Historical product

Ortofon Series 300 Moving magnet cartridges

Read more about the introduction of our Ortofon Series 300 Magnetic Cartridges by downloading the leaflet.

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
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