I presently have Bose accustimas system in my living room which consists of five double cubes and one subwoofer.These are connected to my (A Speaker) receiver. Also connected to the same receiver (B Speaker) are two pairs of outdoor speaker with each pair having their own volume control near the speakers. When I have a party and there are people both inside and outside-there's a problem. In order to have the outdoor speakers loud enough, the amp inside has to be turned up higher than normal. This ends up being too loud for the inside guests. Is there some kind of secondary controller that could lower the inside music without sacrificing the outdoor volume? I would like to play the same content from the same receiver. I'm trying not to buy another receiver, however if there is an inexpensive solution I'd love to hear it.