A tum-on tuning system which uses threaded tuning rims in place of lugs used by conventional drums, and a spherical acoustic chamber (2) to provide both acoustic and visual improvements over pπor art instruments The turn-on tuning system uses a drum head (6) which is secured to the drum when sandwiched between a threaded drum shell (4) and a threaded rim (9) The drum is tuned by rotating the πm (9) to increase pressure on the drumhead (6) A further feature of the invention is the spherical acoustic chamber (2) which replaces the drum shell The spherical acoustic chamber (2) provides an enhanced audio quality, and also provides a housing for electronic equipment which may be held in the spherical chamber In addition the spherical chamber (2) provides improvements in the acoustic quality of the drum, and numerous visual improvements in that it allows for lighting which may be programmed fir entertainment purposes.