🙋🏻‍♂️ Welcome to SynthFreak!

Hey and thank you for visiting my shop and for your interest in this synthesizer! Every instrument in my shop comes from my private collection and is treated with the highest level of care. My mission is simple: you receive a vintage instrument that performs flawlessly, not a "fixer-upper."

Before any item is listed, it undergoes a rigorous, multi-stage inspection by our technician. I know my prices reflect a premium compared to "as-is" listings, but this is a deliberate choice. When you buy from me, you are investing in a fully verified, professionally serviced, and risk-free collector’s item that is ready for the studio the moment you plug it in. You avoid the hidden repair bills and frustration that often accompany cheaper, unverified gear.

💎 Why You Invest in Quality

My pricing directly reflects the extensive time, technical expertise, and premium materials required to deliver an investment-grade instrument. Here is exactly what is included in your purchase:

• 🛡️ Double Technical Verification: Every instrument undergoes a comprehensive checkup before being listed. To guarantee perfection, the entire unit is tested again right before it is packed. Any component replacement, calibration, or display upgrade is handled by specialists so you receive a turn-key, flawless instrument.
• 📦 Premium Custom Packaging: Vintage electronics are fragile and irreplaceable. To ensure 100% safety during international transit, we do not use standard shipping methods. We spend hours custom-building heavy-duty, multi-layered packaging or bespoke wooden crates. This professional-grade preparation guarantees that your investment arrives in the exact condition described.
• 🚀 Worldwide Fastest FREE Shipping: I believe in delivering excellence to your doorstep without extra costs. Every purchase includes expedited, fully insured worldwide shipping at no additional charge, ensuring your instrument arrives as quickly and safely as possible.
• ⚡ Power & Global Connectivity: My instruments are configured for EU 230V. If requested, I can perform a free internal voltage conversion where technically possible. If not, I recommend a high-quality external step-up transformer (approx. $50). This is the preferred, risk-free solution for 90% of my international customers, allowing you to power multiple EU-spec devices simultaneously without compromise.
• 📑 Customs & Import Optimization: International shipping often brings unexpected financial burdens. Our dedicated logistics team reviews each shipment individually to prepare customs declarations strategically. This compliant, professional approach helps minimize or entirely avoid unnecessary import fees and taxes for you.
• ✅ Transparency & Peace of Mind: I document the entire process and prioritize full professional transparency. You avoid the hidden risks, dirty interiors, and immediate repair costs that often come with cheaper 'as-is' listings from private sellers.

Enjoy reading the description.

🎹 Information about the Item for Sale I am offering the legendary Roland Jupiter-4, the historic first synthesizer to bear the majestic "Jupiter" name. Released in 1978, the Jupiter-4 is an absolute analog purist's dream. It represents an era where polyphonic synthesizers were transitioning into microprocessor control (famously dubbed the "Compunicator" series by Roland), offering patch memory alongside raw, discrete analog circuits.

The Jupiter-4 is universally famous for its incredibly fat, unstable, and organic sound character. Unlike the later Jupiter-8, which sounds smooth and polished, the Jupiter-4 is aggressive, raw, and full of vintage attitude. Driven by its single robust VCO per voice (with sub-oscillators), its legendary IR3109 low-pass resonant filter, and one of the thickest, most beautiful analog Stereo Chorus circuits ever designed, it easily creates earth-shaking basses, cutting leads, and beautifully nostalgic, swirling pads.

Technically, this Roland Jupiter-4 is in excellent operational condition. These early polyphonic synthesizers require expert care to ensure voice allocation and tuning remain stable—this unit has been thoroughly checked, calibrated, and cleaned. All toggle switches, sliders, the built-in arpeggiator, and preset buttons respond beautifully. Optically, it is in gorgeous vintage condition, complete with its classic chunky aesthetic and original side panels showing only minimal, normal signs of wear from its long history.

Please note: This listing includes the Roland Jupiter-4 and the power cable.

🔌 Optional MIDI Upgrade This instrument is currently in its 100% original, unmodified condition to preserve its maximum collector's value. However, if you require MIDI integration for your modern studio setup, a professional installation of the premium hamburg·wave MIDI/CPU Upgrade Kit is optionally available upon request before shipping. Please contact me to discuss the details!

⚙️ Specifications

• Type: Rare Vintage Polyphonic Analog Synthesizer
• Manufacturer: Roland
• Model: Jupiter-4 (Compuphonic)
• Era: Late 1970s (Introduced 1978)
• Keyboard: 49 keys (4 Octaves)
• Polyphony: 4 Voices (Unison, Poly, and Solo/Mono play modes)
• Voice Architecture: 1 VCO per voice (Sawtooth, Square, Pulse waves) + Sub-Oscillator + Noise Generator
• Filters: High-pass filter and legendary IR3109 24dB/octave low-pass resonant filter
• Effects: Integrated, premium analog Stereo Chorus engine
• Performance Features: Built-in classic Arpeggiator, Portamento/Glissando, and multi-mode modulation layout
• Memory: 8 Factory Presets + 8 User-programmable memory slots
• Sound Character: Gritty, raw, unstable, and unforgettably organic analog warmth

📹 Video Before & After Purchase Any interested buyer is welcome to request a video demonstration of the instrument. Additionally, each buyer receives a detailed functional check video before shipping, so you can see and hear your Roland Jupiter-4 cycling through its voices, arpeggiator modes, and chorus sweeps. If any issue is discovered during this final inspection, it is immediately corrected by our technician.

💲 Prices It is very important that my instruments go into good hands.

• Price proposals are welcome
• If you are seriously interested, feel free to make an offer
• Reasonable proposals will always be considered

⚠️ Information

• All instruments come from my private collection
• The collection is continuously updated
• Each instrument is cleaned, tested, and carefully prepared for sale
• Instruments are protected against dust and damage

📦 Secure Packaging

• The instrument is wrapped in multiple protective layers for safe transport
• Special focus is given to protecting the heavy control panel sliders and the classic 49-note keybed assembly
• Fully insured shipping

💢 Shipping

• Best, fastest, and safest shipping option selected depending on destination
• Fully insured shipping
• Export documentation included if required for international shipping

⚡ Power and Connection Standard power connection (EU voltage configuration, non-EU buyers please use an appropriate high-quality transformer/adapter if required).

💯 Your Advantages

• ✅ Professionally checked instruments
• ✅ Tested and cleaned
• ✅ Iconic 70s discrete analog voice architecture
• ✅ Worldwide insured shipping
• ✅ Export documents included
• ✅ Verified seller
• ✅ Secure payment
• ✅ Animal-Free & Non-Smoking Household

⛔ What are you waiting for!? The Roland Jupiter-4 is an absolute legendary beast whose unique 70s character simply cannot be emulated or replaced. Protected by extremely secure, multi-layered packaging, this raw analog titan is ready to make a massive impact in your studio! 😉