DIY Iso Box

I am wondering what kind of sound something like this is going to create ???

From reading that sometime your studio need alot of bass traps when they are small ... that box is small all right !!!

If isolation from electric guitar and other instruments is a huge issue,like a live stage recording,these are great.Even if you are in a small studio,they could be usefull if you need to keep the noise down for the neighbors.They are not, however, the best way to record a guitar cabinet.If you are at home,why not just stick the cabinet in a closet, or another room?
Like you said, if small rooms need alot of bass trapping,then how many bass traps would this tiny room need to sound good,Ha Ha.

Exactly. It might block sound, but probably won't sound great.

--Ethan