Dude, I don’t thing this is a good idea unless you want a muffled sound as you will lose a lot of your high end harmonics which contain most of the “sparkle”. If you are happy with your sound or your mic can’t pick up these frequencies any way it may not be an issue however, here is my 2c:

Recording guitar with a mic is quite a difficult thing to do well, there are a lot of variables i.e. ambiance, mic position, type of mic, preamp color... before you even think of things like double tracking, EQ, compression, reverb etc etc.

You are probably managing to kill some of the ambiance of your recording space (ie the first reflection) with your blankets however you may get a nicer effect by putting the blanket on the reflective surface (i.e. wall) after the mic whilst still facing the amp (like a Gobo).

Alternatively you may have your amp turned up too loud for the mic (i.e. over loading the mic) in which case the blanket is reducing the SPL (sound pressure level (think volume)) allowing the mic to function with out overloading. A better fix for this is to move the mic back from the amp and adjusting your EQ (as bass frequencies alter with volume- a la Fletcher-Munson Curves) whilst allowing for more room ambiance i.e. with your blanket covering the wall facing the amp.

I hope you see why I normally suggest that people who are starting out recording guitars start by recording direct. It is a lot simpler to make a better recording shooting from an FX board or a POD (it is what a POD was designed for) into a DAW (Digital audio work station i.e. Computer) than it is trying to manage all that air and stuff. Im not saying it can be done really well and I know many people who swear by micking amps. However, they have been recording guitars for a living for 20 years! I started using a mic and gave up as soon as Mr Pod came along!

[Edited by Dr_simon on 08-23-2003 at 05:03 PM]