The Ortofon M 15 is a vintage moving magnet cartridge that was popular in the 1970s. It is designed to provide high-quality audio reproduction and is suitable for use with a variety of turntables. The cartridge features a spherical stylus, which helps in tracking the grooves of vinyl records with precision. The M 15 is known for its warm sound signature and dynamic range, making it appealing for both casual listeners and audiophiles seeking a nostalgic sound. Key specifications typically include an output voltage of 5mV, a frequency response range of 20 Hz to 22 kHz, and a recommended tracking force of 1.5 to 2.5 grams. The cartridge is also praised for its ease of installation and compatibility with standard headshells, ensuring it can be used in various audio setups.