I have a champ 25 PR202 I play Harmonica and had all sorts of problems with feed back during gigs. Lucky my bullet had a long cord on it as sometimes I found myself off stage. After a bit of playing around I threw a mic in front it annd ran it through the mix. Problem sorted

Beautiful sounding amp. I replaced the speaker with a private Jack and put some Old sovteck tubes in and man this thing is impressive. I love the way the volume ratchets up slowly once you get to 3 or 4. I use the dirty channel with a wampler distortion and turn the gain down low and volume up and it barks. Using the dirty channel by itself isn’t very effective. I also put some kaish cream knobs on. It looks much better and is a lot easier to see. My eyes are getting bad. The amp is a perfect size and power and can do just about anything you need it to do. Glad I found this baby. It was a long time coming.

I bought mine used and somewhat battered at a pawn shop who had it a year after I first saw it. After showing them my pictures dated a year earlier they came down from $199 to $125. It seemed to have the original tubes and speaker and sounded good but not great. I swapped in (2) 6l6 and 1 lowest gain 12AX7 and it sounded enormously better. Nine months later I swapped in a Eminence Tonkerlite both for the tone (had one before) and lightness. It now sounds as good as anything I have heard. TRICK Plug your high output guitar (I have two Railhammers into the right hand (lower input) jack and you can get anything from Mesa (Santana) sounds and Neil Schon sounds to clean Fender cleans Rolling Stones 38 Special sounds. Tweak the distortion channel gain and contour to get the sound you want. I have yet to plug my AMT SS-20 and Polysaturator by Pigtronix (with modified ICs) into the clean circuit but expect it to sound great,

I have a Champ 25 PR202 which got from my brother 4 years ago. He loved the clean channel and never used the distortion circuit. (jazz). I love the clean sound but can’t raise the volume or gain pots beyond 3 or the unit starts to oscillate and howl. Installed new tubes to no avail. One thing I have noticed is that the circuit board directly over two Zener diodes is blackened. They are 1N5353B. Do Zeners overheat before they fail or do they just quit.

I have had one myself for like 20 years… I did scale the speaker to a Jensen, and have been using different mullard tubes… I consider it has all the Fender clean magic… Clean is the only channel I use, since I really dislike the distortion one… It is indeed an underrated unit… I certainly won’t get rid of mine… I am struggling to find out how to use a Bugera power attenuator with it, since I want to get max tube sound at bedroom level…