Re: Angus Young vs Pearly Gates
Its true: the AY sign. has not been met with much acclaim. Angus himself is not the best authority on his gear. I read an article somewhere by an obsessed tonechanger who made a compelling case for Angus' having around 11 or 12 Ohm DC, not just 7. So my beAst guess would be A5 in a Seth or Antiquity, possibly an A8 if you want to sound ballsy under 50watts. But that would compromise the upper mid character, which would go best with a quality warm mahogany guitar (pref no maple cap). And I'd bet the right brand & gauge of strings would go a long way.
One cheat I've showed students who want his meaty chunk is to turn the guitar vol pot to 7.5 then readjust the amp to compensate the reduced treble & gain.
All of these would be more beneficial than the AY sig itself, based on all the reviews I've read.