Well, from just the specs, you can compare this 6G10 Harvard model to the more typical 5F10 model: Fender Amp Field Guide – Fender Harvard Amplifier And you can find the historical impact differences from Wikipedia, but of course: Wikipedia – Fender Harvard I believe the operative phrase for the 6G10 was “Rare as Hen’s … More Fender’s Ivy League Amps – the Prom Queens and the Drop Out