ATS Acoustics Studio Stacker is a portable gobo panel and portable bass trap all in one. It delivers exceptional sound control by absorbing stray sound and excessive bass frequencies, reduces sound spillage between instruments, and reduces sound distortions during studio recording, mixing, listening, and live performing. This gobo is portable and travels easily to all of your recording and performing gigs, for professional studio quality sound control and absorption. Also works well as an installation-free acoustic panel and bass trap in listening rooms, home theaters, music rooms, etc. The solid wooden frame is furniture quality multi-ply radiata pine, the mixed mineral wool core (6lb and 2.5lb layers) offers superior sound absorption, and the cover fabric is attractively textured 100% jute burlap fabric to fit in to any live or studio decor. Product ships fully assembled, except for the 4 included rubber feet for grip while stacking. This stacker features a Noise Reduction Coefficient (NRC) of 1.18 out of 1.0 for professional studio quality sound deadening. These gobos are the industry standard for amateur and professional musicians, vocal and speech recording studios, sound effects studios, podcasters, streamers, and influencers.