1964 Fender Princeton Amp - Weber Mass 150 Attenuator Demo

Just got some great Kimber speaker cables from Lava today, so I connected the Weber Mass 150 Attenuator with the 1964 Fender Princeton (transitional, it has Brownface innards) to prove that a Princeton can growl with the best of them when cranked! 1965 Guild Starfire II Special doing the guitar duties. No effects, just Guitar to Amp to Attenuator to Speaker (that feedback at the end warbles when I turn on the amp&tremolo unit tho!