when applied to the bass driver. For this reason I think I want to couple the subwoofer to the floor as opposed to decoupling it. Everything in audio seems to involve a series of tradeoffs and there is very likely some performance gain to be had by preventing micro-vibrations from the ground from affecting the sub (decoupling). However, in my experience, for bass performance, the performance gain enjoyed by coupling the sub to the floor would clearly outweigh it. I called Herbie's and the guy there was convinced that decoupling is the only answer so I wanted to check with you guys on this.