M44E Response: 20 to 20,000 Hz Output voltage: 9.5 mV per channel Separation: >20dB at 1,000 Hz Tracking force: 1.75 to 4 grams Stylus: biradial (.0004 x .0007 inch) Weight: 6.5 grams Optimal load per channel: 47,000 ohms in parallel with 400 to 500 picofarads