The 425A and the 425B are the associated cabinets in this range as per Marshall's traditional 4x12 design. The speakers used in this mono/stereo switchable 4x12"s are the brand new G12C 25 Watt Celestion Greenbacks. These were specifically developed for the Limited Edition Jimi Hendrix Super100JH stack and are voiced to give that rich and balanced harmonic timbre that complements vintage tone and therefore the Vintage Modern Series perfectly.