Try micing it with the 57 at the center of the cone. If it sounds too sharp, back off the treble and add more middle or take a narrow Q valued eq and cut off 10khz or something that makes it fizzy or hissy. I nowadays try to make the guitar almost too bright or sharp in the studio with my monitors so It could sound good at somewhere else. I mean it sounds really good with the monitors but it would be a tad nicer to hear fewer high's on the monitors but anywhere else it lacks 'em.
A good way to test if the mics are in phase:
flip the second mics phase. Take a pair of headphones and put 'em LOUD.
take a distortion pedal or something to make the amp produce a stale noise(but keep your guitar's volume to 0).
turn up the preamp gain ALOT. I'm assuming you've used the 57 first and checked if the sound is good or shit...
add the second mic: make sure you have enough gain to have the preamps almost peaking so you hear noise only from your headphones. move it around the speaker cone and search for a spot where the noise/hum/anything disappears. the point where there is minimum hiss/noise, your mic is most in phase. Now flip your 2nd mic's phase back to normal. now you have 2 mics in phase in front of an amp!
the mics have to be at equal volume. Have fun! (still, I recommend using only one mic. A 57 for fuck's sake!)
A good way to test if the mics are in phase:
flip the second mics phase. Take a pair of headphones and put 'em LOUD.
take a distortion pedal or something to make the amp produce a stale noise(but keep your guitar's volume to 0).
turn up the preamp gain ALOT. I'm assuming you've used the 57 first and checked if the sound is good or shit...
add the second mic: make sure you have enough gain to have the preamps almost peaking so you hear noise only from your headphones. move it around the speaker cone and search for a spot where the noise/hum/anything disappears. the point where there is minimum hiss/noise, your mic is most in phase. Now flip your 2nd mic's phase back to normal. now you have 2 mics in phase in front of an amp!
the mics have to be at equal volume. Have fun! (still, I recommend using only one mic. A 57 for fuck's sake!)