micing an amp

what's the best way to mic a combo amp with 1 or 2 12" speakers, as far as mic placement? I have an SM57 mic, but I've only used it for vocals and acoustic guitar so far. Also I've got my eye's (and ears) on a Marshall TSL122 2x12 combo which has 2 different speakers. what would be the best way to record that? I've thought about getting another mic so I can have one at the speaker and the other a few feet away. Is that a good way to go? If so, what's a good not too expensive mic for that? I'm tired of using amp modelers for recording, so it's time to step up to the real thing. anymore advice?

I have a uni-directional mic and position it about 6-10inches away from the speaker, and I find I get really good results. Lowers the volume of any buzzing on the recording. I don't know what would happen if I moved it real close, or far away....a la Jimmy Page.

I use a SURE sm-57 also. It sounds best placed perpendicular to the cone of the speaker (2-3 inches) away. The preamp your microphone plugs into has as much of an effect on the recording quality as the microphone itself.

If you can get some isolation headphones then stick the mic through the cans and experiment with different positions and angles until you find one you like.

i like setting up 2 mics, 1 about 3 inches away to get the really cutting sound but also one about 6 feet away 6 foot up and pointing at the speaker. i do this simply because i feel it can give a more "live" sound also the room accoustics can add more warmth/atmosphere to the sound. Try that and see what u think.

cheers

whenever using more than 1 mic on the same sound source, you always want to becareful of phase problems. If you notice that the sound is thin and wimpy, flip the phase on one of the tracks in your software or position the mics differently until you hear a full, rich sound.