I have HK 7.1 receiver. I use the rear channels to run the multi room function so I can have sound on my patio. The wires run from the unit to a simple dial rheostat by the door leading to the patio. The wires to the speaker also run to the rheostat, so this is my volume control. What I am looking for is a new volume control. The rheostat works fine, but I would like something a little more up to date, withour breaking the bank. Something digital and modern. I did use google, but have not seen anything that I "think" would work for under 100 dollars.