I owned a CJ17LS and used a AudioPrism power cord and NOS Amperex tubes both of which made a huge improvement. I then upgraded to a CJ16 Series 2. The NOS tubes and power cord made very little improvement to the sound. My local CJ dealer heard the same thing as we did this one Sunday at his store. My recommendation would be to send your 16LS to CJ for the upgrade rather than spend $'s on NOS tubes and a good power cord.
- Ken