So my 1chip arrived! It was a console without a power supply, and initially I was quite frustrated when realising that a very slight increase in the AC adapter socket made it incompatible with all my NES/SNES AC adapters
Careful! If you attach an original PAL region SNES PSU to a Japanese or American console you will fry it, since these PSUs output AC rather than DC.
RGB amp should give a better picture regardless of your 1-chips region etc, perhaps not as big as going from 3 chip to 1 chip though.