Thank you for your hellpful indsight, regarding my good old eighties V 15`teens. I did not entirely cut the brown lead. Instead i drilled a switch into the alu chassis, so I could turn the negative feedback on again if needed. An so I have with the one of them, that suffered from microfony. Regarding my Vox ccx1....I found it too harsh and sharp in treble to my ears, and have done a modification on it. These new amps all have a bright capacitor sitting in parallel....mine at position C26 on the Pcb board. By cutting the one leg, pushing the cap back a little, I have got quite a different beast now. Much more creamy and warm, and still with all the chime and power when needed. The old AC fifteens did not have this capacitor. This is a newer invention in order to add treble at lower volume, But actually the treble follows up to a degree of volume, that makes it a bit annoying when playing minor venues. So I do consider this rather mod for being very successful, and I am very pleased with the result
This 80s vox combo is very much in the marshall 18 watt camp rather than the ac15 camp. She features a JCM800ish preamp stapled to a dual el84 power section that incorporates negative feedback.... stock it sounds okay, not terribly voxy and a little stiff. If you adjust some component values you can get it to sound a bit like a Marshall 18 or 20 watter or if you lift the negative feedback loop completely it will get more ac15 character, though due to its marshally preamp topology it will still do its own thing. I really want to pick one of these up and perform some surgery. They are very affordable vox combos that fly way udner the radar.