To utilize the bedroom speakers along with the surround sound speakers you need to purchase a 7.1 surround system. When I was researching to replace my system I found a few listings for a 7.1 systems but the ones in the price range I wanted to stay within were sold out and since we were hitting the road I didn't want to wait until they restocked. I even found at least one system that the 2 satellite speakers could be toggled on and off just as the original equipment did.
I just did a quick google search for 7.1 surround sound system and several came up.
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