Bogner Uberschall Mk2 100-watt Tube Head - 6L6 Version | Sweetwater
The Bogner Uberschall Distortion Pedal is truly an amplifier in stompbox format. It is built following the design of … | Distortion pedal, Distortion, Guitar pedals
Uberschall: A Study In Gain Pt. 1 (Bogner vs. Diezel) - YouTube