So I haven't been here in awhile but I am seeking help from you pro's yet again. Obviously, any good studio has a couple of good DI boxes. But what if you DON'T have one. Not that I have a studio. But heres the situation. Lets say there is this guitarist, he has his rig set up perfectly the way he likes it. He has a 4x12 cab, quite common for metal and rock. I ask him if I can mess with his settings to get a better sound for recording because his sound is more tuned towards live performances. He's totally cool with it, and when I ask him to record a few tracks under the new settings, he sounds pretty brutal rather than muddy and overly distorted like it was before. Even though I changed his settings appropriately to better match a recording, and although I am using an SM57, I still feel that it is coming out too muddy. Recording with a 1x12 is cleaner, especially with the size of the room, more like the size of a standard living room. Why? It seems that with the 4x12, the 3 other speakers that are NOT mic'ed are hitting the mic at different times, even if it is within millisecond, it is causing an effect that is naturally muddying up the sound. So here I ask, what do I do? I've never tried this so I'm not too sure. I couldn't run any outs from his amp head to my interface could I? Would the signal have to be converted to high output XLR? So in other words I would need to DI the guitar rather than recording via mic. Could I record the guitar clean and run that track through the head? I feel like I should know this but I've never had to do this before. I suppose I should invest in a radial DI... But any other suggestions? Thanks!