Smooth but Aggressive breakup on this 1967 Marshall Plexi Model 1992 Superbass. We play it through a 1971 Marshall 1960B cab with G12M25 75Hz Celestion Pulsonic Greenbacks. Sennheiser MD421 U5 Close Mic and AKG C451e Room Mic. We couldn’t identify the output transformer which is not original so we would really appreciate some feedback on that one.