What I think is, when the orig. radio was on the power ant. was of course up but when we installed the new CD player using the original Bose system wiring, the radio part work fine to some degree...you could fade but not balance. When you went to the CD the ant. went down and nothing came out. I think somehow the ant. and the Bose amp might have shared the same power line. When we re-wired everything straight to all the speakers, removing the amp completely, balance/fade works perfect, as it should, and the power ant. went down when the CD player was being used. I dont know if that I something new in the new Alpine decks (Hope so, that'd prevent having to install an ant. switch so the ant. didnt go up when using CD player).