The reason we use a hybrid acoustical enclosure for that application is to provide the needed sound reduction and access. The S-45 alum a frame enclosure is like the skeleton and provides a light weight but sturdy frame. It has a few S-45-MW panels permanantly fastened into locations that don't require access. Then it has our 2" thick BA ArtSeal absorptive swing doors where constant access is required. Then finallyas well it has flexible BA style acousti curtain or sound curtain / blankets on a sliding track where intermittent access is required.