I have a breadbox Commodore 64 with a Commodore 1702 monitor.
My monitor has three RCA-style inputs on the back:
- Audio (White)
- Luma (Yellow)
- Chroma (Red)
I purchased a cable which claims to be an original Commodore 64 monitor cable, but I believe it must have been made for a later model of the monitor (or perhaps for a different Commodore computer altogether) because it has four leads: White, Black, Red, and Blue. It's possible that the white may have originally been yellow, because all of the colors are quite faded. The cable sheath is light grey (but may have originally been white).
Through trial and error, I've discovered the red lead carries the Luma signal and the blue lead carries the Chroma signal.
Are the black and white cables both audio? Can I use an RCA Y-splitter to merge them? Can I connect them directly into a standalone speaker set (with the standard white-red/left-right RCA-style female connectors)?