Well, thought I would post back...problem solved on my Concertone ZX50. It is now in a box in my shed, resting. I replaced it with a Jensen that I ordered from Amazon.com. I had to make a slight modification on my Puma 25RS mounting area. I then tagged my wires and slowly changed them out. The Jensen has speaker selection A, B and A & B. My Concertone had A, B, and C for the outside speaker. I had to parallal my outside speaker with my A speaker for an 8 ohm output. Now, I when I select A, my speaker in the couch area and outside works..B is for the bedroom area. A & B select works all. I called the Jensen Tech Reps on it. Their connector for Concertone to Jensen would not have helped me one bit because of the speaker configuration.