Well, that may just be something to try, don't know if it will sound any good (speaker cabinet surrounding mic inside of it without speaker in it of course and of course better installation on the inside of it.) ?? It does separate the mic from the total room though I suppose, perhaps too much though, hard to tell without messing around and fooling around with it.

You still might line it with an inch of fiberglass #703 (per that other thread) ...

SPACEALF AND PHILIP. Yes, the Intention is to completely line the inside of it with 703.

I actually rummaging around found an old wooden wine box of mine, perfect shape and size! The wood is about a half-inch thick, and it is made of pine. Can't weigh more than 5# which is nice! It also looks nice which is a bonus.

I'm running down to the hardware store to find a drill that will perfectly allow me to drill a hole to fit my straight mic stand. I have some ideas of how to hold it there using these things in the plumbing department.

I will take pix. Once I'm in mid-assembly. Won't be long now!

So you can see where I'm going with it.

I decided against the 703 because all I have is 2" stuff and it would have been WAYY crowded in there. So, I'm going to cover all inside surfaces with the foam and see what happens!! This design is also cool because I can adjust the height of the microphone inside the box and of course, the whole height of the microphone, etc. It is incredibly light.

I need to pick up some more foam so I'll post more pics when it's done, along with audio samples.

I used foam in mine (a clumsey rig with Ethan Winer's $300 'Portable Vocal Booth') ... on the upper and lower surface) and things got pretty anechoic, indeed.

Please let me know what tests work out best ... as you finalize this.

(Warning: personally, I'd not even consider shoving 2+ mics in there ... precise placement would be awkward ... comb-filtering will possibly manifest) ... your current scheme seems ideal, IMHO)

I'd be still concerned for mid level boxiness in here. It could be difficult to hear, but you MAY get some resonance from the box at certain frequencies. Would be interested to set a speaker up in front of it and hit it with a sine sweep and listen for anything weird going on. The size of this box means that if there IS some resonance, it'll be fairly high. Ran a quick room mode calc on it. Be wary of the 300-500Hz region. On the other hand, it may not be noticeable. Time will tell. Just something to be wary of and listen for.

I would personally move to actually make the unit more breathable. If it doesn't have enough insulation to hit the lower frequencies, boxing it up like that might contain new ones from your voice. Thus creating more problems. Conversely, you may block out the low/mid room frequencies as well and they may be more significant. In an ideal world, it's probably a matter of finding the right balance. I'd take a guess that those perforated holes in the commercially available units are there for that purpose.

I'll be interested to hear how it all goes.

Here's what I did to help with my reflections? Seems to work pretty well... (Don't laugh.)

Or this one for a more panaramic effect? But again, I find that it helps to reduce reflections.

Again, no laughing please.
 

HAHHHHHHHHHH HAHHHHHHHHHHHHHHHHHH HAHHHHHHHHHHHHHHHHH (sorry, that was too easy)