$ be simply another tool to aquire playful gear/tools and trans <-heh) to engage trance in varied temporal locations...most players I know have their kit, but primary on site gear depends on nature and size of venue...main board $ 2x front of house + subs and stereo monitors are minimum, lights, visual atmospherics to taste and budget, though there are often many high level amateur/hobbyist vj's and site adornment/altar artists in the woodwork waiting for the call to show what they can do...heh...anything outside needs pretty much triple the power for the same level of sound quality, and perusing and pondering venues one needs to remember neighbours as sub bass in particular, but from low mid down is not directional and travels its own paths usually seeking out the nearest direct route to someone most likely to be annoyed in the general area, so factor that in...