Sequential Circuits Prophet 5 Rev 3.2

Restored to truly superb condition; sought-after Rev 3.2 with extended patch storage (originally a Rev 3.1 that has been converted). Full working order after an extensive, meticulous overhaul by one of the UK's best synth techs.

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Restored to truly superb condition; sought-after Rev 3.2 with extended patch storage (originally a Rev 3.1 that has been converted). Full working order after an extensive, meticulous overhaul by one of the UK’s best synth techs.

NOTE: The restoration of this synth is now complete and it’s ready to ship out


It is ready to ship now.

Prophet 5 Rev 3.1, upgraded to 3.2 spec and with patch storage upgrade to the same as a 3.3. For sale meticulously restored, tested and working perfectly.

Covered by our standard 3 month synth warranty.

Engineer’s report:

  • Serial number: 2249
  • Unit taken out of storage after a long period of time. Boots and tunes, but makes no sound of any
    kind, apart from A440 tuning signal. Power distribution strip on bottom of PCB 3 partially open
    circuit on -15V path. Replace missing connections with external hook-up wire.
  • Unit now partially works but in a very unstable manner. Electronics separated from chassis work
    and wooden element sent to woodwork shop for refurbishment.
  • Control panel boards removed from unit. Facia cleaned, tantalum capacitors replaced with
    aluminium types and all pots and switches cleaned. Previous attempts to repair track work tidied
  • Whilst instrument in dissembled state work on problems related to the instability. PSU striped of
    all capacitors both electrolytic and tantalum bead types. Replaced with modern aluminium types.
    Replace 2 x 6800uF computer grade capacitors. All three linear regulation devices replaced and
    thermally re-mounted with modern day equivalents. Devices attached to PSU board using fly leads,
    to avoid future lead disconnection whilst moving. Trimmer resistors for +/-15V rails replaced to
    provide more stable setup.
  • On mains input side, frayed mains lead replaced with 3m cable and integral BS1363A mains plug.
    Unsafe and cracked square fuse holder (348 series) replaced with modern day equivalent. DP
    241-8-36 mains transformer replaced due to excessive mechanical noise and hum. Wiring replaced
    and re-terminated as required.
  • CPU PCB 3 also cleared of all tantalum capacitors and replaced with aluminium types. Replace
    burnt 10R 1/2W resistors in +15V HV level shifter circuit. Replace badly repaired multiplexer IC
    with 3 x CD4051BE. Replace depleted 2/3A tabbed battery.
  • In order to stabilise voice board PCB 4 detect and replace certain corroded IC sockets and
    replace. Remove and assemble new 60 way ribbon between PCB 3 & 4, some connection of which
    were going partially open circuit. Replace tantalum capacitors with aluminium types.
    Remove jack earthing wire and replace. Also change audio out jack with highly intermittent
    connection. Clean all others and replace jack nuts and washers.
  • Keyboard cleaned, re-bushed, greased, aligned and cleaned.
  • Reassemble unit with working electronics and test. Recalibrate VCO and VCF tuning. Check and
    calibrate final VCA levels between voices. Remove ‘resonance mod’ on voice 1, replace with
    correct 200K resistor and correct fault masked by modification (partial track disconnection
    around filter).
  • Add new ‘Sequential’ and ‘Prophet-5’ labels to refurbished woodwork. Reload factory patches and
    perform full 1 week soak test.


The face is excellent is excellent cosmetically with only very minor signs of age. The case has been professionally restored and is in superb condition. Currently we only have the one photo you see here but more shots can be sent on request (if you purchase the synth we will send more shots before it ships if needed).

Voltage Information

Switchable voltage for use anywhere in the world - it will be set up ready for you to use before we ship.


For sales in UK/EU the price will include 20% VAT. VAT-free sales are possible to businesses and individuals in the EU (outside the UK) with a valid VAT Number - please get in touch if you wish to buy this way.

Video Demo

Another Rev 3 we had through in action:


"The packing job to get it over to the US was superb, and the sound and performance of my Space Echo exceeds all of my expectations. I hope to do business with Soundgas again in the future. Many thanks!”

Rhett Daily

"Soundgas provided the absolutely top service in terms of item quality as well as service and communication. Shipping was fast, packing was top notch. These people deserve the best reputation they already have. Many many thanks, guys."

Dupille Luc

“I purchased a completely overhauled vintage valve Binson Echorec 2 T7E modified with varispeed, wet-only output, and a new paint job from Soundgas in early 2018. Tony and his team did an amazing job during every step of the purchase”

Matt Morton

“The perfect place to hear, learn about and then buy your most wanted piece of vintage music gear! I've not only managed to buy a rare piece of equipment I really wanted, but I have the guarantee it's been serviced, and I got it from people who are clearly passionate and knowledgeable about what they do, as well as super friendly and responsive by email. Thoroughly recommended!”

Colleen / Cécile Schott

"DREAM. COME. TRUE. My music has taken me around the world a few times...and if you are like me and absolutely adore vintage gear...Soundgas is the stuff of LEGENDS. It's the shop that people like us search for our whole lives- fantastic and rare selections, and the technical know-how to repair and or mod these vintage items to get them into shape to flow with your modern setup."

Tom Gossin

"Packed with love and care. A stampede couldn't have crushed this thing. Works great and sounds like a dream. I love you Soundgas."

Ben Van Vlissingen

“If not a new language, then at least a very challenging, old dialect that will take me some time to assimilate. I’ve been waiting a long time for the challenge. Thank you @soundgasltd, she’s a beaut...and nobody prepares and packs like you fine folks.”

Justin Meldal-Johnsen

Just wanted to say thank you so much for your pinch roller and echo tape. I've had a space echo for years, been sent to a shop in NYC and it never worked quite right. After installing the roller and tape, my echo works like a dream. Really incredible expertise you all have! Thank you.

Andrew Potter

"Soundgas has an unbelievable selection of the cool, old stuff that’s hard to find. Tony knows his stuff and goes out of his way to make sure the transaction is a smooth one. Thanks guys!"

Tucker Martine - Flora Recording

"Just received my Roland RS 505 Paraphonic! Thanks so much - arrived very promptly, well packaged, in great condition and sounds amazing! Best seller."

Koko Hiras

Purchased a Juno-60 and it works beautifully. Having gotten one teched before, I knew it was worth paying a premium to get it future proofed and Soundgas does just that. Shipped professionally from the UK to USA. Appreciate their expertise and professional demeanor!

Eric Cullen

“Imagine the perfect eBay.... with everything you never knew you wanted… and you can rest assured that your vintage and rare wobbly sound device will turn up on time and in one piece and possibly in even better condition that when it left the workshop. Soundgas - literally amazing."

Josh Lloyd-Watson & Tom McFarland - Jungle

"Yes, sure, you can find a Space Echo on eBay, but you won’t find one like this — that’s certain. I am so pleased with my decision to buy from Soundgas, and suggest you stop your search now and just send them a message. You will undoubtedly find yourself writing an ecstatic review about yours in short time."

Ben Evolo

Fantastic. From initial contact to the product landing at my door the service provided was outstanding. Safe and secure shipping, quality serviced product.

Tom Johnston

"Engaging with old gear can sometimes be filled with a lot of uncertainty, and I can't imagine what more could be done to reduce this aspect of it on top of the service you provide. Really phenomenal and I couldn't be happier."

Stephen Voinea

"Excellent equipment, wonderful service. I fully recommend Soundgas to anyone in the vintage gear market and I will definitely be a return customer. The gear itself was exactly as advertised and in great condition."

Hallam Kite

"When you are spending big money of vintage gear it's nice to have the confidence of impeccable service, sales and support... some of the best in the industry! Impeccable people, incredible equipment… my poor poor fiancé"

James DLR - Sofa Sound/Metalheadz

"Soundgas offer a great service, sourcing esoteric gear that works great."

Tom Rowlands - Chemical Brothers

Grabbed a Roland RE-201 (early edition killer pre-amp) and Roland DC-50. Absolutely STUNNING. These guys truly live up to the hype. They are meticulous in caring for the gear. Also, I have a few guitar pedal and plug-in emulations of tape-echo sounds and after plugging in the real unit I can't tell you how insane the difference is. It is incredible. Especially that tone from the early pre-amp! I am totally amazed. I am in heaven :) They made it safely to Nashville from the UK and were packed really really well! Thank you so much!! Worth every penny.

Chance Allen

“I’ve bought a number of items from Soundgas recently, and have been really impressed with their service. It takes the stress out of buying vintage gear to know it’s been properly (and faithfully) serviced or restored. Their after-sales service has also been exemplary. Highly recommended.”

David Wrench

I have been buying vintage stuff for a long time from resellers/stores/techs. I've never been so surprised and pleased after opening! Just received a Roland RE-201 and VX55 mixer, they look and sound amazing! Thanks to Tony/Declan for the service and the Soundgas team will be back!

Dong Yun Seok

"808 is up and running. It’s hard to stop playing it. Like even to eat. Extending testing is quality control and the quality of your stuff combined with customer service is one of the reasons Soundgas is so successful in my opinion."

Brett R

As good as it gets. Tony, Dec and team have been incredible, prompt communication, great advice and outstanding service. It really felt like my Polysix came from a loving home.

Ben Parm

“I have bought two Moog synths from Soundgas over the past year, and I cannot say enough wonderful things about their selection of vintage products, the level of service, diligent responses to email, and expedient shipping with copious protective packaging. Soundgas is an impressive operation. My synths also sound amazing! These folks have made my vintage keyboard dreams come true in short order!”

J Yates

"Still in shock! Can not believe how good the seller is. This product was inspected, and shipped from the UK to the USA quicker than orders from my home state. Highly recommend these guys."

Thomas Tedesco

“The Space Echo made its way to me - it looks and sounds beyond dreams, thanks guys for your great service and communication.”

Julius Bonson

“If you are a vintage audio gear head then this is the place you have been looking for all your life. Pretty much any piece of classic or obscure kit that you are after is available here... But the clincher for me is that the gear they sell has been restored by their top techs (unless otherwise noted) which is really very important when dealing with, for example, synths from 30 years ago.”

Lincoln Barrett / High Contrast

"Finally, a company that tracks down all those brilliant curiosities that bring so much character and personality to a studio."

Matthew Herbert


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