I would like to know the easiest way to control the volume of outdoor speakers (1 pair) independently of the inside speakers. I currently have a volume control outside - however when turned to it's maximum volume it's only as loud as the master volume on the receiver - so currently I can turn it lower than the master - but not higher - there lies the problem! And I need to keep the inside speakers on the master volume to be able to adjust the volume via remote while watching TV etc. Please help. Thank you.