its short for "go between" iono why they called it thaT ANYWAYS...its like a seperater but it deflects and absorbs sound .....so can get a clean take but its not sound proof itsmore like deflectin sounds and send it into a different direction

this is a gobo

the black sideds is the ones that deflect sounds so its far more better than the one on the top^^^^unless your rich and can afford an iso booth....this is the better buy