Someone recently was inquiring about mods for the Vox Pathfinder 15/15r amps and I had a look see at what could be done to improve the amp a bit. There seems to be a consensus (myself included) that the gain control is, well pretty useless as the distortion is less than favorable. Also the output is just there and not quite up to task to bring to a gig. I looked at the early schematic that's out on the web and found they used a square wave shunt clipper in the form of two LEDs right in the main signal path. Good in some fuzz circuits, I've never really liked them in amps. They have a high insertion loss (loss in gain = output db's) and I've never liked what they yielded as far as distortion when used in amps, certain fuzzes yes. Super simple mod here. Unsolder the two red LEDs shown in the photo and remove them for a noticeable increase in gain/headroom and a better sounding breakup. I'm not saying that the distortion is going to be just like yer favorite old tube amp but I found it much more pleasing to the ear than the LED sw clipper in this amp (use a tube screamer for something better if you really can't do without). Combine this mod with a Jensen C8r and whoa Nelly! Where the amp was maybe barely able to keep up with a loud drummer completely max out you should be able to keep up with some headroom to spare. I noticed a decent increase in gain ala output db's. Might even make a good small club amp (just did this today yet to try it in those duties)? Report back tell me what you think. Easily reversible but I don't think you will. Disclaimer: Make sure you discharge those filter caps. Don't shoot your eye out kid.