The Korg OpSix is a phenomenal synth. It's one of my favorites, and it's more than just an FM synth. You can ignore FM entirely and replace them with a 6 oscillator subtractive synthesizer. If you don't care about FM, you don't even have to use it.
You can still route the oscillators around and filter and use OSC FX to warp the sound even without any of the FM stuff.
And WITH the FM stuff? Crazy powerful.
The FX sound like a dream, and you get 3 of them per patch. You can hold like 500+ patches, and my OpSix comes loaded with some prepaid sounds in the CyberPunk area, and also some experimental dungeon synth and ambient/darksynth patch packs i've bought. The cyberpunk ones are by far the best, the sequences on those are fantastic. I'll make sure to leave those on the unit.
Let me know if you want me to leave my own patches. I like them and plan to sell them in a pack when I refine and select the best ones, so you can grab it for free and a bunch of "B side" patches I probably won't put in the pack :)
At any time you can reload the opsix with the factory sounds from Korg, and I do include the "best of" on there, out of the two official korg updates that also added patches.
I am the original owner. I bought it when it was brand new for 850, and modded it with a 150+ dollar custom kit that turned it into a tank of a desktop synth. Total metal enclosure, to go with the original metal faceplate.
This thing is a brick. You could beat a zombie to death with it and still play a live show afterwards on the rooftop of an abandoned mall.
I am literally just buying a bigger opsix to replace this. My extreme financial loss is your moderate gain, based on current MSRP for opsix and the tall dog kit :)
Oh! And it comes with the original box, AND the original body/keys. I kept all of that. If you want to return it to it's original non-desktop state, you have that option.
First picture: On my synth stand hooked up to the minifreak for some wild bitimbrality.
Second picture: how it looked (bad camera) before the transition, and how it can look if you want to return it to it's keyboard-having state.
Note: This does not include rack ears. This a desktop module. Highly recommend angled stand for desktop work, or plopping it on your synth stand connected with midi to a keyboard underneath it.