Korg Micro-Preset M500 / MP500
Low cost preset synth. Built 1977-79 as M500. There appears to be an older then the pictured version with a metal circle on the knobs.
And from 1980-82 as MP500 it was built with a 600mW powered speaker below the panel. And the panel being in a beige like colour.
The rather basic connections:
- high out - for connecting the audio out to a mixing board
- low out - for connecting the audio out to a guitar amp
- non detachable (grrr!) power cord.
Two times the well known Korg 35 filter "chip". Not sure which preset sues which of these two filters or both.