Bluetooth Mod for any vintage box: I bought this blue tooth wireless adapter from Logitech for around $30 and a $5 cassette adapter. I cut the power cord, ran it through the 1/4 headphone jack and patched it into the power board to get 5 volts for the blue tooth adapter. Ran the cassette audio cord through the cassette door and plugged it into the audio jack of the blue tooth adapter. Now I can stream music from my Android phone (using A2DP--stereo headset blue tooth transmission) to my Magnavox 8443 Power Player Box! The Logitech adapter is attached to the side of the boombox in the picture.