OXI Instruments OXI One Mk1

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Make Noise 0-Coast

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Sleepy Circuits Mezzz - Haptic Bluetooth MIDI controller

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Demo in the listing (previously posted here, additional posts here).

"Excellent condition. Updated early 2026

Works perfectly. Low use

Handheld class compliant BLE MIDI controller

Haptic Notch knobs provide physical feedback when dialing in parameters

Central RGB eye segment display ensures you're never lost

Side buttons for channel selection

3D accelerometer, Internal Momentum Unit sends gestural data

2000mAh Battery

USB-C Rechargeable

Special integration with other Sleepy vidOS devices and works as class compliant MIDI controller"

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Roland Boutique TB-03 Bass Line SN Z9G1058

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Roland Boutique Series JP-08 Sound Module SN ZOG6961

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Moog One 8 Voice Polyphonic Analog Synthesizer w/ Original Box

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"Moog One 8 Voice in excellent condition. Tested and confirmed to fully function. Includes original box, power supply and additional materials(see photos)"

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Korg M1 EX with Blue LCD upgrade & Thee Wave Music Gig Bag SN 006981

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"Korg M1 EX in excellent condition. Tested and confirmed to fully function, this unit has had it's screen replaced with a LCD w/ Blue LED backlight. The M1 EX added additional PCM waveforms to the M1, this keyboard has the stock M1Ex patches installed but we can flash the original M1 patches upon purchase if those are preferred."

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Yamaha QY700 Music Sequencer w/ Yamaha Branded Gig Bag

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"This very good condition QY700 is an excellent sequencer that can still get the job done. It's certainly different than an MPC or other arranger device, but it's got some built in sounds that still kick some serious butt."

You can find posts featuring the Yamaha QY700 here.

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Sequential Prophet VS With Controller Rackmount 8-Voice Polyphonic Synthesizer SN 0275

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"With its controller, and exceedingly rare cartridges, this Prophet VS is a very clean example of a pretty hard to come by synthesizer. It was recently given a clean bill of health by one of our in house techs, and it sounds excellent."

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Roland TR-909 Rhythm Composer SN 416573

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"This very good condition TR909 is the real deal. It's got hundreds of genres under it's belt, and it can't wait to be a staple in your signature sound. It's working well and it's sounding great."

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Modemachines Xoxbox

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"This Xoxbox is a TB-303 on steroids! This one was made from a kit, but it works great."

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Ciat-Lonbarde Tocante Studworth Bistab with Speaker Mod built by crucFX

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Roland CR-68 CompuRhythm with Tauntek MIDI Mod SN 822170

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Roland AIRA System-1

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"Fully tested, perfect working condition. PSU not included.

Keyboard contacts have been cleaned, although Key E needs extra force to play. Key E marked with blue tape as pictured."

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Roland SH-101 with Original Soft Case SN x07014

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"Fully tested, perfect working condition.

Recently serviced with the following replaced:

- 5x Sliders
- Pitch Bend Potentiometer
- Power switch"

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Studio Electronics Omega 8 (Expanded: Moog, SEM & CS80) SN 1047

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"Up for sale is an early example of an 8 voice Studio Electronics Omega 8 (SN 1047), in excellent condition - both technically and cosmetically.

I’ve expanded the filters pallete with 8x Yamaha CS80 filters."

Curious if the orange knobs are stock.

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Electronic Music Laboratories Electrocomp EML-101 SN 475

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"This is a very rare Electrocomp 101 (Serial # 475) in a very good condition. It has been fully serviced and has no issues whatsoever.

I'm the third owner of this unit. Some mods were done in the 1970's by John Phelan, one of the engineers @ EML which makes this unit totally unique. Here's the functionality of the added 3 switches:

The switch near the Glide Control, multiplies and lengthens the glide time as the pitch slides from note to note. The switch below the filter turns the BP (bandpass) filter setting, into band reject (meaning it provides highpass and lowpass filtering simultaneously).
The switch next to the mixer changes the character of the noise (from white to pink)
I took great care of the unit and used it only in my studio. I'm selling it because I'm simply not using it at all. This 101 comes with original manual and documentation."

Note SN 475 was listed back in 2014.

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Oberheim OB-8 61-Key 8-Voice Synthesizer SN C50516

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"This monstrous synth is in great shape and sounds fantastic. There are eight analog voices which can be panned individually for some really interesting stereo sounds. The keyboard can be split or doubled and there are two oscillators per voice. It is a very warm sounding synth great for massive chords, basses and leads. This model has MIDI in out and thru.

It is quite a beast, with all the great 80s vibe and that classic Oberheim sound. In fantastic working and cometic condition overall. Serial No. 050516

Service notes:

-Replaced firmware IC
-Replaced several failied CMOS logic chips
-Recapped bend assembly and processor pcbs
-Repaired D/A converters on voice boards
-Cleaned panel controls
-Fully calibrated
-Repaired autotune circuit
-Replaced missing hardware"

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Steiner-Connolly Synthacon SN 0010

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"Am extremely sad to sell my Steiner-Connolly Synthacon

This was handmade by Robbie Connolly (The Killers) and his team under the direction of his neighbor Nyle Steiner who built and designed the original Steiner-Parker Synthesizers in the 70's. Made with real through hole circuitry and manufactured by a small team in Provo, Utah these are as luxury of a synth as you can get.

I had the pleasure of working on their team which is where I earned this, but now must part ways with it to pay off some debt.

I am really not eager to part with this, so it's priced accordingly...

Everything works, no visible imperfections I am aware of. Been kept in my home studio.

This is serial number 10, and I am unsure as to whether they're making more of these or not..."

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Roland AIRA TR-6S Rhythm Performer

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