Weight. Richness. Depth. Sparkle. The Sumiko Moonstone transcribes sonic imagery with a presence and musicality that defies its position in the range — featuring a lightweight aluminium cantilever, elliptical stylus, high-purity copper coils, and a sonic character warm enough to draw you in and controlled enough to keep you there.

A Gem from the Sumiko Oyster Series

The Sumiko Moonstone belongs to the Oyster Series — a family of MM cartridges that has established itself as a benchmark for smooth, warm, and immersive analogue performance. The Oyster Series cartridges share a common philosophy: to reproduce music with the kind of organic warmth, textural richness, and effortless musicality that makes vinyl the format it is.

The Moonstone takes that philosophy further. By reducing moving mass through a lighter cantilever and magnet, it achieves greater transient accuracy and a more finely resolved sonic image — transcribing music with weight, richness, depth, and sparkle that is immediately apparent from the first listen. Texture and nuance are readily available to the ear. The sonic image is well-controlled, suspended over a black background, and delivered with a naturalness that allows extended listening without fatigue.

Critically acclaimed by SoundStage! (Editor's Choice) and Analog Planet alike, the Moonstone is a cartridge that rewards both careful setup and unhurried listening — one that fulfils every musical demand placed upon it with grace and precision.

Reduced Moving Mass — Lighter Cantilever, Greater Resolution

Sumiko's engineers understand that lower moving mass is one of the most direct paths to improved transient response and higher-frequency resolution. The Moonstone's lightweight 0.5mm aluminium pipe cantilever reduces the inertia that must be overcome with every groove modulation — allowing the stylus to track more accurately, respond more quickly, and retrieve more of the low-level information that lesser designs leave behind.

The result is a cartridge that handles dynamic contrasts with authority, renders high-frequency detail with sparkle and air rather than harshness, and delivers bass with genuine weight and definition. The sonic image is controlled and immersive, with the kind of three-dimensional staging that makes the listening session disappear and the music take over.

Elliptical Stylus — Precision in the Groove

The Moonstone's elliptical stylus (0.3 × 0.7mil) provides superior groove contact compared to a conical profile — reading more of the groove wall surface on both sides simultaneously, for improved channel separation, better high-frequency extension, and more accurate reproduction of fine groove detail. At a 25° vertical tracking angle and recommended tracking force of 2.0g, the Moonstone is optimised for musical and record-friendly performance across a wide range of tonearms and headshells.

High-Purity Copper Coils & Stylus Compatibility

High-purity copper coil wire generates a 3.0mV output signal — well-suited to any standard MM phono stage. Internal impedance of 1,130Ω at 1kHz, load impedance of 47kΩ, and recommended capacitance of 100–200pF ensure easy, predictable setup with virtually any amplifier or phono stage. Channel separation exceeds 25dB at 1kHz, with channel balance within 1.5dB — figures that underwrite the Moonstone's precise, well-defined stereo presentation.

The Moonstone accepts stylus replacements from the Sumiko RS Rainier, Olympia, Wellfleet, Amethyst, and RS 78 — providing flexibility and longevity across the life of the cartridge.

Feature Cards

💎 Reduced Moving Mass — Lighter Cantilever & Magnet

A lightweight 0.5mm aluminium pipe cantilever and lighter magnet reduce moving mass for improved transient accuracy, greater high-frequency resolution, and a more precisely rendered, lower-distortion sonic image over a deep black background.

🎵 Elliptical Stylus — Superior Groove Contact

A 0.3 × 0.7mil elliptical stylus reads more of the groove wall than a conical profile — delivering improved channel separation (>25dB), better high-frequency extension, and more detailed retrieval of the musical information etched into every record.

🌊 Oyster Series — Warm, Immersive, Effortless

Part of Sumiko's celebrated Oyster Series — a family of MM cartridges established as benchmarks for smooth, warm, and musically engaging analogue performance. The Moonstone extends that tradition with reduced mass, increased resolution, and a deeper sonic image.

🔄 Broad Stylus Compatibility

Accepts stylus replacements from the Sumiko RS Rainier, Olympia, Moonstone, Wellfleet, Amethyst, and RS 78 ranges — providing flexibility and long-term value across the full life of the cartridge body.

Editorial Blockquote

"With the Moonstone, when bass slam was called for, it came. When a sweet midrange was demanded, it was there in spades. When crisp, sparkling highs were the need, the Moonstone fulfilled it." — SoundStage! Editor's Choice

"Moonstone produced highly sophisticated, delicate, rich, somewhat warm sound free of any obvious mechanical artifacts and resolved a surprising amount of low level information sufficient to keep me listening for an entire evening." — Analog Planet

At-a-Glance Bullets

• Moving magnet (MM) phono cartridge — Sumiko Oyster Series
• Reduced moving mass — lighter cantilever and magnet for improved transient accuracy
• Elliptical stylus — 0.3 × 0.7mil
• Cantilever: 0.5mm aluminium pipe
• High-purity copper coils
• Output: 3.0mV (3.54cm/sec, 1kHz)
• Frequency response: 12Hz–25kHz
• Internal impedance: 1,130Ω (1kHz)
• Load impedance: 47kΩ
• Recommended capacitance: 100–200pF
• Channel separation: 25dB (1kHz)
• Channel balance: < 1.5dB (1kHz)
• Compliance: 12×10⁻⁶cm/dyn (100Hz)
• Vertical tracking angle: 25°
• Tracking force range: 1.8–2.2g — recommended: 2.0g
• Weight: 6.7g
• Compatible replacement stylus: RS Rainier, Olympia, Moonstone, Wellfleet, Amethyst, RS 78
• SoundStage! Editor's Choice — Analog Planet acclaimed

Specifications

Closing Quote

"Weight. Richness. Depth. Sparkle. The Sumiko Moonstone transcribes the full emotional spectrum of your records — with a sonic image that is controlled, immersive, and free from fatigue. This is where the Oyster Series reaches new heights."