About a year ago it occurred to me to research if somebody had built some sort of mechanism to handle recording vocals in very hostile spaces i.e. my home studio. I could viably DI everything else but vocals were a problem. At the time I found the SE Reflection Filter. Yesterday on the Reaper forum, I bumped into the Real Traps Portable Vocal Booth. Its for one much larger and just in that sense it seems more effective. Also because of its size it has more applications e.g. it is viable to use it to isolate a guitar amp. It goes for the same amount of cash which is just under $300.00. Check them out.