I have my own recording studio that I do my projects and occasionally other projects from other artists in there. My studio is in my home and basically is a stand-alone control room with all the recording gear and I use the rest of the house for the recording rooms.
When I first started tracking in my house, I would use the den of the house for both tracking drums and loud guitars and got pretty good results. As my tastes changed I experimented and decided that my front living room got the best results for tracking live drums. Its just a great sounding room that was easy to control for drums by just moving the mics around. But for my guitars I was still looking for more control over the sound.
Since I do occasionally still do sessions in commercial studios, I noticed that they tailored their rooms with gobos and other things to get the sounds they were looking for. They obviously know what’s up so I decided to take that principle and take the DIY route.
I quickly realized that using the bigger room was not the way to go for the most part to be able to control recording my loud guitar sounds using 4×12 cabs. What I decided to do was use the guest bathroom on the other end of the house. This worked for a couple of reasons. First, it was isolated and even though the cabinet was at a serious volume level it wasn’t killing anyone being on the other end of the house.
Second, I have all the amp heads in the control room where I can dial in tones easily while monitoring the guitar both through the studio monitors and the cans. The best part was that in the guest bathroom I was able to put the cabinet on an Auralex iso stand and tailor the room around the mic’d up cabinet.
What I have found works best over the years is putting the cabinet on the stand and using another two iso stands in front of the cabinet in a V around the mic that is on a boom stand. The important part is to get the mic into position first to make sure you have it sounding the way you want it, then put the two iso stands on their sides facing the cab in V around the mic , then I put a towel or blanket over the top. The beauty is that by moving around all the different elements you can dramatically change the guitar sound to your taste.
This is just an example and there are countless variations and of course if you have a fully built-out studio then there’s a whole other set of options. For the DIY guy like myself this is a good starting point. Now go out and experiment on your own. The only limit is your imagination.