Audio-Technica Studio Reference Series 3003 phono cartridge - LP Gear Special Studio Reference Series are best known for their excellent musicality, outstanding value, high technology and reasonable price. Highly polished .0003 x .0007 inch special elliptical diamond traces record grooves with precision and minimal wear Thin-wall tube cantilever for low mass, high sensitivity and low resonance Wide and extended frequency response with low distortion: 15 - 27,000 Hz Fits P-mount T4P or standard half-inch tonearms with the supplied adaptor