I own a Fender Twin Custom 15, essentially an 85 watt twin reissue 65 with an Eminence 15 speaker. I'm perfectly happy with the sound of this amp: extremely clean, fantastic low end and sparkling high end.. The only missing side, just to find one, is the middle range.. That's why I'm thinking about pairing a 2x12 cabinet to the 15 speaker. I already divided the amp into head and cabinet so I'd like to know what kind of 12 speaker you suggest to combine with the 15 or just to use alone with the head.. Finally I want to have three one speaker cabinets: one with the original 15 and two with the 12 speakers. I'm thinking about the EVM12L or the Eminence Swamp Thang. The amp is a 4 ohm. The 12s are both 8 ohm. The in-built 15 is a 4 ohm. How to combine them without blowing the transformer? Any suggestion about the speakers? Any help is welcome!