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Ortofon Series 300 Moving magnet cartridges

Please download Ortofon Series 300 MM cartridges brochure

Ortofon Series 300 MM cartridges technical data

Technical data 320 / 320 Universal 310 / 310 Universal 305 / 305 Universal
Output voltage at 1000 Hz, 5cm/sec. > 5.0 mV > 5.0 mV > 5.0 mV
Channel balance at 1 kHz < 1.5 dB < 2.0 dB < 2.0 dB
Channel separation at 1 kHz > 22 dB > 22 dB > 20 dB
Frequency response 20-22.000 Hz 20-20.000 Hz 20-20.000 Hz
Tracking ability (315Hz, lateral) > 70 µm > 60 µm > 60 µm
Compliance, dynamic (lateral) 25 µm/mN 20 µm/mN 20 µm/mN
Stylus type Fine Line Elliptical Spherical
Stylus tip radius r/R 8/40 µm r/R 8/18 µm 18 µm
Equivalent stylus tip mass 0.50 mg 0.50 mg 0.50 mg
Tracking force range     1.25-1.75 g
(12.5-17.5 mN)
1.25-1.75 g
(12.5-17.5 mN)
1.25-1.75 g
(12.5-17.5 mN)
Tracking force, recommended 1.5 g (15 mN) 1.5 g (15 mN) 1.5 g (15 mN)
Tracking angle (vertical) 20° 20° 20°
Internal resistance 100 Ohm 100 Ohm 100 Ohm
Inductance 550 mH 550 mH 550 mH
Recommended load resistance 47 kOhm 47 kOhm 47 kOhm
Recommended load capacitance 100-400 pF 100-400 pF 100-400 pF
Cartridge weight 5 g/6 g 5 g/6 g 5 g/6 g
Replacement stylus 320 310 305