Preamp difference : if it's not the frequency, not the slew rate, and not the harmonics, what is it ?

[s wave]

I think it was song writing seminarist Ralph Murphy who said most everything sounds good late at night. 'What you want to do is for it to sound good at 7:00am when driving a car in the rain and your late bringing your kids to school.'

 

[PermO]

If you are allready late at 0700am, you're not a sound engineer