For sale is an ARP Quartet, the ARP-branded version of the Italian-made Siel Orchestra, a classic late-1970s analog ensemble synthesizer known for its lush strings, brass, organ, and piano sections. These instruments have earned a cult following for their distinctive vintage character and rich ensemble sound.

This instrument was professionally serviced by a respected vintage synthesizer technician at Vintage Pro Audio in San Francisco in 2019. Since servicing, it has seen extremely limited use (appearing on only a single recording project) and has otherwise been stored in a climate-controlled studio environment.

The synthesizer is in excellent cosmetic and functional condition. All functions operate properly, all keys trigger as expected, and the instrument is ready for studio or collection use. One strings-section slider cap (Violin) has been replaced; all other knobs, slider caps, and cosmetic components remain original.

This is a particularly clean example that has avoided the wear, neglect, and reliability issues often associated with vintage keyboards of this era. Whether you're a collector, synthesizer enthusiast, recording artist, or fan of classic string machines, the Quartet delivers the unmistakable analog ensemble sound heard on countless recordings.

Highlights:

• Fully functional and studio-ready
• Professionally serviced in 2019
• Excellent cosmetic condition
• Stored in a studio environment since servicing
• Original components throughout, except for one replaced strings slider cap
• Rich analog strings, brass, organ, and piano sections
• Rare ARP-branded version of the Siel Orchestra

A fantastic opportunity to acquire a well-maintained vintage ARP instrument that is ready to be enjoyed for years to come.