We compare a Marshall 50W Master Volume (2204) 1x12 combo to it's half stack counterpart.The combo is a JCM800 4010 (2204) with a 1971 G12H30 55Hz Greenback and the half stack is a 1977 JMP 2204 with a 1971 Marshall 1960A with stock G12M25 75Hz Greenbacks. All speakers have Pulsonic Cones. I'm using a 1973 Fender Stratocaster with 1976 Pickups.