Yamaha MJC4

MIDI junction controller

Original price unknown

Cited on Sound On Sound in August 1988 as "a MIDI processor as well as patchbay, but with only two inputs and four outputs", no information could be found on the Internet about this item.

It could be most likely a MEP4 with a different branding, a low end version of the MJC8 or an error in the article.