The 69 is getting more popular and more parts available. 1986 was not a good year to be selling them. That is why I waited until now to invest in a restoration, not that I want to sell mine. Clones are still a problem, but knowledge helps. The multiplex stereo is a booster with an am/fm stereo radio controlling it. A very powerful setup. It could power 2 (12) inch woofers or Jenson tri axial speakers. I like the 67, but bought the 69. NICK L72