I was reading an article about amps in general. A section on Preamp valves / tubes caught my attention.
It mentioned the commonly used 12AX7 (ECC83)which it referred to as a "high gain" design. They mentioned earlier Fender amps being fitted with a lower gain 12AY7. My interest was further aroused when it mentions SRV favouring the 5751 (another low gain substitute).
It sounded it would suit me to replace "sizzly compressed distortion" (their words) of hotter preamp valves for what was described as "more punch and clarity" to be experienced with low gain valves.
I've certainly always been impressed by the clarity of SRVs sound even when there appears to be a high level of overdrive. Is that clarity in part due to these valves?
The Fender VibroChamp XD I use has a 12AX7 so it is making me wonder .....
Anyone done a valve change with this sort of resulting tone change in mind or just generally had experience of low gain preamp valves?