Audio Technica AT100E Phonograph Cartridge Frequency Response: 20-20,000 Hz Channel Separation: 27 (dB at 1 kHz) Vertical Tracking Force: 1.0-1.8 grams (1.4 grams optimal) Recommended Load Impedance: 47k Output: 4.5 (mV at 1 kHz, 5 cm/sec)