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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.”
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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 3604P

“vintage keyboard synthesizer: ARP 3604-P For ARP 2600.

In working order.” 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 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 3604 Keyboard for ARP 2600

“This is a refurbished 3604 keyboard with new key bushings and upgraded op-amp. Plays fast with mechanically silent keys. I used two of these keyboards with my Arp 2600 and no longer desire the double set-up. The case is not torn up, but the latches are missing from the top as indicated in pictures. Electronics function 100% and ships with the 6 Pin connecting cable. ”
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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 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 3604P Keyboard for ARP 2600 Synthesizer

“This is the single voice keyboard manufactured originally for v.1 and v.2 series Arp 2600 synthesizers. Unlike old keyboards which are found in attics or forgotten in a basement, this has been an active keyboard in a smoke free studio. The keyboard action has been cleaned and a brand new set of bushings installed last year so it has no clacking or stickie keys. It plays very smooth. All electronic controls function 100%. None of the Tolex covering is ripped, but on the top of the case there are some scratches. It is cosmetically clean but the top of the case is missing the latches and one of the latching hooks as shown in the pictures. I do not wish to do any latch upgrades to the case and would rather that be determined by the new owner. Ships with a 6 pin connecting cable original to the Arp 2600. It will be wrapped and shipped carefully. ”
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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 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 3604P

“This is for sale an Arp 3604-P keyboard controller and and a 2600 Arp service manual.

I was negotiating to buy a 2600 Synthesiser last year to use it with though the negotiating fell through after I bought this and am left with it, so am letting it go as I do not intend to look for a 2600 in the foreseeable future.

It was given service a month ago by a local repair tech who gave it a internal clean and check.

I have no way to test it’s intended functions without a 2600 unit and if your looking at using it as such it would be necessary for an appropriate tech to calibrate it with the Synthesiser, and check it as it’s a 70s machine. There is no cable for connecting the 3604-P to the 2600. As such the listing is parts not working.”
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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 3604P Keyboard

“ARP 2600 SYNTH SERVICED
Selling my ARP 2600 as i need money for a project. The synth was fully serviceds in 2017 by Kent Spong: work included fitting new contacts, springs and bushings to the keyboard, plus general maintenance inc replacing caps and some knobs/switches. I also asked Kent to fit an additional long reverb tank as well as the short and install a toggle switch to alternate between the two. The central position of the switch bypasses both – please see last pictures. The switch can be mounted in the case – but i wanted to keep the 2600 original. so I’ve left this as an option for the potential buyer.
Manual and all cables are included. Sadly I’m selling as I need to fund other projects. ” Click here to search for synths on eBay

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ARP 2600 with ARP 3604P Keyboard

“Original 1970s grey faced ARP2600

excellent condition – please study the photos – as new looking as you’re likely to find.not perfect of course (40 years old!) but very very good. No rust.

New keyboard bushes, recalibrated.
Comes with cables

All working (though there are a few odd features I have never figured out). A few crackly sliders (40 years old remember!)

Comes with 3604P keyboard, and both lids” Click here to search for synths on eBay

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ARP 2600 with ARP 3604P Keyboard

“I have an ARP 2600 & 3604-P keyboard owned and used By Jack Bruce of the band Cream.

I’m selling as my control room is rather small and I need the finance to put towards some other gear.

Both are in their original boxes and have ‘The Jack Bruce Band’ stenciled on the outside. I have had it refurbished so it is back in fully working order apart from one of the internal speakers isn’t working, I decided to leave it original instead of opening her up and replacing it. I have a certificate of authenticity from Jack’s family to prove it’s provenance. There is no handle on the case of the 2600. I have given the Tolex case a good scrub and it has cleaned up nicely.

Work Carried out by Synth Restore in Bedford by Adrian.

Oscillator1 and 2 were replaced.

Replaced some broken sliders and replaced some that were showing signs of age.

All sliders were cleaned and lubricated.

Replaced many of the slider tops, as almost half were missing.

Serviced the keyboard, and cleaned the key contacts.

Calibrated the oscillators, and filter.

Power supply had the power transistors replaced.” Click here to search for synths on eBay

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ARP 2600 with ARP 3604 Keyboard

“ARP 2600 SYNTH SERVICED
Selling my ARP 2600 as i need money for a project. The synth was fully serviceds in 2017 by Kent Spong: work included fitting new contacts, springs and bushings to the keyboard, plus general maintenance inc replacing caps and some knobs/switches. I also asked Kent to fit an additional long reverb tank as well as the short and install a toggle switch to alternate between the two. The central position of the switch bypasses both – please see last pictures. The switch can be mounted in the case – but i wanted to keep the 2600 original. so I’ve left this as an option for the potential buyer.
Manual and all cables are included. Sadly I’m selling as I need to fund other projects. ” Click here to search for synths on eBay

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ARP 2600 with ARP 3604P Project Machine

“It Is Important to Read this Description to the End. Shipping is available although this auction states “local pick up only”.

What comes with this auction;

One ARP 2600 P Synthesizer that does not work, needs repair or use for parts.

One set wires. These wires connect the keyboard to the synthesizer.

One ARP 3604 P Key Board. We have no idea if the keyboard is working etc.

SEE PHOTOS… Look carefully to note condition, some knobs missing and/or broken from synthesizer.

Important; This is sold as-is, not working, for parts or repair.
The fuse is not in place on the synthesizer, DO NOT think you can put a fuse in and it will work – It will not.
We included two photos of the interior of the ARP 2600 P

SHIPPING: Winner of this auction will choose shipping method. There will be two packages or cartons.
First Package will weigh about 38 Lbs and measure 36″ x 24″ x 12″
Second Package will weigh about 25 Lbs and measure 38″ x 12″ x 8″” Click here to search for synths on eBay

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ARP 2600 with ARP 3604 Keyboard

” ORIGINAL ARP 2600 SYNTHESIZER WITH 3604 KEYBOARD

Been in climate controlled storage for decades.
The cases are beat up but the insides are in really good condition.
Little dust and what-not..one broken screw (see pic)
Powers up, makes sounds, keyboard connects.
All faders and pots freely move.
That said: needs repair and restoration.

What you see is what you get:

2 x cases containing

1 x ARP 2600 SYNTHESIZER

1 x 3604 KEYBOARD

1 x Vintage ARP Power Cable
1 x Vintage ARP Keyboard Cable”

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