The Rockner Ir Pack is based on the Bogner 412SL 4×12 guitar cab loaded with British Celestion V30’s. The epitome of thunderous rockin’ tone. Chunky bass response, rich, fat midrange with an articulate top end. With a collection of 18 different microphones we came up with some unique blends and the best high gain guitar tones you could possibly wish for, giving you instant access to the legendary Bogner tone.