The OM D25M is a magnetic cartridge (MM) with a spherical stylus that is an optimal solution for playing mono 25µm microgroove vinyl records, which require a slightly larger stylus profile for best sound reproduction.

OM D 25 M Technical Data:

Output voltage at 1000 Hz, 5cm/sec.: 4 mV, Lateral (mono)

Channel balance at 1 kHz

Channel separation at 1 kHz

Channel separation at 15 kHz

Frequency range: 20-20.000 Hz

Frequency response: 20-18.000 Hz +3 / - 2 dB

FIM distortion at recommended tracking force, DIN 45.542: < 1 %

Tracking ability at 315Hz at recommended tracking force: > 70 µm

Compliance, dynamic, lateral: 7 µm / mN

Stylus type: Spherical

Stylus tip radius: R 25 µm

Equivalent stylus tip mass: 0,5 mg

Tracking force range: 2,0-3,0 g (20-30 mN)

Tracking force, recommended: 2,5 g (25 mN)

Tracking angle: 20°

Internal impedance, DC resistance: 750 Ohm

Internal inductance: 450 mH

Recommended load resistance: 47 kOhm

Recommended load capacitance: 200-600 pF

Cartridge colour, body/stylus: Black/Black

Cartridge weight: 5 g

Replacement stylus unit: Stylus D 25 M

Details on Ortofon Cartridge and Stylus Installation and Maintenance

A Brief History of Ortofon

Ortofon Stylus History Chart

Ortofon OM Series Product Literature PDF