SIEL Opera 6 Polyphonic Synth - Excellent - SERVICED w/ Custom Battery Upgrade + Original Manual & Tape + Hard Case

Up for sale is a magnificent and rare piece of Italian analog history: the SIEL Opera 6. This 6-voice polyphonic synthesizer is in excellent cosmetic and functional condition, making it a stellar addition for professional studios, synth collectors, and sound designers.Equipped with legendary SSM chips (the same DNA found in the Korg Polysix and Sequential Prophet-5), the Opera 6 delivers rich, warm, and aggressive analog tones, featuring dual oscillators (DCOs) per voice, a resonant low-pass filter, and full velocity sensitivity—a rarity for synths of its era.
Key Features, Service & Upgrades:

• Fully Serviced: Professionally inspected, cleaned, and calibrated by a vintage synth specialist. All sliders, tactile buttons, and keys register flawlessly.
• Battery Upgrade & Replacement: The notorious original internal battery has been removed. It has been replaced and upgraded to a modern, safe battery holder system to completely eliminate future leakage risks and ensure your presets remain securely stored.
• Original Manual & Factory Tape Included: Comes with the rare original printed manual and the original cassette tape containing the factory sound banks for complete restoration.
• Excellent Cosmetics: The front panel graphics are crisp, and the chassis shows only minimal, honest signs of wear for its age. An incredibly clean specimen.
• Hard Case Included: Ships inside a heavy-duty, protective hard case ensuring the synth remains secure during transport and storage.

Shipping & Packaging:

• Worldwide Shipping: Available to international buyers and collectors.
• Professional Packing: Bulletproof packaging using the box-in-a-box method, heavy-duty bubble wrap, and rigid foam corner protection to guarantee safe delivery.
• Safe Delivery: Fully insured and tracked shipping.

Opportunities to buy an Opera 6 this complete, serviced, and with its original accessories do not come around often. Feel free to message me with any questions or for a precise shipping quote to your country!

Please Note (Terms of Sale):
This is a private sale of a vintage instrument. The item is sold strictly "As-Is" with no warranties expressed or implied. Due to the vintage nature of this gear and the precision of the modifications, all sales are final and returns will not be accepted. By purchasing this item, the buyer explicitly agrees to these terms and acknowledges being fully aware of the no-return policy.