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ARP 2600 with ARP 3620

“OK, here it is – an original ’70’s classic analogue synth…the much revered

ARP 2600.

This unit, to be more precise, is a 2601 which puts it in the mid ’70’s in terms of version. How cool??? AND comes with the 3620 duo-phonic keyboard with lfo and latch functionality.

If you don’t know about this machine already – please look it up, there loads out there about this classic machine…i mean….3 ocs’s!!?!?!?!?!??! It really is a fun machine to either ‘learn’ how synthesis works, OR, just muck around and become R2D2!

Does this sound better than the re-models? Well, im bound to say yes, but really, yes!

Vintage – case is in amazing condition…in fact it all is, barely a mark on any of it. AND recently serviced in the UK by a synth genius who knows his poop he said ‘wow, this one is in great condition’.” Click here to visit listing on eBay

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ARP 2600

“ARP 2600 with 3620 Keyboard. Clean and in as close to mint condition as one could get. Includes covers. The AC inlet was modified to accept standard 3 prong removable cable. Repaired VCO2 and VCO2 Sub Board. Clean sliders, connectors and switches. Solder broken wire at reverb input tank which had fallen off. Calibrate and tune. Burn-in and functional test. Stays in tune. Ships to the lower 48 states only.” Click here to visit listing on eBay

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ARP 2600 with ARP 3604 Keyboard

“This unit was meticulously refurbished and future-proofed and is therefore better than the vast majority of 2600s now since we go above and beyond other sellers to ensure our ARPs are not only working perfectly but that they will hopefully outlast all others too. This process required 40 hours of skilled vintage synth tech and was done to the highest standards. In addition to any necessary repairs, work performed included: keyboard rebuild, power supply rebuild, speaker reconing, replacement of all tantalum capacitors, cleaning inside and out, cleaning of key contacts, slide pots, switches, replacement of molex terminal connectors and recalibration, etc. This unit is now in perfect working order and is sure to make its next owner very happy.

2600 synthesizer sn26127x
3604 keyboard sn36127x” Click here to visit listing on eBay

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ARP 2600 with ARP 3604-P Keyboard

“Up for sale, a circa 1975 ARP 2600 model 2601 V1.0 in exceptional condition and in perfect working order, complete with a 3604-P monophonic keyboard controller. Widely considered one of the greatest, most influential and most important analog synthesizers of all time, the ARP 2600 has been played by a vast array of artists including Joy Division, Stevie Wonder, Chemical Brothers, and Nine Inch Nails, to name just a few, and has also enjoyed a storied history in Hollywood sound effects creation, including at Skywalker Sound to create the original vocalizations for R2-D2. This particular iteration, the 2601 V1.0, was produced from 1975-76, identified by the small trim pot holes and improved jacks.

Freshly serviced by Synapse Audio Systems, this 2600 benefits from a rebuilt ringmod board, recapped as necessary and fully calibrated. The bus bars and j-wires have all been cleaned, and the keybed on the controller has been fully cleaned with all new bushings. The sliders are all original and a few have been rebuilt. All sliders benefit from a chemical cleaning, yet a small amount of noise over time is normal, given the originality of the componentry.

Designed as a more compact, intuitive rival to Moogs modular systems, the ARP 2600 is a paragon of analog subtractive synthesis, featuring a totally analog signal path with three oscillators, one 24 dB/oct filter, one ADSR envelope, one VCA, and one Mixer section. Additional features include an envelope follower, ring modulator, noise generator, LFO with sample and hold, built-in spring reverb, and a pre-amplifier with onboard stereo speaker. Originally marketed to high schools and universities upon its original release, the control layout of the ARP 2600 was designed with one fixed, consistent design (as opposed to the custom-built modular systems of the era) that was more immediately understandable while still rewarding users with plenty to unpack and expand upon. While the semi-modular system has a fixed selection of pre-wired modules, most connections can be re-wired at the bevy of patch points. As such, there’s plenty of nitty-gritty tweaking to be had, with loads of sliders and switches to satisfy any sonic sculptor.

The 3604-P monophonic keyboard controller was actually introduced alongside the previous generation of ARP 2600 (the 2600P), and was acquired independently of thia 2601, which was sold with the duophonic 3620 keyboard that had been introduced the year prior. The 49-key keyboard features Variable and Fixed Tone Interval controls, with a two-way switch to toggle between the two, as well as Tuning and Portamento knobs (each with a two-way on/off mini-toggle). All of the keys are responde venly, and all three original knobs are present.

Cosmetic wear on the ARP 2600 itself is very limited, with just a few tiny scuffs on the exterior of the “suitcase”-style case, which has been fitted with a new handle. The keyboard controller shows some light hardware patina and wear on the enclosure edges.

The original 8-pin controller-to-synth DIN cable and power cord are included.”
Click here to visit listing on eBay

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ARP 2600 with ARP 3620 Keyboard

“Retro Gear Shop is a high-end boutique store located in Nashville, Tennessee.

Arp 2600 + Keyboard 3620
For sale is a very rare vintage Arp 2601 Black/Orange analog modular synthesizer with 3620 duophonic keyboard. This one is in excellent shape and fully functional. Front panel graphics and tolex are in very clean condition. Classic semi-modular synth that’s a must have for any sound designer’s studio.” Click here to visit listing on eBay

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ARP 2600 with ARP 3620 Keyboard

“For sale is an original, unrestored 1975-1976 ARP 2601P v1.0, with accompanying Model 3620 keyboard. This was the last revision to include the coveted Model 4012 filter that was removed from later models after the lawsuit with Moog.

Additionally, the listing includes an original cardboard diagram, which was used to draw patch diagrams with dry erase marker in a classroom setting. Four patch cables are also included.”
Click here to visit listing on eBay

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ARP 2600

” EXCELLENT CONDITION ARP TONUS 2600

ORIGINAL AND BEST 1970’S UNIT WHICH CREATES AN INCREDIBLY HUGE SOUND WITH SO MUCH CHARACTER

PLEASE SEE IMAGES FOR DETAIL

UNIT DOES HAVE A COUPLE OF MINOR ISSUES AS FOLLOWS…

PWM ON VCO3 IS NON FUNCTIONING
THE LEFT HAND SPEAKER HAS NO OUTPUT
THREE SLIDER CAPS HAVE BROKEN OFF BUT STILL FUNCTION AS NORMAL
NO CASE COVER

THE UNIT HAS A COUPLE OF MODS WITH A 1/4 INCH JACK NOW ADDED FOR THE PRE AMP INPUT, ALSO ADDED ARE CV, GATE, TRIG, AND FILTER INPUT JACKS. THE UNIT ALSO HAS A STANDARD IEC POWER SOCKET INSTALLED

UNIT IS SOLD AS IS, PLEASE SEE IMAGES FOR CONDITION” Click here to visit listing on eBay

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ARP 2600 with ARP 3604P Keyboard

“Original Vintage ARP 2600. This is an early Tonus logo 2600, which is prized for a better audio path than later ARP 2600s. Includes the matching 3604P keyboard controller, keyboard cable, power cord, and both lids. Both the synthesizer and keyboard controller have just been serviced by Synthchaser. Work done included:

Power supply recapped, new thermal pads on power supply transistors
Sliders cleaned
All tantalum capacitors replaced (except those in submodules)
Ring Modulator and Sample & Hold submodules replaced with new Synthchaser modules
Both connectors for the keyboard controller and 6 other internal connectors have been replaced for reliable operation
Nuts, washers, knobs and slider caps ultrasonically cleaned
Full calibration under oscilloscope

3604P Keyboard refurbished

New key bushings
Key contacts and bus bars cleaned
Keycaps ultrasonically cleaned
Bellcrank caps cleaned and relubricated
Tantalum capacitors in keyboard electronics recapped

The synthesizer is in good condition. There is a scratch on the panel below the pre-amplifier. The manual gate button contacts are dirty or worn and sometimes it does not trigger. Parts of the tolex case are shinier and it looks like something was on top of it that had been removed. This is most noticeable on the keyboard controller and the lid of the synthesizer, not really on parts you would notice when set up in your studio. See pictures for details.” Click here to visit listing on eBay

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ARP 2600 with ARP 3604P Keyboard

“For sale is a rare vintage Arp 2600 analog semi-modular synthesizer with Arp 3604-p keyboard. This one just got back from full servicing (with big service costs) and is 100% functional ready to go. It sounds amazing, nothing is quite like an original vintage Arp 2600.” Click here to visit listing on eBay

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ARP 2600 with ARP 3604-P Keyboard

“On offer is one original Vintage ARP Analog semi-modular 2600 rare early TONUS Logo series Electronic Music Synthesizer fully restored.
This is the Arp 2600 model 2601 synthesizer, which has long been one of the most highly prized and sought after of the old modular analog synths. It has an amazing combination of limitless flexibility, ease of use and incredibly sweet sound that is almost impossible to find in other synths of its time. However, if you’re looking at this auction you already know all this!

CONDITION:
All components are original except for 2 op amps. One for VCO-1 square wave out and the other for the Mixer amp. Additionally, the left speaker has been replaced. All have been tested and perform up to or better than original specifications.
The case of the synth has a few scratches on it and there is a small nick on the panel near the reverb sliders and on the keyboard panel upper right but overall with the restoration it looks really great. All knobs, slider caps and adjustment covers are present except one cover for the negative null which in no way affects operation. All the markings and legends are pristine.” Click here to visit listing on eBay

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ARP 2600 with ARP 3604-P Keyboard

“ARP 2600 + ARP 3604-P Keyboard Serviced
For sale is a rare vintage Arp 2600 semi-modular analog synthesizer with Arp 3604P keyboard. This is a classic amazing fun synth and nothing quite sounds like an original Arp 2600 synth. This one has been fully serviced by our tech, including:

– full recap of main unit and keyboard
– power supply rebuilt
– calibration / tuning
– going over all modules and sections to ensure proper operation
– cleaning all sliders / potentiometers
– aligning keys on keyboard
– cleaning all contacts on keyboard
– new bushings on all keys

Includes spare patch cables (not all patch cables were tested, they look to be vintage and some might be not perfectly functional), power cable, keyboard cable, original Arp logo patch, and manual. This unit is ready to go making music in your studio, don’t miss out! ” Click here to visit listing on eBay

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ARP 2600

“This unit was disassembled, cleaned inside and out, meticulously serviced, with some future-proofing measures and fully and repeatedly tested by vintage synth specialists with decades of experience (us). This process required 22 hours of skilled labor. The result is an ARP 2601 that is much better than the rest. Don’t settle for less / get what you pay for.

This unit is working perfect, is ready to play, and will hopefully outlast all others.

This unit came to us without a keyboard, which is no problem for most people because it’s better to control it with an external midi to CV converter. This way, it can be played by your MIDI DAW or whatever midi controller you use with it. If you need an original arp 2600 keyboard to go with it, we have a model 3604 that we can sell you – email us.

In addition to any repairs, we did the following work to this unit:

-Fully disassembled, cleaned inside and out.
-Power supply rebuilt: new capacitors and trimpots.
-All tantalum capacitors replaced (these are a common source of failure in ARPs).
-All sliders and switches cleaned and lubricated.
-Cleaned Cinch-Jones connectors.
-Recalibrated.
-Multiple systematic tests of all functions.” Click here to visit listing on eBay

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ARP 2600 with ARP 3620 Keyboard

“The mighty Arp 2600 is up for auction.

I have owned this incredible synthesizer for 24 years and it has never left my smoke free

climate controlled studio except for tuning and upgrades.

It was fully tuned and calibrated in March 2021.

This is an Arp 2600 in great condition.

Not only is the exterior and Tolex in great condition, the electronics are also in great condition,

and all features work. Every key on the keyboard plays without glitches or drifting.

Every slider, pot and jack work. All hardware on the cases and the Tolex covering are original.

A matching 3620 keyboard is also in great shape and plays perfectly.

The original lids for the 2600 and 3620 are included.” Click here to visit listing on eBay

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ARP 2600 with ARP 3604P Keyboard

“The original ARP 2600, made 1970s. Same owner since 1981. Carefully kept, professionally refurbished in the UK including replacement of keyboard bushings.” Click here to search for synths on eBay

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ARP 2600 with ARP 3604-P

“Retro Gear Shop is a high-end boutique store located in Nashville, Tennessee.

ARP 2600 + 3604-P Keyboard
For sale is a very rare vintage Tonus logo of the Arp 2600 semi-modular analog monophonic synthesizer, most likely a 2600P V2.0 based on internal components. This is one of the more desirable sounding Arp’s to get with the 4027 Oscillator and 4012 Filter than the later G-clef and orange/black models.

Very good condition, with some wear as expected for its age but overall still nice shape. Most of the wear is on the outside tolex, the front panel face and keyboard itself are in great shape. Includes both lids to unit and keyboard along with keyboard connecting cable. Comes with original manual. We’ve had many 2600s pass through our shop over the years and we found this particular unit to sound fantastic. It’s 100% fully functional, just back from full professional servicing. Don’t pass this rare chance up!

Servicing included
– VCO modules are 4027 (2nd generation between 4017 and 4027-1)
– Confirmed output of VCOs and general operation
– Full recap, replacing all tantalum caps with proper electrolytics
– Cleaning and restoration of all sliding potentiometers
– Adjustment necessary
– Cleaned boards
– Performed adjustment procedure
– Completed reassembly and tested for proper operation

3604-P
– Complete disassembly
– Replaced tantalum capacitors
– Replaced poly caps for greater stability
– Removed all keys
– Straightened keybed chassis and replaced all bushings
– Cleaned key contacts
– Lubricated and replaced all keys
– Cleaned all potentiometers and switches
– Adjusted and set CV output
– Performed final play tests

All repairs for the ARP 2600 and 3604P will be guaranteed for a full year.” Click here to search for synths on eBay

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ARP 2600 with ARP 3604-P Keyboard

“I purchased this 23 years ago as an investment.When I received it was fully functional and I was able to nail a bass patch that sounded every bit as powerful as any Moog I’ve ever heard.After a year it stopped functioning and I Opened it up and noticed the filter was potted with epoxy to safeguard anyone copying the circuit but also prevents service.I packed it back up and it has been in storage until now.I was considering sending it to discrete synthesizers (CMS) for service but there are quite a few options that would improve upon the existing instrument but I should leave that up to the end user how it should be hot-rodded.This synthesizer will always be worth more than the current Korg or Behringer knock offs because this ARP is 48 years old and is a collector item.I am selling this synth as is, untested but it does turn on and I was able to get a droning sound pitch tracked using the keyboard.” Click here to search for synths on eBay

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ARP 2600 with ARP 3620 Keyboard

“Beautiful Arp 2600 that has been in storage for a long, long time. It is intact-all slider caps are in place as you can see as well as all jacks and switches. There were some professional modifications done by the previous owner (switches/jacks at ADSR and switches on 3620 kybd, and a pot above the kybd CV in the filter section- see pics). I never took the time to determine what the mods did, but you can surmise. I turned it on about 2 months ago, and all three oscillators were working, however after literally sitting for years (it has been more than a decade), it’s going to need a thorough going over by a specialist. If I were the buyer, that would be the first on the list- have it completely gone through, cleaned and brought to spec. If you’re gonna invest in one of these, this one is worthy of your consideration mainly because it’s a very clean unit (no signs of any physical or psychological abuse)! ” Click here to search for synths on eBay

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ARP 2600 with ARP 3620 Keyboard

“ALL GEAR IS TESTED AND GUARANTEED TO BE 100%

ANY NOTABLE COSMETIC OR FUNCTIONAL ISSUES WILL BE NOTED BELOW IN RED.

THE PHOTOS THAT ARE SHOWN ABOVE ARE OF THE ACTUAL ITEM YOU WILL RECEIVE.

Seven non-original slider caps (in filter section)
Scratches/scuffs on panel near Ring Modulator input 1 slider
Four non-original chassis screws
Tolex peeling near top of unit
Some corroded metal hardware on case exterior (latches, corner guards, etc.)—see photos
Some corrosion on 3620 Tinijax & 1/4′ washers—see photos

2600 Features

2601 with 3620 keyboard
2601 S/N: 26010605
3620 S/N: 36200605” Click here to search for synths on eBay

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ARP 2600 with ARP 3604 Keyboard

“Untested and being sold as is for parts or repair.

-2600 serial no. 261347

-3604 serial no. 36724

-both original hard top cases included

-slight tobacco smell (only noticeable upon close inspection)

-original manual and some cables (pictured) included ”

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ARP 2600 with ARP 3604 Keyboard

“Untested and being sold as is for parts or repair.

-2600 serial no. 261347

-3604 serial no. 36724
-both original hard top cases included
-original manual and some cables (pictured) included ” Click here to search for synths on eBay

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ARP 2600

“This is a rare ARP 2601 V3.0 2601-0721 vintage synthesizer with orange lettering. This synthesizer was originally used at a local college and was very well taken care of. It received a face lift by Phil Cirocco which included a rebuild power supply, repaired the 4072 filter, replace w/ blk Odyssey type 1, replace washers and cleaned nuts, front panel restoration, cleaned and lube sliders, cleaned circuit boards and inside chassis, received a full calibration, and comes with 2 original power cords.

The unit does have some rust on the case corners which you can see in the pictures. It also has a mark on the case but the synthesizer itself is in nice condition, especially after the work which was done on it. Again, the unit was maintained very well and kept inside at the college. It is fully functional and tested by Phil Cirocco after all of the work was completed.” Click here to search for synths on eBay

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ARP 2600 Project Machine

“For yourconsideration is an ARP 2600P (Version 4.0) analog Synthesizer (nokeyboard) for restoration. Judging by the writing on the inside ofthe cabinet near the spring reverb unit are the markings 4P. I haveevery reason to believe that this is the original cabinet which datesthe manufacturing year to be 1974. During this time ARP was using the4012 Low Pass Ladder Filter which was essentially a copy of the Moogdesign. This led to a patent dispute forcing ARP to change their LPFdesign for use in later models. Back in the early 1980’s I designedand built my own analog synths and had an absolute blast using them.Then interests shifted and I moved on to other hobbies. Several yearsago I got the “bug” to get back into analog synths and I acquiredthis 2600 with the intention of restoring it to it’s full beautyafter I retired. During that time I found Synthesizers.com and builta beautiful modular synth I know now I’ll never part with. I’ve beenretired almost 2 ½ years and now that I have my “dream”modular synth I have no motivation to restore the 2600. I would loveto see this instrument go to someone who will bring this classic backto it’s full potential. I never powered up the synthesizer since Ihad it so I don’t know it’s current electrical condition. With thatbeing said the synth should be restored by someone who is experiencedin this type of vintage equipment. The wood cabinet is in good shapebut the tolex covering will need patching or replaced. The frontpanel is also in great shape however please look very closely at thephotos. There are some sliders missing the caps and also some of the stems are broken off flush with the panel. The slider controls willhave to cleaned and possibly replaced. All of the circuit boards,wiring harnesses and the spring reverb assembly are intact. There’sno carrying handle and I have some of the hardware removed to takephotos of the inside of the cabinet which will go back in place. ”
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ARP 2600 with ARP 3604 Keyboard

“Born in 1973, this ARP 2600 set is 46 years young. It has the coveted Moog type (4012) ladder filter.

Complete professional future proofing performed in the fall of 2019. This 2600 received 68 hours of meticulous care by our technician that has over 30 years or ARP / Oberheim / Moog experience.

We have plenty of references on both sides of the Atlantic with several recent $10.000+ machines sold. Buy with confidence.

Comes with collectable original user manual with the original patch book.

This 1973 ARP 2600 / ARP 3604-P keyboard is now ready for another 40+ years of spectacular sound and music creation.

It is in stunning operational condition and sounds spectacular!

The ARP 2600 is a very early one (1973) that has the Tonus front panel (square holes for the speakers). All the main boards are the Tonus boards, complete with gold plated connectors and the bettering wiring.

This machine has the highly desired copper clad “Moog” filter (4012) and the larger 17″ reverb tank amongst other perks.

These really early 1970s 2600 benefits from a period when ARP/Tonus were still building them with the best components and that extra love.

Really unique to find a beast like this in this fantastic condition!

All submodules are original modules, no re-manufactured clone modules in this machine.

The ARP 2600 is one of the most legendary analog synths every made.

Everything from crazy sound effects, Earthquake style base lines, beautiful leads and potent kick drums, the 2600 can do it all.

Highlights future proofing:

* All new high-end capacitor power supply upgrade

* New powerful mains transformer to ensure (pitch) stability

* Multi turn high end trimmers on power supply

* All circuit board tantalum’s replaced (critical) with high end capacitors

* Full factory specification calibration (or better)

* New main unit Cinch Jones receptacle (for keyboard connector)

* NOS parts refurbished (keyboard) Cinch Jones connector

* New Reverb tank mounting bushings

* All new keyboards bushings

* New keyboards S/H and portamento caps

* Calibrate keyboard tracking”
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ARP 2600 with ARP 3620 Keyboard

“Arp 2600 semi-modular synthesizer with 3620 keyboard
Electronics have been recently maintained and are in full working order
Original Tolex with minor aging/wear, no major rips or tears. ”
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ARP 2600 with Roland MPU-101

“ARP 2600 v.2 with 3604P keyboard in GOOD condition, plus manuals and extras.
Here is a unique opportunity to own a rare, collectible analog synthesizer classic.
TONUS U.S.A.1971-72 (version 2) with the model 3604-P keyboard and cable – Cinch Jones connectors.

THE ROLAND MPU-101 MIDI – CV converter IS INCLUDED in mint condition with original manual.
** SORRY, LOCAL PICKUP ONLY **

LOCATION DISCLOSURE:
I live on the Cumberland Plateau in middle Tennessee between Nashville and Knoxville.

The included extras:
owner’s manual (quality photocopy and pdf ),
service manual (professionally bound photocopy and pdf)
ARP 2600 Patch Book (quality photocopy and pdf)
ARP 2600 Front Panel Facsimile (blank patch sheets)
custom-made 1/8″ mini phone patch cables (Switchcraft plug)
1/8″ to 1/4″ phone cables
several vintage grey cables with the molded plugs and 1/4″ phone adapters
spare AC line cords

ONE MODIFICATION:
* Switchcraft 1/4” phone jacks added to the front panel.
(one for the pre-amplifier input and two more for the left and right stereo outputs) Very convenient.
*** otherwise, 100% original inside and out ***

KNOWN PROBLEMS:
* No audio from the right speaker and line output.
* The 3604P keyboard contacts will need cleaning.
* One missing slider cap broke off long ago, but the slider pot is still good.
(See the photo of the right speaker volume slider pot)
Please note that this has nothing to do with the first “no audio” problem listed above.

*** other than that, ALL modules and controls function 100% ***
The synthesizer may be used in its current condition.
I am still using it as-is with the Roland MPU-101 MIDI to CV converter.”
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ARP 2600 with ARP 3604P Keyboard

“ARP 2600 Vintage Synthesizer and 3604P Keyboard (not pictured)
internal speakrs do not work. The case is scratched up a bit,but the synth is in nice shape.
the keyboard needs new bushings. I can put new bushings in, im ording them. We cn work out youre-buying them at cost, or have me instal them. Putttig in new bushings is easy. . Just take out the keyboard remove whatsleft of the old ones and slip on the new new rubbe bushings. Its the smallest of issues. It works. jut makes clank sound from the keys hitting he post.
i will try to putup a demo on youtube, but it all works.
Probably could use some calibration.”
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ARP 2600 with ARP 3604P Keyboard

“Refurbished 12 months ago including re-tolexed case.
Good working order has been used very little since the service.
Superb sounding and an increasingly rare and sought after instrument.
Excellent sounding reverb and ring modulator.
The unit has had: Several faders replaced, VCO sub module swapped out filter sub module was swapped out All sub modules to original factory spec.
Power supply was swapped to run from 120v to 240vAs ”
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ARP 2600 with 3620 Keyboard

“Recently (about a month ago) refurbished by one of the best techs in SoCal (Montoya). It was also previously professionally maintained when I lived up north, about 4 years ago (Siegenthaler). Many 2600s are electronically flaky, and most of any of the keyboards are internally a wreck — but not this pairing. They are electronically in excellent shape, and also are in fairly good shape cosmetically.”
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ARP 2600 with ARP 3604P Keyboard

” For sale is an Arp 2600 synthesizer along with a 3604P keyboard that is well used and working (mostly), it makes plenty of great noise but needs service to be back to it’s best condition. Known issues are as follows; both lids are missing, numerous broken sliders, oscillator 3 not working, some jacks are intermittent, audio/lf switch on oscillator 2 is intermittent. Power and keyboard cable are included, piece will be well packed for it’s journey to it’s new home or can be picked up near downtown Los Angeles. This synth is being sold as is with no returns.”
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ARP 2600 with ARP 3604-P

“Very good condition, with some wear as expected for its age but overall still nice shape. Most of the wear is on the outside tolex, the front panel face and keyboard itself are in great shape. Includes both lids to unit and keyboard along with keyboard connecting cable. Recently fully serviced by professional tech. We’ve had many 2600s pass through our shop over the years and we found this particular unit to sound fantastic. It’s 100% fully functional, except for 2 small issues worth mentioning: one slider shaft has a broken tip (in Voltage Processor section, probably the least used part of the synth and you still have 2 other working Voltage Processors), and the keyboard input jack to VCO3 is hardwired to receive voltage from the keyboard (jack will not bypass the keyboard input). Other than these two issues the unit is working as it should. At some point this was modified to accept standard 3-prong cable instead of the unusual oval shaped cable they original came with. ”
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ARP 2600 with ARP 3604-P

“Refurbished 12 months ago including retolexed case. Good working order has been used very little since the service. Superb sounding and increasingly rare instrument. Excellent sounding reverb and ring modulator. As used by Todd Terje, hot chip, etc etc etc etc ” Click here to search for synths on eBay

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ARP 2600 with ARP 3620 Keyboard Project Machine

“This vintage ARP is being sold for parts/repair. It does power on (you’ll need a Belkin 17952 power cable available for $20 on eBay) but is being sold as is untested and intended to be sold to someone who would like a great opportunity to buy one of these at a cheaper price for restoration or re-sale purposes. ARP itself is in nice condition shape just missing a few faders the keyboard is in rougher condition and may need more work than the ARP itself.” Click here to search for synths on eBay

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ARP 2600 with 3620 Keyboard

“Arp 2601 Synthesizer in overall fair-to-good used condition.

You are buying as-is. I have not gone over the entire synth and checked every feature and combination but it certainly works and makes that incredible 2600 sound. Known issues are a handful of broken faders and pitch tracking issues on Osc 2. ”
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ARP 2600 Project Machine

“This item is untested as we have no power cable that fits. The keyboard attachment is missing as well. This item is recommended for Parts & Repair ONLY. ” Click here to search for synths on eBay

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ARP 2600 with ARP 3620 Keyboard

” Classic vintage Arp 2600 analog semi-modular synthesizer with model 3620 keyboard in absolute museum quality condition. This synth was in climate controlled storage, and unused for over 25 years of its life. It has just had a complete refurbishing and had it’s op amps upgraded by RetroLinear, and is absolutely 100% guaranteed to be in perfect operational condition. As you can see from the pictures, this synth is in immaculate cosmetic condition, with only the most minor of rub marks on the case. It’s never been on tour, or used for any live performance. It even smells new! You won’t find a cleaner or more perfectly functioning 2600 anywhere.

This is a model 2601 v1.0. Serial number 143. This version originally had op amps that didn’t sound as good as earlier versions of the 2600, but they weren’t as prone to mechanical problems. These have been replaced with upgraded op amps that combine reliability with the superior sound of the first models of the 2600. A complete listing of the recently completed overhaul is detailed below.

Remove key bed. Clean chassis, remove key bushings and replace with new. Correct geometry. Pull buss bars and springs. Clean keys and install 18 new standoffs. All tantalum caps replaced. All trim pots and sliders replaced. All flux removed and all the boards cleaned. All front panel jacks replaced. New wires installed where needed – most wires from harness saved. Noise generator power mod installed on board 5-1. Reverb gain mod installed on board 4-2. VCF mixer ac coupled mod installed on board 3. Ceramic capacitors audio mod installed on board 4-2. New power supply and sense lines installed. Audio path upgrade mod – replace all OP amps throughout. Calibrated and ground modified for reduced noise. ”
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