“Kawai K3m 6-voice rack synth module for sale, in Excellent condition.
Sale includes RC2 cartridge, a ~$75 value.
It’s a US Version (110V), only for sale to customers in N. American and Japan. The rackmount format gives you all the power of a classic 6-voice hybrid synth in a nice compact package.
This particular K3m unit is in VG to EX shape. All buttons and LCD characters are fully functional as well.
The SSM2044 analog filter (same as in PolySix) is makes this synth shine. Many describe the filters quality as smooth, round, kinda softer than CEM filters.
It includes an as-is storage cartridge. It does not appear to be working but perhaps its a bad EPROM. (A RC2 cartridge doubles the on-board patch memory to 100 patches you can call up instantly).
The unit also has a nice variety of LFOs as well, and even a primitive additive patch.” Click here to search for synths on eBay
“This auction is for a Kawai Digital Synthesizer 61-Key Keyboard K 1 II. This keyboard is used but still in good working condition. Comes with the carrying case. And a power cord.” 
“Kawai K1m K-1m Desktop Digital Synthesizer Module Tested Working Used. Condition is Used. Includes power adapter.I don’t have the manual.” 
“Excellent sounding Kawai K1 with many 3rd party sounds. There are extra banks of sounds on the internet.
“Rare KAWAI K5000W Advanced Additive Synthesizer with latest ver. 4.03. It’s in good used condition, loaded with awesome sounds I’ve collected from many sources. Has slight yellowing of the keys (common with these at this age) , some light scratches and a tiny knick on the bottom right rear corner as seen in pics. I have two of these and decided to sell one. Comes with power cord.”
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“Underrated 80s classic. 6 voice polysynth with 2 digital oscillators that let’s you choose from any of 32 waveforms from traditional analog waveforms to complex waveforms for killer bells and choir timbres. Then route them throguh analog filters for that classic warm tone. Not in the greatest condition, but built sturdy and sounds great.”
“1983 Kawai SX-210
“Condition: Overall a 7/10, has been gigged with several times. Never abused or in smoke environment, only in my personal studio and storage. Tested to ensure all is working as expected. This unit came with a ROM expansion between presets 700-999. Hundreds of great sounds. I will include my 88-key SKB case with this keyboard for safe travels and storage. It is out of alignment, but it will store and transport this keyboard successfully. You close the locks by standing the case up with the keyboard inside, which aligns the locks.” 
“Less that 950 of these were made, and even less exist today!
“I acquired this synth many years ago and it has served me well in my studio.
“Tested and working good!
“Kawai K1r Digital Multi Dimensional Synthesizer module model k1r Not Tested. Condition is Used. Buy for parts or fixing it could work just but i ha e not tested shows some wear the chip thing is bent alittle” 
“Fully functional Kawai modular synthesizer. DC jack replaced, and solder joints on 1/4″ & MIDI jacks reflowed. Works perfectly. Original A/C adapter included.” 
“Kawai K-1 61-Key Digital Synthesizer Keyboard. This one comes with a after market power supply only. It does work. Every single key was tested. See video link below. The high bidder will own this synth” 
“Kawai K3m rack unit; for parts or repair, unit functions. Likely needs new voice chips.
“Excellent condition, well cared for
“In great condition. Home use only in a non-smoking studio environment. Supplied in its original box.” 
“This listing is for a very nice Kawai K4 classic digital synthesizer. Sounds are great as you’d expect. All functions tested work as they should, every key tested – good practice for my chromatic technique!
“Excellent condition, well cared for
“This Kawai K3m is in great condition (only has a small bend at left rack ear, but hardly noticeable when put in a rack) and functions as it should. Comes with RC-2 memory card.” 
“Demystify complex additive synthesis with a plethora of real-time controls. I don’t have any floppy discs, so unable to text the disc drive, but the synthesizer sounds fantastic!” 
“Kawai K1m k1 M Digital Synthesizer Module Great Condition ((Working)) (((Rare))). Condition is Used. Please see pics for condition. Comes with This listing is for a KAWAI K1m Synthesizer Module.” 
“This is the increasingly rare K5M synth module from back in the day. Makes complex, amazing sounds. I have had this beauty in my studio for ages, but it is time to let it go. Turns on. Functions. Has some scuffs on the front panel and side panels (pictured). Cap for the volume slider is missing. Great synth. They do make rack ears for these if you are lucky enough, you might find them!” 
“This an 8 Voices/2DCO+ 1Sub OSC with a VCF section controlled by a VCF envelope, VCA section control by a VCA envelope.
“Kawai K3M vintage 6 voice Polyphonic Analog / Digital hybrid MIDI synth rack.
“Underrated 80s classic. 6 voice polysynth with 2 digital oscillators that let’s you choose from any of 32 waveforms from traditional analog waveforms to complex waveforms for killer bells and choir timbres. Then route them throguh analog filters for that classic warm tone. Not in the greatest condition, but built sturdy and sounds great.”
“Kawai K3M Analog Digital Hybrid Vintage Synth – Very Rare – No reserve. Condition is Used. ”
“KAWAI K1m Digital Synthesizer Module, used, vg+ condition. Condition is Used, kept in smoke-free studio environments by myself and original owner who bought it new in the ’80s, I bought it ~7 years ago. Excellent working condition, screen is bright and looks new, joystick and buttons all working fine. Has a lovely unique ’80s synth voice! Power supply is NOT included, runs on any generic 12v power supply”
“Good working used Kawai SX-240 from my personal studio and collection.
“KAWAI K5000 W Advanced Additive Synthesizer. Condition is Used.
“For sale:
“Working perfectly KAWAI K3M wavetable synthesizer rack module!”
“Kawai K1 II Digital Synthesizer and Midi controller. Condition is Used.
“Used vintage k4. This is a really light weight rack, don’t let the appearance fool you. The rack has plenty of cool sounds on board waiting to be played, and theres more patches on the internet too (just make sure the memory protect is off before sending patches, I made that mistake once) Sounds great!”