This is the 1960TV 4×12 cab from the Austrian pro-guitarist Conrad Schrenk. Made in the early 80s and loaded with Celestion™ Greenback G12M (25 Watt) speakers, this babe has seen hundreds of stages and clubs. The original mono-input was replaced some time ago by a stereo/mono panel for more flexibility.
This cab is ideal for all styles of rock. But its main area of use is Classic Rock/Hard Rock.
Resonance frequency: 108 Hz.