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Product Variants
2M 78
The 2M 78 features an improved engine, which provides a high level of sonic accuracy. The stylus' tip is a Spherical diamond that is perfect for playback of 78 rpm shellac records, which require a larger stylus profile. The cartridge body is manufactured from Hopelex, which ensures high rigidity while eliminating unwanted resonances.
2M 78 uses a strapped output to deliver the same output signal from both sets of pole pins. This effectively eliminates the need for mono-specific equipment, making it possible to enjoy true mono reproduction on any stereo playback system.
The 2M Series provides excellent compatibility when used in an assortment of playback systems and with a wide variety of phono preamps.
Read more about Ortofon True Mono cartridges range »
2M 78 Technical data
Output voltage at 1000 Hz, 5cm/sec. - 4 mV
Frequency response - 20-20.000 Hz + 3 / - 1 dB
Tracking ability at 315Hz at recommended tracking force - 70 µm
Compliance, dynamic, lateral - 18 µm/mN
Stylus type - Spherical
Stylus tip radius - R 65 µm
Tracking force range - 1.6-2.0g (16-20 mN)
Tracking force, recommended - 1.8 g (18 mN)
Internal impedance, DC resistance - 700 Ohm
Internal inductance - 350 mH
Recommended load resistance - 47 kOhm
Recommended load capacitance - 150-300 pF
Tracking angle - 20°
Cartridge colour, body/stylus - Black/Grey
Cartridge weight without screws - 7.2 g
Premounted cartridge weight - 16.7 g
Replacement stylus unit - 2M 78 (interchangeable with 2M Mono)
Stylus lifetime: with proper care we find that up to 1000 hours is possible without degradation of performance. Please read about stylus care on our FAQ.
2M Series styli interchangeability:
The 2M Series' engines, coils and magnets configurations are not identical: Red and Blue are identical, so are the Bronze and Black and so are the true mono variants 2M Mono and 2M 78. Likewise, 2M series styli are interchangeable within the below combinations:
- 2M Red, 2M Blue and 2M Silver
- 2M Bronze and 2M Black
- 2M Mono and 2M 78
Compatibility with Rega brand TT/TA:
REGA brand cartridges’ height from stylus tip to the top cartridge mounting surface is lower than standard. Therefore you would need spacers to ensure the correct set-up of the Ortofon cartridge. Please read about cartridge set-up and alignment on tonearm on our FAQ.
Adjusting the height of your Rega tonearm is easy with Acoustic Signature's Spacer Set. It allows you to adjust the height from 0.5 mm to 3.5 mm in precise steps of 0.5 mm - without removing the tone arm. Simply loosen the screws, insert the AS-spacer, then lock the screws back down, and you're tonearm is ready to play.
3.2 - 4 mm spacers should be enough for 2M cartridge.
Download the 2M series userguide
Download the 2M series brochure
Review quote 2M 78
Hi-Fi World April 2013
Reviewed by Tony Bolton
Sensational schellac!
"...Well thought out MONO, standard groove version of respected 2M Series of cartridges...
- Detailed sound
- Low surface noise
- Fast and punchy rhythmus
- Excellent tracking at the recommended 1.8 g"
With the 2M Premounted, it's never been easier to experience.
The 2M Premounted is a practical and elegant solution for our customers who wish direct and easy mounting and replacement on their S-shaped tonearm. The quality of the SH-4 headshell is sturdy and rigid, yet the design emphasizes a slim and delicate form factor. The strong, lightweight headshell has an ergonomic design with a long finger lift that is easy to pick up.
Features:
- Mounted on our popular SH-4 Black headshell.
- Easy and direct mount on S-shaped tonearms with universal mount.
- Correct Baerwald alignment with tonearms with universal mount.
The 2M 78 Verso model is an alternative product for bottom mount headshells
To find the recommended Ortofon replacement cartridge for your turmtable/tonearm please check out Replacement Cartridges selector »
How to replace M2,0 mm screws on 2M 78 Verso
1. Remove the stylus with the stylus protection guard from the cartridge body to avoid any damage to the diamond.
2. Using Torx 8 key, unscrew the black screw from the Verso top plate.
3. Remove the top plate from the cartridge body by pulling the screws off.
4. Remove the two countersunk screws from the top plate.
5. Insert the two M2,0 mm screws in the top plate.
6. Mount the top plate on the cartridge body. Hold the top plate with screw-threads hanging down and turn the cartridge body 180 degrees. Mount from above.
7. Mount the black screw in the top plate and tighten with appropriate force.
8. Mount the cartridge on the tonearm using the enclosed tool.
9. Mount the stylus with the stylus protection guard on the cartridge body.
2M 78 accessories included the package
2M 78 accessories included the package:
- 1 x Stylus brush
- 1 x Screwdriver
- 2 x Screw M2,5 x 5
- 2 x Screw M2,5 x 7
2M 78 Premounted accessories included the package:
- 1 x Stylus brush
2M 78 Verso accessories included the package:
- 1 x Stylus brush
- 1 x Allen key Torx 6
- 1 x Allen key Torx 8
- 2 x Screw M2,0 x 6
The 2M Series is designed for precise and accurate retrieval of the information in the record groove
The 2M Series is developed in conjunction with the Danish Industrial designer Møller Jensen Design – the same designer who designed the award winning MC Jubilee and Kontrapunkt series. Inspired by the facets of a diamond, whose contours gracefully trace the grooves on a record’s surface, the 2M’s handsome elegance establishes a great combination of form and functionality.
The name 2M was selected from among several ideas. We wanted a modern name that would be easy to pronounce and remember, and therefore an alphanumerical name was chosen. 2M means MM, which is the abbreviation for moving magnet.
Of course the 2M isn’t just another pretty face. It has been engineered to the highest standards and is congruent with Ortofon’s unrelenting commitment to providing the most precise and accurate reproduction possible without coloration.
Each of the 2M Series cartridges has its own individual sonic expression, and all five models together represent the ensemble of five classic variations:
- 2M Mono SE, 2M Mono and 2M 78 are a true mono cartridges for playing mono vinyl records
- 2M Red is an all-purpose cartridge that delivers open, dynamic sound with a slight touch of warmth
- 2M Blue adds more dynamics and resolution, sounds more open and reproduces more details
- 2M Bronze adds even more details and resolution but in a very evenhanded way that pays respect to all elements
- 2M Black is the best of everything, true to the groove with resolution and accurate insight into each recording
The 2M series of cartridges features Ortofon’s trademark split pole pins, an invention that enables moving magnet cartridges to have a flat frequency response, as with a moving coil cartridge. Split pole pins were invented by Ortofon, and were originally presented in the 500 series and OM Super series.
We have optimized the design for ease of mounting the cartridge, and the weight and size to fit the most common turntables on the market today. The 2M Series provides excellent compatibility when used in an assortment of playback systems and with a wide variety of phono preamps.
