I just picked up these one owner IRS Betas that are in fantastic condition. There isn't a nick or scuff to be found on any of the cabinets. They came in the original boxes and still have the original packaging, both sets of feet, Servo control, and all paperwork. The sound is beyond my expectations. At louder volumes, I've noticed a couple of things that need to be addressed, but at the price I paid I am not concerned. First, one of the woofers (non-servo) vibrates at louder volume. It may be a voice coil. Should I just replace it or try to have it serviced? Second, one of the EMIM/mid range units material seems to no longer be perfectly flat and at louder volumes you can see it vibrate. It sounds great, maybe a little louder than the other one but it can be adjusted with the controls. Lastly, both EMIT/rear tweets are partially taped over which results in very low output. I take it this was done by the previous owner. Any idea why? Too much treble wall bounce perhaps? Any advice would be greatly appreciated.