Jake, my attic studio might be smaller than yours but it probably has some of the same shape freatures. I asked Auralex for some advice and roughly followed it with decent results. As you can see it is a mix of bass traps and foam panels. Doug is right where (in another recent thread) he points at the absorbtion capacity of the panels which only deal with the high frequencies. And of course you need sufficiently thick and quality panels. There is nothing wrong with them as suggested by some here. For purely recording acoustic guitar I would love to have a bigger room and could do with less treatment (to get some 'air') but all my recording equipment is in my attic studio and impossible to move around. The air (where necessary) has to be created digitally. Karel