I've always wondered why the more modern Fender tube amps are commonly designed around an 8/4 ohm OT and the Peaveys (classic series in particular) more so designed around 16/8 ohm OT. Does anyone have insight as to the reasoning behind this? Is it a technical reason or just designer's choice? I like to sometimes use extension cabs with combos and having started accumulating 8 ohm cabs to use with my Fenders, it's caused me to pass on the Delta Blues which I've had an interest for some time. Please stick to matched impedance discussions, unless you believe mismatches to be the driving force.