mjbphotos
Moderator
What I hear is guitar body resonance down low - in the open E to open A frequency range. Not a good resonance, either (inexpensive guitar syndrome). I'm afraid you'll just need to keep experimenting with position of the mic to the guitar - I can't see any reason to be doing it on the floor, though. Use a boom mic stand, sit in a comfortable (non squeaky) chair. Adjust the mic a little less towards the sound hole than this last try. When you hear the guitar when you are playing in a room, you are not hearing the direct sound of the guitar, you are hearing the soundwaves bouncing off everything and back towards you - this is not what the mic hears, so of course it is going to sound different.