Hey dudes... Any of you superior amp techs want to take a crack at solving a dilemma? I've been reading Dave Hunter's new book "The Guiar Amp Handbook", and some inspiration hit me. So now I'm I'm trying to solve a riddle with respect to the design of my Engl Classic combo. The Engl Classic has a gorgeous clean channel, but the overdrive channel is an icepick. Harsh to no end. So, I located its schematic and started comparing it to other amps. I've come to the following conclusions regarding the amp's design. Apparently, things are fairly standard for the most part. Preamp gain stages are pretty close to Fender. Cathode and plate circuit configs are fairly standard, like a Twin or Bassman (100k plate resistor, 1.5k ohm cathode resistor & 22uF cathode bypass cap). I haven't dissected what's between these gain stages yet, however! The tone stack is very similar (almost identical) to 5F6-A Bassman. The PI circuit is virtually identical to that of a Mesa MkIIB. The power section appears pretty standard, with 6L6 tubes for 50 watts. One thing I've noticed is the absense of a "grid stopper" resistor on the input. I'm finding most amps have a 68k resistor on the input - not this Engl. I'm not claiming this is the problem, but it's just one thing that stands out. Another thing that's obvious is how busy it is. Being loaded with features, there is lots of extra stuff in there to account for bright/deep switches, switching, reverb, and the recording out circuit. Can someone shed a light on this? Any ideas as to where this harshness is coming from? If you want to take a look, I've included a link to the schematic below. http://www.tonecentral.net/gearpics/Engl_Classic_E350_schematic.pdf I'm trying to tame the gain channel, so I'm considering manipulating the values on V1B, which serves as a footswitch selectable gain stage. Particularly the capacitor/resistor off of the cathode. Perhaps I can revoice this stage to dial out or tame the hashness a bit. Thanks tons - any help is appreciated! EDIT: Am I trying to polish a turd here? Maybe it's a lost cause?