I searched for this, and no dice. I have a nice little tube amp. I get an awesome fuzz tone when I push it (REALLY push it) and it sounds great for practice. I would like to get this tone live, but it wouldn't be practical at 5w....... I've looked at various speaker DIs, mostly at the Countryman 85 and the new Markbass DI. While they are both designed to be used as speaker DIs as well as instrument DIs, the input impedance on the MB is 600 ohms and the 85 is 10k ohms IIRC. My main question is this: Is it okay to run my amp into this as long as I have the correct load (8 ohms, in this case) attached to the through jack? At $70, the MB is very tempting. Also: I have a 20w thermal guitar speaker that sounds hideous lying around - If I cannibalize it for the voice coil, can I put it in a box and use it as an 8 ohm dummy load for this amp? Also: Is a speaker DI hard to DIY? I imagine it would be, with the complex transformer and all, but I figured I'd ask.