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Korg X-911

“Fully refurbished by professionals and better than the rest. This required 5 hours of highly skilled expert synth tech labor. This unit was cleaned inside and out. We replaced all electrolytic capacitors. We opened, cleaned and lubed all pots and switches and cleaned all jacks. The end result is an X911 that works perfectly and sounds great that’s justifiably priced higher than the typical junk on the market and that’s ready for its next happy home. ” Click here to visit listing on eBay

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Korg X-911

“The Korg X-911 is a vintage analog monosynth that can be controlled by a guitar or any other audio source through a 1/4” jack, no special pickup needed, or by a keyboard or sequencer via CV (Hz/V) and S-Trigger jacks on the back. Has a variety of preset sounds with their own unique filters and controls (Electric Bass, Tuba, Trumpet, Distortion Guitar, Violin and Flute) and a “Synthe” section with various waveforms and octaves to choose from and a juicy voltage controlled filter. Pick and choose from any of the sounds or stack them together to add a full and rich sound to your music.

Decent physical condition, with some flaws on the panel (see photos). Just serviced in April 2024. Work done included replacement of a few faulty IC chips, cleaning the pots and slide switches, and calibrating/tuning both the VCO and the guitar interface pitch generator. Slider cap is not original.” Click here to visit listing on eBay

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Korg X-911

“Very nice physical condition and just serviced in April 2024. Work done included repair of a minor functional issue, cleaning the pots and slide switches, and calibrating/tuning both the VCO and the guitar interface pitch generator.”
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Korg X-911

“Up for sale is a Korg X-911 analog guitar synthesizer that is perfect for musicians seeking a unique sound. This instrument is designed to produce incredible tones and is compatible with a wide range of musical genres. The synthesizer is easy to use and has a variety of features that make it a great choice for professional musicians or hobbyists. The device is in perfect working condition and is in great cosmetic condition as well. This synth is very underestimated. Originally a guitar synth it can be used as an all analog, unique signal process/effects unit. This accepts a normal ¼” jack input no special pickups required. Just plug a guitar, microphone or other instrument into the X-911 and play a note at a time. It supports both CV/Trigger inputs and outputs making it very useful. The front panel is divided into semi-preset traditional sounds called “Instruments” and more exotic sounds labeled “Synthe”. The instrument sounds are Electric Bass, Tuba, Trumpet, Dist. Guitar, Violin and flute. The Synthe sounds are graphical waveforms (Pulse, Ramp, Square). Every voicing has adjustable parameters (filter controls except Violin with has envelope control). The Synth sounds have envelope controls – Attack and Decay. It is real fun to play.”
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Korg X-911 Project Machine

“Cooper’s has a Korg X-911 guitar synthesizer up for auction. Overall this unit is in POOR SHAPE. There are scratches, scuffs, nicks, signs of rust, missing side panel, missing model/serial badge as well as other signs of wear. The unit does power on, however it has NOT been tested. Additionally, do note that there are two buttons missing (I can not get the buttons to do anything when pressed) and one of the sliding knob covers is missing. As I stated the unit does power on, however it has not been tested (please only purchase this unit for parts or repair no returns). If you have any questions please send us a message. Thanks. ”
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Korg X-911

“Power cable: Available but this isn’t AC adapter. You have to prepare some converter for 100VAC.
Instruction manual: Not available but you can download it from the manufacturer’s web site.
Outer box: Not available” Click here to visit listing on eBay

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Korg X-911

“WORKING CONDITION: Excellent – This synth is in excellent working condition

PHYSICAL CONDITION: Excellent – A few minor scuffs and abrasions can be found around the device. However, everything is structurally sound with each button and knob perfectly intact. Overall, the physical condition is excellent.

INVENTORY #50609

BRAND: Korg

MODEL: X-911

FUNCTION: Guitar Synthesizer

PRODUCT DESCRIPTION: This listing is for a Korg X-911 Analog Guitar Synthesizer. Note that the power cord on this has a European-style Type F Plug on it. An adapter to convert it to USA outlets can be found for around $10 anywhere online. It will not need power conversion to work in the USA, just an adapter to attach to the plug. ” Click here to visit listing on eBay

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Korg X-911

“Rare vintage korg x-911 Guitar Synth tested and working. Good condition.

Awesome vintage equipment.

My dad bought it in the 70s and it had been sitting in a drawer for probably 30 years.

I tested it and it seems to be working as it should ” Click here to visit listing on eBay

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Korg X-911 Project Machine

“Korg X-911 Pcb Spares Repair. Unknown if it is working. From this pcb the middle switch and cap are not present. Otherwise looks good. Use for parts or renovation. ” Click here to visit listing on eBay

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Korg X-911

“Korg X-911 guitar synthesizer everything works!

This is a 1980’s attempt at something we do much better today with a pedal, but it’s cool for it’s quirky interface and it has the heart of a MS-20 filter and voicing in it. Plus it is now controllable with the Arturia Keystep 37!

It takes an audio input and processes it to generate a pitch voltage and envelope… using it to trigger two separate voicing sections which share the same oscillator. One is called Instrument and the other Synthe… you basically add the presets up on each side and blend them with the Balance slider. Each one has an adjustable filter setting or attack/release with the mini knob. You even get portamento which you can footswitch along with a hold function and interval jump.

It is only OK as a guitar synthesizer (it does work, I used a compressor in front) but it ROCKS as a mono keyboard filter unit or for running drum machines through… vocals can work but are iffy… don’t expect vocoding. I used a Fender Rhodes which worked well, so a Rhodes patch should too. Note it also puts out this voltage and trigger, but it’s Korg standard. It is monophonic, so the ‘voices’ are really just filtering the same oscillator in different ways. It is only good for tracking along about two or three octaves at most through the audio input, but tracks well if CV in is used over several octaves.

It does have CV and trigger in and out but they’re a weird Korg Hz/V standard, not normal 5V linear. So this will work with a Kork MS20 as an expander, or Korg Sigma/Delta/Lambda or even the PS3xxx series if you have a super studio! But not anything else.

UNLESS…

If you have an Arturia Keystep 37 (not sure about any other Keystep controllers but I ran mine with a 37) you can use it as a controller and arpeggiate or sequence in addition to just playing from it, or even control the filter or LFO with a couple of cables! This is a blast and the killer app for this little gem. If you have the Keystep now this is a great add… if not and you get this at least try one with it.” Click here to visit listing on eBay

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Korg X-911

“Condition

Fully functional

Excellent condition with light cosmetic wear

Service carried out to sockets

Includes unit and original manual only”
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Korg X-911

“This is a Korg X-911 Guitar Synthesizer I bought from Soundgas.com last year.
As everything that you can get from that shop the device is in fantastic shape, its from 1979, so minor
signs of usage as to be expected from a vintage instrument but in 100% working order,
nothing scratches and sounds great! Includes the service warranty document shown in the picture.
Comes with a voltage transformer as its a Japanese version. ” Click here to visit listing on eBay

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Korg X-911 Project Machine

“Tested and works somewhat, but needs to be repaired for full functionality. I sequenced it with a Keystep, and while I could get clear sound out of it, and the filter, octave, volume and different synth sounds worked, some of the functions did not seem to respond correctly or at all (i.e. some of the synth sounds did not respond to the envelope/tone controls). Also, I did not test the guitar input functionality, and the slider is janky (but works). I would put it at about “70 percent working.”

Because of this, this unit is being sold AS-IS with the understanding that it will need to be repaired.

Strange and powerful unit. Can be used as a guitar pedal, but can also be sequenced/controlled with CV/gate. So, essentially a desktop synth, even though it was marketed as a guitar pedal. Please note that it uses KORG’s CV standard, which is different than the Eurorack standard.

The filter in this baby is rumored to be the same as the one in the MS-20. So, here’s your chance to get that sound at half the price!

This is the 117V US version, so you will not need a voltage converter for the power.” Click here to visit listing on eBay

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Korg X-911

“Vintage KORG X-911 Guitar Synthesizer purchased new in 1981 – one owner. Includes S-2 dual foot switch and user manual. All in good working order.” Click here to visit listing on eBay

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Korg X-911

“In excellent cosmetic condition with minor wear and signs of age around the edges and corners. ” Click here to visit listing on eBay

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Korg X-911 Project Machine

“For sale is a Korg X-911 Guitar Synthesizer.

This is sold for parts only/as-is. The portamento section does not work, when the knob is turned nothing happens to the sound. So it will need some sort of service/repair to get it fully functional. May need some additional calibration.

The other knobs and buttons affect the sound as they should. Output knob is a little scratchy when turned. Body has some scuffs and marks on it. From a smoke-free home. 120V AC Version. Picture is of actual item for sale. ” Click here to visit listing on eBay

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Korg X-911

“Korg X 911 guitar synthesizer. Works with a replacement cancel switch.” Click here to visit listing on eBay

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Korg X-911 with Korg MS-04

“Crazy vintage guitar synth coupled with the MS04 pedal allows you to make crazy squelchy acidy LFO analog sounds with your guitar.

Pedal takes 2 9 volt battery’s ” Click here to visit listing on eBay

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Korg X-911

“Korg X 911 And Kong Ms04 Pedal. Unique Analog Guitar Synth Like Ms20. Crazy vintage guitar synth coupled with the MS04 pedal allows you to make crazy squelchy acidy LFO analog sounds with your guitar.

Pedal takes 2 9 volt battery’s ” Click here to visit listing on eBay

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Korg X-911

“Korg X-911 Guitar Synthesizer Analog VCO VCF Distortion Wah. In very good condition for its age, Condition is “Seller refurbished”. There is some surface ware, no structural damage, a couple of small screws missing from the front and back panels, has been tried tested and is fully functional, I don’t have the time, to explore the full depth of its true potential, as I have to many family commitments, you will find quite a few videos on YouTube, demonstrating this nice piece of electronic retro, ” Click here to search for synths on eBay

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Korg X911

“Works 10 of 10
Overhauled before shipping for long life and to keep original sounds.
Change all electrolytic capacitors and voltage regulators, short life Operational Amplifiers and logis ICs with new ones.
Knobs, switches and jacks cleaning.” Click here to search for synths on eBay

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Korg X911 Project Machine

” UP FOR SALE VINTAGE KORG MODEL X911 GUITAR SYNTHESIZER ANOLOG MULTI EFFECT MOOG IN GOOD COSMETIC CONDITION UNIT NOT WORKING PROPERLY IT’S MAKING A WHOLE BUNCH OF WEIRD AND CRAZY SOUNDS ALL THE LIGHT AND KNOBS WORKING FINE SOLD AS – IS FOR THE PARTS OR FOR RESTORATION PLEASE NO RETURNS THANKS PLEASE SEE THE PICTUERS .” Click here to search for synths on eBay

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Korg X-911

” Very rare and in excellent shape and was studio kept. Original power cord. Unit is in perfect working order. Some light surface scratches from wear and tear. ” Click here to search for synths on eBay

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Korg X-911

“A guitar synthesizer released by Korg in the late 1970s.
The waveform and other tones can be selected with the button, and the envelope is attached, and the synthesizer parameters are firmly mounted.
Status There was no problem with both input and output. Various knobs are also responding.”
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Korg X-911


Brand : Korg
Condition : Used ( Tested )
This item Condition rank : ” B “
Condition note: There is no problem in operation.
The knob is painted.”
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Korg X-911

“I’m selling a fully tested and working used Korg X-911 Vintage Analog Guitar Synthesizer. It’s in great condition and has been played and tested recently. The pictures show how nice a condition it’s in.”
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Korg X911

“Vintage Korg X-911 analog guitar synth in great condition. It even comes with the manufacturers overlay to get you started in a good place sonically. It has been tested and is working properly… ” Click here to search for synths on eBay

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Korg X-911

“It is a so-called guitar synthesizer. Roland is generally famous for guitar and synthesizer, but KORG also announced a compact model with less malfunction. Not limited to guitar, any instrument can be used as a source as long as it is a musical instrument that produces sound with a single note. You can mix several kinds of presets, or you can control the harmonic overtones like an organ’s drawbar to obtain a sound that can not be obtained with an effector.
Hold and portamento are also possible, envelope is also attached properly It can be said that it is a real synthesizer.
Operation confirmed.” Click here to search for synths on eBay

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Korg X-911

“Up for sale is rare Korg X-911 vintage analog guitar synthesizer.

The unit appears to be working reasonably well, I noticed the TUBA sound seems to be only producing small noise somehow, but otherwise all other sounds working and sounding fine as well as all the knobs and switches working as they should. There may be a slight bad contacts on the BALANCE slider, which could probably also do with some servicing/adjustment. All the LED lights above each buttons lighting up correctly when pressed.

Cosmetically the unit is in very nice condition as you can see. There are some signs of wear and minor marks here and there, but nothing major. I’m including plenty of photos so you can see exactly how it looks.

Comes with the Original Plastic Overlay as shown.
Power cable included.”
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Korg X-911

“Item is in good working condition, no defects.”
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Korg X-911

“Item is in good working condition, no defects.” Click here to search for synths on eBay

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Korg X-911

“Appearance of the item:
Please check on the photos for detailed condition of the product.

Functional:

perfect working .

Includings:

Box”
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Korg X-911

“Olivia’s Vintage would like to present this 1980’s Korg X-911 analog Guitar Synthesizer. It’s triggered by any instrument using regular input and output jacks. It’s a very unique synthesizer and 100% working. It’s in great shape with only some minor cosmetic wear.” Click here to search for synths on eBay

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Korg X-911 Project Machine

“This is untested unit. It powers up and I got the input sound on the output, however no other testing was completed.” Click here to search for synths on eBay

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Korg X-911 Project Machine

“Partially working with faults!

Instrument side:
Elec Bass LED always on (doesn’t Cancel) No sound either from this preset.
Tuba never switches on, so no response from this one either.
the other 4 work as intended, including trim pots.

Synthe side:
LEDs will light & cancel, but none are sounding.

I have a feeling this will centre around the filter chip rather than the buttons. Similar to the common fault in the Korg Delta. The parts are still available.

The left hand side of the panel is fully working, input, portamento/ interval/ tune/ octave all 100% on the 4 working voices. Still great fun to be had with this alone! Glitchy, Prog-type fun & Octave effects a-plenty!

Synthe filter knob not working, again pretty sure this is related to the synthe side. Possibly these tones go through the filter chip & the instrument side is filtered by resistors etc, as you have no control over those.”
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