In this video we put a 15" Celestion Fullback into a 12" Marshall DSL40C Combo. To be able to do that the baffle is sawed up to fit the bigger speaker. I'm using a Gibson Les Paul 1959 Reissue and a Gibson SG Standard (with a GFS P90 in the neck). With the LP I push the amp with a treble booster (K&B Range II) on many of the riffs. The tone and dynamics completely blew me away. Don't miss this one. Cheers