The MS20 is the 1978ish original. It looks, sounds, and feels much better than the remakes. This one also comes with beautiful custom wood sides. I will also include the original black plastic end pieces and a pile of original patch cables. This synth works great and I believe is the MKII with the 2nd filter. That's great because the MS10 uses the MKI filter so that means with this pair you get THREE different filters and they both have external inputs.

The MS10 is also from 1978ish and is pretty rare. This one is not as nice as the MS20 BUT makes an incredible addition to it. The keyboard on this one does not scale correctly. It must be something with the keyboard because when triggered by the MS20 or something like a Kenton Pro midi/cv converter it tunes and scales perfectly. Some of the patch jacks are a bit dirty but still work. One key looks like it was broke and glued back together. It's straight and a good glue job. You won't be using this keybed anyway unless you know how to adjust it.

I was running both of these through 2 midi/cv converters but I was just playing them without them and I found I could get a very cool, 3 note, duophonic playing from just the MS20 keyboard triggering both synths. There is a trick with patch cables that makes the MS20 duophonic plus you can run the cables also into the MS10 and then tune one oscillator differently so the 2 oscillators following the low key are playing 2 different notes and the 3rd osc follows the high key. Pretty awesome plus you get a total of 3 osc, 3 filters, 3 egs, 2 lfos, and tons of patch points to and from each other. Tons of possibilities with having both. Get them both for $2200 with the patch cables and extra end pieces. I decided I should keep my Kenton midi/cv converters for other stuff but you can get them used online anytime if you want to go that route. They make this rig a duophonic semi-modular midi synth plus the Kenton add a couple more lfos. Highly recommended.

BOTH SYNTHS ARE JAPANESE POWER! You can get a converter online for cheap. I'm going to keep mine because I have several other synths from Japan.