Clearsonic plaexiglass isolation for smaller amp like a twin, AC30, Deluxe etc. No more whiney ass band members telling you that you are too loud. Can be used live or in studio. Can crank up the amp for tone and this cuts a bunch of dbs off. Has gobo foam back and top if you need. I also added more acoustic foam to the inside that can be reomoved if needed. This cuts out any delay or verb bounce back.