I bought a new 65 PRRI today. It was the floor model, but that didn't bother me, as it's still under warranty, and the shop is a small boutique shop that doesn't get Guitar Center-like traffic. Also, since it's a Fender Princeton, I doubted highly that any metal heads cranked this thing to demo it. Anyway, the amp sounds amazing. But, if I have the volume above 7, and the reverb above 6 or so (which honestly, I would likely never do in a real playing situation), the reverb begins to give feedback. As the feedback was growing, I made the mistake of turning the reverb UP, and it grew instantly into a squeal that killed my (and my dog's) ears. Anyway, should I be getting any feedback at all with a new 65 Princeton Reverb Reissue? This is my first tube amp, so I am not sure what to expect. Overall, the amp is so good, that I really don't want to return it. Or, maybe there is another solution? Maybe it can be easily remedied some other way? Any advice would be great. Thanks so much!