RSF @ 03 January 2017, Comments Off on RSF blackbox

rsf “RSF Blackbox.Macht monophones synthesizers polyphone.
Funktioniert einwandfrei,netzteil ist 230V” Link

RSF @ 20 December 2016, Comments Off on RSF Blackbox

rsf-blackbox “RSF Blackbox.Macht monophones synthesizers polyphone.
Funktioniert einwandfrei,netzteil ist 230V.” Link

RSF @ 19 February 2013, Comments Off on RSF Blackbox

“Up for sale is an (1) extremely rare RSF Blackbox, family of the RSF Kobol. It’s a 18 keys synthesizer made in the seventies by Ruben and Serge Fernandez in France. The synthesizer works perfectly! Optical it looks ok for it age, the wooden sides are a bit damaged (see photo’s). It’s a 220V version and the serial number is: 13239.” Link

RSF @ 19 February 2013, Comments Off on RSF Kobol Expander I

“Here is for sale a rare example of a perfectly working RSF Kobol Expander I, one of the most sought after synths of the 80s.
Only around 800 units manufactured !
Probably one of the best sounding mono synths ever built.
Note this is a 220-240v European voltage model. You must use a transformer to work with 115V US power (transformer not provided).

I have seen one of these sell via a private auction end of last year in the U.K. for a little more than £4500/5000 euros.
So don’t miss this chance to get one of the most charismatic modular synths of its (all) time(s) !!

(check my other auctions I am also selling its companion the ultra-rare Expander II)

Some called it the French answer to the MiniMoog, among other great features it has :
1. An incredibly pure and powerful tone, due in part to its high quality components
2. analog morphing waveforms (UA726 Fairchild)
3. SSM filters and envelopes (2040 & 2050)
4. and many others (see below)

It’s basically the RSF Kobol only without keyboards and presets but with many patch points and features added :

2 VCOs with sweepable waveforms
2 ADS envelopes
1 LFO (triangle or square)
1 VCF very musically self-oscillating 24db low pass
1 VCA
1 noise generator
1 reversible voltage processor
Decay on/off
VCO 1 modulation off
VCO sync
VCO detune
VCF in
CV/gate 1 volt/octave” Link

RSF @ 25 September 2012, Comments Off on RSF Kobol

“Great shape RSF Kobol. Beautiful sound, morphing waveforms SSM filters!!

If your looking at this then you know what it is and how rare and lovely it is!” Link

RSF @ 07 August 2012, Comments Off on RSF blackbox

“RSF SYNTHESIZER “BLACK BOX”

SYNTHESIZER EXTREMELLY RARE, COLLECTIBLE ITEM !

MINT CONDITION, TUNED TO SPEC!” Link

RSF @ 14 February 2012, Comments Off on RSF Kobol Programmer

“Amazing Shape RSF Kobal Programmer! Rare ! If your looking at this, then you know what it is.

In Great Shape!! Use it to store and sequence programs on up to four RSF Kobol expander I’s or Expander II’s !

Works Great. This is a 220-240v European voltage model. You must use a transformer to work with 115V US power.

Transformer not provided. Do not plug this into a 115V US power outlet!

The unit works great. But due to it’s age there will be no returns. No partial refunds.” Auction ended. Click here to browse on eBay.

RSF @ 20 December 2011, Comments Off on RSF Kobol Expander II

“Amazing Shape RSF Kobal expander II ! Rare ! If your looking at this, then you know what it is.

In Great Shape!! Extra modulation sources for the Expander I. Can be also used with the programmer.

ADSR, Multi waveform LFO, Ring Mod, Gate Delay!! Voltage Processor, Extra VCA and Multis…

Works Great. This is a 220-240v European voltage model. You must use a transformer to work with 115V US power.

Transformer not provided. Do not plug this into a 115V US power outlet! ” Auction ended. Click here to browse on eBay.

RSF @ 11 October 2011, Comments Off on RSF Kobol Expander

“This is an auction for my RSF Kobol Expander II, an ideal partner for your RSF Kobol Expander but also just as easily integrated into a vintage modular or semi-modular synth system such as those from ARP, Moog, EMS, Roland, etc as well as modern modular synthesiser systems from the likes of MOTM, Synthesizers.com, Analogue Systems, Analogue Solutions, Doepfer, & all the Eurorack variety…

The mains plug & internal wiring has been modified to better comply with modern safety standards.
It’s for 230V EU mains voltage supply. (IEC lead not supplied.)

As the pictures show this is in superb condition for a 30 year old unit & I have cleaned it also prior to listing. (No sticky pots!)
The only visible marks are around the pair of rack mounting holes at either side of the unit & once racked these are of course then hidden anyway.

All functions as it should, though I don’t have the information regarding calibration & considering it’s age it may well benefit from a routine service.

These Expander systems were made by Ruben & Serge Fernandez of the RSF Synthesizer Company in France from 1979-81.
It uses an SSM 2050 chip for the envelope generator as well as other rare IC’s from that era alongside analogue circuit design.

Certainly vintage, it seems the Fernandez brothers were inspired by the Moog & Oberheim synths of the day but as the vintage synth crew know all too well, RSF instruments had a character all of their own, with some unique features that allow for amazing flexibility, especially on the Expanders, thanks mainly to extensive Control Voltage (CV) implementation for all the modules within the unit, as evidenced by the number of jack sockets around the edges- 40 in total. (Note these are for 1/4″ jacks & have been cleaned.)

There were only around 200 of these synth Expanders made so certainly a VERY RARE item.” Auction ended. Click here to browse on eBay.

RSF @ 04 October 2011, Comments Off on RSF SF140 Project Machine

“This machine was made in very small quantity in France in the 80s. Ruben and Serge Fernandez also made the famous Kobol series of analog synths. It samples sounds and allows you to tweak them and program drum patterns with them. It is lo-fi and beautiful when working. Sadly, this one stopped working on me years ago and I have moved it place to place, broken, ever since. I have had the intention of fixing it, but have never gotten around to it. There is a guy in France who repairs RSF stuff, but I didn’t really want to ship it there and back. At any rate, it’s awesome, but I need to thin the herd a bit. It has a few SSM2044 filters in it. It runs on 220 VAC.” Auction ended. Click here to browse on eBay.

RSF @ 13 September 2011, Comments Off on RSF blackbox


Here’s an Extremely RARE item from the French Synthesizers Made By Ruben & Serge Fernandez in the 70’s…

The RSF Blackbox is a small 18 keys mini synthesizer that can turn your Analog Monophonic Synthesizers into Polyphonic by the use of CV/Gate with both type of Voltage Source as CV Volt/Oct. And/Or Hertz Volts and Both Gate Types as Positive Gate (V-Trigger) or Negative Gate (S-Trigger).

So basically you can control & use every kind of Analog Synthesizer with this unit like Korg, Roland, Yamaha, Kawai, Sequential Circuits, Moog, ARP, Oberheim, Other RSF, Etc…

This unit runs on European 220 Volts and I include a Step Up/Down Converter so in case you wanna use it in America but if you are in Europe and buy this unit then let me know if you don’t need the converter because it is quite heavy and will add up a lot in the shipping cost because this converter is as heavy as the unit alone.” Auction ended. Click here to browse on eBay.

RSF @ 19 April 2011, Comments Off on RSF KOBOL

“One of the rarest Synths ever: RSF KOBOL.” Auction ended. Click here to browse on eBay.

RSF @ 19 April 2011, Comments Off on RSF Modular

“For sale here is a uber rare small modular system by RSF aka Ruben and Serge Fernandez from France,Toulouse.

Very low quantity of modules have been produced,around 280 in total.

This small system contains: 2x VCO2x VCA,1x VCF,1x ENV,1x Mixer,1x Power.

Needs TLC.Most schematics are present.” Auction ended. Click here to browse on eBay.

RSF @ 19 April 2011, Comments Off on RSF Modular

“For sale here is a other uber rare RSF Modular 11 system by Ruben and Serge Fernandez from France,Toulouse.

Not many of these modules have been built,around 280 between 1976-1978.

This system contains: 3x VCO,2x VCA,1x ENV,1x VCF,1x Mixer,1x ENV FOL,1x S/H & Noise,1x Power.

Needs TLC.” Auction ended. Click here to browse on eBay.

Modular, RSF @ 11 January 2011, Comments Off on RSF Modular with Polyclavier Keyboard

“Super rare RSF Modular 11 with Polyclavier.

These are extremely rare modules built by Ruben and Serge Fernandez from France,Toulouse.

These modules have been built in 1977 and 1978.Not more than 300 modules in total have been built for a total of 20 systems.

So RSF is even rare than old Buchla.

Some systems have been in private collections and been put into larger cases.So less than 20 systems are available.

These 2 systems are working on 220v,so a voltage converter will be needed to use it in the USA and Japan.

About 75% of the modules are working.They do need to be serviced,some pots cleaned,calibration,repairs,tuning,…

Whats in the systems: 5x VCO, 4x VCA, 2x ENV, 2x VCF, 2x Mixer,2x Power,1x ENV FOL,1x S&H/Noise.

The keyboard is a 8 voice keyboard with 8 seperate cv/gates, arpeggiator,sequencer wich can have sequences uploaded thru the cassette player/recorder from RSF.Keyboard is self-powered at 220V.

There is also a cassette player/recorder originaly built by RSF(stamp underneath)wich works at 220v.

It can be connected to the keyboard as there is a flat cable inside the keyboard that fits on the cassette player/recorder.

I also have paperwork and schematics to have certain repairs/services done to the modules.

Due to it’s age “SOLD AS IS”” Auction ended. Click here to browse on eBay.

Modular, RSF @ 19 October 2010, Comments Off on Lot of 11 Modules for RSF Modular Modules

“RSF Modular 11 modules:

2 x VCO, 2 x VCA, 1 x VCF , 1 x ENV , 1 x MNT = Mixer, 1 x ALM = power.(modules avant le clavier)

Cette modules sont impossible a trouver.

Jusq’ue a vendre car j’ai plus de modules.

Parfait pour DIY et bricoleur.

Modules pour l’elite.

Trés rare a trouver,plus rare de Buchla.

A vendre “comme il est”.

Envoye en France coute +-100 euro avec assurance de UPS.

RSF Modular 11 modulen:

2 x VCO , 2 x VCA , 1 x VCF , 1 x ENV , 1 x MNT = mixer , 1 x ALM = Powersuply.(modulen vor das keyboard)

Diese Modulen sind unmöglich zu finden.

Verkaufe daher ich zuviel modulen habe.

Gut für DIY und techniker.

Sehr sehr rare Modulen,noch seltener wie alte Buchla.

Also Modulen für die Elite.

Verkaufe “wie ist”.

Versand in Europa kostet +-100 mit versicherung von UPS.

RSF Modular 11 modules:

2 x VCO , 2 x VCA , 1 x VCF , 1x ENV , 1 x MNT = mixer , 1 x ALM = Powersuply.(modules in front of the keyboard).

These modules are impossible to find.

Only for sale because i have to much modules.

Great for DIY and technicians.

Super rare modules,even rarer than old Buchla.

So these are modules for the Elite.

Sold “as is”.

Shipping in Europe +-100 euro, with insurance from UPS.” Auction ended. Click here to browse on eBay.

Kobol Expander, RSF @ 01 June 2010, Comments Off on RSF Kobol Expander

“Very rare vintage RSF Kobol Expander I in near MINT visual conditions and FULLY working. It’s a monstrous analog semi-modular synthesizer based on SSM2040 + SSM2050 IC’s and Fairchild UA726. Its sound is impressive, very powerful on basses and awesome filter!!! Also it’s possible to change all the waveforms by control voltage (Waveshaper VCO’s)… It come with special option patch-control and programmer-ready sockets (all on the back). Working voltage supply: 220 / 240 volts. ” Auction ended. Click here to browse on eBay.

Blackbox, RSF @ 09 March 2010, Comments Off on RSF Blackbox

“Bonjour je vend une blackbox de chez RSF légendaire marque française.
celà rendra votre monophonique polyphonique, tout simplement.
fonctionne aussi bien pour les protocoles rolands/moog/korg
beaucoup d’info sur le net, échange possible contre analo…
dispo de suite à paris.” Auction ended. Click here to browse on eBay.