I recently acquired a fender Princeton reverb reissue in fudge brownie tolex with a Jensen p10q speaker. Overall it sounds really great clean. And I chose this over a 68 custom Princeton reverb for the clean tone. However after having it for about a month, I find that I'm getting a lot of Fizz with overdrive. And particularly when I use my fulltone OCD pedal and even with my Ibanez ts9 at higher gain settings. I'm not sure if this is due to the Princeton reverb just having issues with overdrive or if it has to do with the speaker selection. I am thinking about putting a celestion 10 30 speaker in it, as it is a cheap speaker. and I could try out a celestion in its place. This the speaker used in the 68 custom Princeton reverb by the way. I'm wondering if anyone else has any other suggestions to make the overdrive smoother and more pleasant??... For your information I'm using an American Standard Stratocaster with 57/62 pickups and also a 52 reissue Telecaster stock. And a Gibson Les Paul with classic 57 pickups. The Strat and the tele do better with less Fizz but the Gibson with the higher output definitely fizzes out more with overdrive.