HI there I am new to this forum so please bare with me. I purchased the bose acoustimass gs series for 80$ Canadian online in my area. My question is i have a receiver/amp that does not have a hdmi input either only optical out and analog. I want to setup it up to the bose sub and speakers via optical or rca cord to my receiver because I want to be able to control the bass and treble and sound effect because it's lacking at the moment . It has no bass knob on the back either and I can't seem to do it through the remote . The bose unit is the older model that does not have a optical out on the sensor, all it has is rca red and white cord. As of now the Bose is currently running straight into the rca input on the back of my tv with my apple TV plugged into the hdmi and the bass and sound needs to be tweaked. Please help. Thanks for listening.