Are you rehearsing for a big gig in the basement at your parents? Are they getting a little annoyed with the continual racket? If so, the JamHub Greenroom is your perfect solution. The idea is that each member of the band plugs their instrument into the hub.
The musician is then given a set of headphone so they can hear themselves and their fellow musicians playing, however anybody nearby, will have complete silence!
Any drawbacks? The system does not work for acoustic drummers and singers.