A combination of a grill door and sound-absorbing panels can allow acoustic cabinet to have a net-absorptive effect on a rehearsal room. One or more acoustic cabinets can be strategically positioned throughout a rehearsal room for optimal acoustic performance. In any setting where noise is generated, furniture can tend to increase and distort the noise by reflecting sound waves around the room. Solutions to this problem have been developed for various settings. A filing cabinet has sound absorptive properties. The filing cabinet has a door having metal front and rear panels with an intermediate layer of sound absorbing material in between. According to the specification, the door absorbs sound generated in the workplace, such as employee conversations, telephones, typewriters and other office equipment to create a more pleasant work environment. A furniture system is provided with sound-absorbent fabric layers and can also be used to improve the acoustics of an office. While these disclosures may be effective in reducing the noise generated in an office, they are not designed to enhance the acoustical performance of rehearsal rooms used for music rehearsal or performance. The present invention is directed to an acoustic cabinet for the storage of musical instruments. The acoustic cabinet can have a storage portion having a plurality of individual storage units contained therein. A grill door can cover the open end of acoustic cabinet. The size, shape, and arrangement of grill bars of door can be configured to reduce the effect of resonance. Rear panel of acoustic cabinet can include one or more sound-absorbing panels that absorb sound as it passes through acoustic cabinet. A protective backing can also be disposed between sound-absorbing panels and individual storage spaces to protect the panels from damage when instruments and other objects are inserted into the storage spaces. It is primarily noise control equipment.