Coralstone Platinum

About the Coralstone Platinum

The Koetsu Coralstone Platinum is a top-tier moving coil phono cartridge with a coral stone body, platinum magnet system, and silver-plated copper coils, designed to deliver highly resolving yet organically musical playback. Its boron cantilever and advanced line-contact stylus profile contribute to excellent tracking and retrieval of low-level detail, with a specified frequency response of 20 Hz–100 kHz, output of 0.3 mV, and internal impedance of 5 Ω. The cartridge weighs about 12–12.5 g and has a recommended tracking force of 1.8–2.0 g with a recommended load in the 75–500 Ω range, making it compatible with high-quality moving-coil phono stages. Voiced as one of Koetsu's upper-echelon stone-body designs, it is widely praised for its refined, cohesive, and tonally rich presentation, particularly with acoustic music and vocals, while still offering strong dynamics and scale suitable for a wide range of musical genres. Pricing has been listed around £8,498 in the UK and near the $15,000 level in the US market, reflecting its positioning as a flagship luxury cartridge.