So last October my 2005 Fender Deville was dropped on its face. I checked the tubes and everything works as it should. There is just one problem. Any time I play it there is a strange extremely high pitched whistle-like ringing from the amp specifically. I don't know if its the speakers, the reverb, the tubes, my tele. Although it does it with other guitars the most pronounced is the tele. Suggestions? Also, i am seriously considering replacing the stock fender-designed eminence built made in china speakers with something else...maybe Celestion vintage 30's or Celestion Rocket 50's. If I could get a set Peavey Black Widows, I would probably put them in there just on the principle that I like those speakers better than any other 12" I've ever played period. Hopefully paired with some better tubes. Not a huge fan of Groove Tubes. Although maybe she just needs to be re-biased. I don't really want to get rid of it because its my normal backup and super-saturation tone when called for (Not very often. although if I ever get to play Jesus Christ: Superstar that would probably be amp number one on the list.). Its also my very first amp. 60 watts was a little much for a bedroom amp when I was in high school but it gets used in live settings. Like I said I don't want to get rid of it. It would also be nice to get a slightly more "Britishy-tone" from it as well. Although I suspect that would involve a totally different tube set and circuit. Thoughts?