Mono MM cartridge with a 25 µm spherical diamond for mono microgroove records. Delivers 4 mV and works with standard MM phono inputs. Read more.
The Ortofon OM D25M is a Moving Magnet cartridge specifically tuned for playing mono microgroove records. Its 25 µm spherical diamond matches the groove geometry of many original mono LPs, EPs and singles. With a 4 mV output, the cartridge can be connected directly to a standard MM phono input. The replaceable stylus also makes future maintenance straightforward without requiring replacement of the complete cartridge.
Explore all Ortofon products and our full range of turntable cartridges.
| Product type | Moving Magnet mono cartridge |
| Output voltage | 4 mV at 1 kHz, 5 cm/s, lateral (mono) |
| Frequency range at -3 dB | 20 - 20,000 Hz |
| Frequency response | 20 - 18,000 Hz (+3/-2 dB) |
| Tracking ability at 315 Hz | More than 70 µm at recommended tracking force |
| Dynamic lateral compliance | 7 µm/mN |
| Stylus type | Spherical diamond |
| Stylus-tip radius | R 25 µm (1 mil) |
| Tracking-force range | 2.0 - 3.0 g (20 - 30 mN) |
| Recommended tracking force | 2.5 g (25 mN) |
| Tracking angle | 20° |
| Internal impedance | 750 ohms |
| Internal inductance | 450 mH |
| Recommended load resistance | 47 kOhms |
| Recommended load capacitance | 200 - 600 pF |
| Mounting | Standard half-inch mount |
| Cartridge/stylus colour | Black/black |
| Weight | 5 g |
| Replacement stylus | Ortofon Stylus D 25 M |
The OM D25M is particularly suitable for original mono LPs, EPs and singles with microgrooves intended for a 25 µm stylus. Carefully mount and align the cartridge, then set the tracking force to 2.5 grams. This cartridge is not intended for standard 78 rpm shellac records; for those records, choose the Ortofon OM 78 with its larger 65 µm stylus.
Find the order you'd like to withdraw
Enter your email address and order number.
Check your mailbox
If your details match an order, you'll receive an email with a link to view and manage it.
