I have been searching for the answer to that question for a while now, and I don't know either. It really sounds like EMG 81s driving the rhythm channel of a 5150 to me, though, and I'm guessing a cab with Vintage 30s was used, either with 2 mics (at least one of which was pretty far off-axis) or with some drastic EQ to get that ~2 kHz spike like that with the 3.5 k underneath it, or maybe both. Although, looking at the grillecloth on Fredrik Nordström's Marshall cab underneath his 5150, it might be Greenbacks. All of that's just speculation, though, and I would appreciate some hard info just as much as OzNimbus.
