I'm not inclined to take 'tweaking' seriously. I suppose its because when I pay a good price for my stereo system, I believe that it ought to perform at its optimum level just as it is....and yet I do realize that other variants affect the sound....things like room size etc. I have my Orsa speakers sitting on end tables and everything seems to be all right - but I sometimes wonder if anyone has ever experimented with putting marble slabs under their small speakers or some other material that absorbs vibrations...Are there any audio afficianados out there who has tried putting marble under book shelf speakers? I read that someplace, I'm not sure where, and I wouldn't mind trying it but I thought there might be someone who has already done the experiment. Any takers?