Repairs & Restorations
Rosen Sound · Burbank, California
Vintage Synthesizer
Repair & Restoration
Specialist care for vintage instruments, from studio classics to rare and technically demanding synthesizers. Serving musicians, composers, and studios in Los Angeles and worldwide.
Our workshop
Specialists in Rare, Irreplaceable Instruments
Rosen Sound specializes in high-end vintage synthesizer repair and restoration. Instruments such as the Sequential Prophet-5, Oberheim OB-X, Roland Jupiter-8, Yamaha CS-80, and EMS Synthi are regular fixtures on our benches.
We also have extensive experience with instruments whose complexity calls for particular care: the Memorymoog, Rhodes Chroma, early Prophets, and Oberheim Four Voice and Eight Voice systems are all staples in our day to day restoration work.
Our shop is equipped to accommodate large instruments, including the legendary Yamaha GX-1 and substantial modular systems.
Brands we service
Roland, Korg, Sequential Circuits, Oberheim, Moog, ARP, EMS, Yamaha, EML, PPG, Crumar, and ELKA, among others. Some models are excluded.
Resources behind the work
Parts, spares, and working references
Successful restoration depends on having the right parts and the means to diagnose a fault properly. We maintain a stock of more than 2,000 rare and common parts, including parts and assets acquired from three closed repair businesses.
We also reproduce otherwise unavailable components and circuit boards to support our restoration work.
Our rental collection provides working examples of most instruments we service. Comparing signals, operation, and sound against a known working instrument helps us diagnose faults accurately and avoid unnecessary component replacement.
Restoration with reliability in mind
We aim to return each instrument to its original electronic performance. Where a design had reliability problems from the factory, we apply the techniques and retrofits we've developed to address them while preserving the instrument's fundamental sound.
A musician's perspective
Every technician at Rosen Sound is a musician with a focus on keyboard instruments. Keyboard action, tuning, and timbre receive the same attention as the electronics. We approach your instrument with the care we'd expect for our own, in the studio or on stage.
Rosen Sound
Our team
Our team brings decades of combined experience in synthesizer repair, electronics, touring, and studio work.
- Rob RosenPrincipal Technician
- Tony WhiteTechnician
- Dan EvansTechnician
- Desi ScaglioneTechnician
- Freddie BayneAssistant Technician
- EnzoAssistant Technician
- Jolene AndersonJuno Technician
Principal technician
Rob Rosen
Rob has repaired keyboards and synthesizers in the Los Angeles area for more than a decade. His restoration work is known internationally, and he consults with other repair shops throughout the US and abroad.
His work also extends to sound design, sampling, and programming for recording artists. Rob and the team’s work supports many of the artists and studios behind today’s most widely heard music. View our client list
Getting your instrument to us
Local Service & Worldwide Shipping
We work with clients throughout Los Angeles, across the United States, and internationally. For domestic shipments, we can coordinate air cargo transport to and from the shop. Contact us before shipping so we can discuss packing and transport arrangements.
Repair correspondence is handled by email.
Visits to the shop are by appointment.
Service limitations
Instruments we don't accept
We do not accept the following for repair:
- Alesis Andromeda
- Korg Polysix
- Korg Poly-61
- Soviet synthesizers
- Italian synthesizers (except the Synthex)
- Moog Satellite
- Ensoniq synthesizers
If you're unsure whether we service your instrument, please check with us before sending it.
Discuss your restoration
Contact the shop with your instrument's details and the work you have in mind.