thanks for your detailed reply.
would 2" help at all, or would the carpeting/raised floor?
yes, the reason is mostly because of timing: i couldn't put the amp in a different room, and i kept hearing the amp through my headphones and it was causing timing problems and disorientation, so what i did is turn up the headphones louder, put in ear plugs, and then turned up the headphone amp. this drowned out the guitar amp in the room and i could only hear it in the phones. i hope it didn't cause combing or phasing...if you click the soundcloud above, that's the level it's picking up the click. can you hear that? it seems low to me -- would that cause phasing or comb?
2" isn't going to make much or any difference in that context but, dude...Why not just mute the guitar tracks?
I also doubt that sort of bleed is going to cause noticeable or serious filtering or phase issues. Your setup would need to be so ridiculously out of whack for that to happen.
I mean...take the headphones off and set them on the table. If you can hear them over the actual amp then it would certainly cause problems, but that ratio should be miles away from this ever happening.
Realistically, if you listed one side of the cans off year ear an inch, the guitar amp in the room should totally dominate what you're hearing.
Get the cans on turn them down, lose the earplugs, mute the guitar track in the cans (or turn the track down to a suitable level).
If latency is the reason, manage it with your buffer settings or totally mute the tracks.
If you're struggling to follow, try lifting on side of the cans off so you can hear mix and live, or try using direct monitoring if your interface supports it.
If you do the former and the amp is too loud (which it should be) pop an earplug in the open-ear.
Get the amp off the floor, get the volume up so everyone in a 1mile radius is pissed off, watch the gain (what sounds right is too much) and then just record, listen, alter, record, listen, alter.