I use a Bose compact or Spacestation v3 on my jobs and in the studio. One or the other may be on 10hrs a day sometimes, with shutting them off when not in use for more than an hour. My thought was to use the amp that goes with the setup I am using, still, I wonder if I am cutting into their lifespan, and use a smaller practice amp, such as my CM30's, since I know my settings on the others for the gig?