Frank Carvalho wrote:I believe the majority of Fender amps use negative feedback to achieve the clean signature Fender sound. Marshall used it too, while Vox AC30 amps so do not. It's one of those things that are important to the final amp sound. On Vox' original blue series Valvetronix, the negative feedback loop was variable, depending on the amp model, which meant feedback on Fender models, no feedback on Vox models etc., and this made the amp models feel very realistic.
I never had any dealings with fender amps, but the marshals were about 50-50. Also the NFB style used on those that had it was rather strange, and depended a lot on the age of the valves as to weather it was effective at all. You have to be very careful about NFB on amps with lovely phase-shifting transfomers and capacitive coupling