dirtydean:Has anybody put spikes on their woofer and noticed a diffrence???Yes, I did. The sub that came with the KEF3005SE's (HTB2 - the doughnut shaped one) had sticky rubber feet on it, which sort of rocked around on the carpet/underlay/chipboard floor. I changed the sticky feet for spikes to anchor it through the carpet into the chipboard. Subjectively, it improved it greatly in terms of articulation/detail and blending (with the satellite speakers) rather than making it sound any deeper as such (as was also the case with a REL subwoofer that I had before it). But proper positioning, running in for a lengthy period, and decent cables (mains and signal/input) also had a significant impact on its performance too. To avoid any arguments here, "improved greatly" and "significant impact" are relative terms, by which I mean the improvements were, in my opinion, very worthwhile for the cost/time expended!