These three models are compatible with our Block Series heads (Tone Block 202, OverDrive 202 and 101 Reverb) as well as the Mach 3 head.  


However, do note that only the Block Series heads can fit in the slot in the back of the cabinet. If you intend on pairing one of these with a Mach 3 head, the head will only be able to sit on top of the cabinet.