Audio Origin

B&O Stylus Retipping and Cartridge Restoration

7 year guarantee

A brief overview of stylus specifications


This is a basic stylus type and the most common, it will be the original stylus of many systems. The main drawback of this stylus type is its unable to accurately reproduce some of the higher frequencies, i.e. adds some distortions, particularly evident on classical music, none the less many people are perfectly happy with these styli. This specification is not usually offered because elliptical is a vast improvement.

Useful life: 1000 hours under ideal conditions.


This is a spherical diamond that has some of the front and back ground off, this allows the diamond to more accurately reproduce high frequencies The upgrade to elliptical is quite evident in sound quality in the vast majority of systems.

Useful life: 1000 hours under ideal conditions

Shibata diamond

This is one of the line contact designs it allows the diamond to more accurately reproduce high frequency’s, in comparison to the elliptical design, it has more contact area, and is able to track with slightly less force. This represents a further upgrade in sound quality over the Elliptical. In addition it lasts longer.

Useful life: 2000 hours under ideal conditions

Nude Micro Ridge diamond, boron cantilever

Micro Ridge is an advancement of the contact line design, it lasts about 2x longer than contact line styli such as the MMC1. While sapphire has previously been a popular cantilever material of choice for high-end listening, it is more than matched in performance terms by boron. Boron is better than sapphire for audio quality due to being harder. It measures 9.5 Mohs with diamond at 10 Mohs and sapphire at 9 Mohs. Since it is harder than sapphire it is also much less likely to break in the event of an accident. This specification surpasses all original Bang and Olufsen designs.

Useful life: 4000 hours under ideal conditions

Take a look below to find the original specification for your cartridge;

SP series,
SP14 bonded spherical
SP10 nude spherical
SP12 nude elliptical

MMC20S bonded spherical
MMC20E bonded elliptical
MMC10E bonded elliptical
MMC20EN nude elliptical
MMC20CL nude line contact sapphire cantilever

MMC3000 bonded spherical
MMC4000 nude elliptical
MMC5000 bonded contact line, titanium cantilever
MMC6000 Pramanik (a line contact variant) beryllium cantilever

MMC5 bonded elliptical
MMC4 bonded elliptical, tapered cantilever
MMC3 nude elliptical, tapered cantilever
MMC2 nude contact line, sapphire tube cantilever
MMC1 nude contact line, sapphire tube cantilever

What's the difference between nude and bonded?

A nude stylus is one solid gemstone, usually diamond. This gives the best audio quality. A bonded stylus has a small diamond bonded to a shank.

What is a cantilever?

It is a small rod that holds the diamond, some people call it the needle. It is usually well protected with plastic coverings/guards above it.


conversion to mono £20 available for all B&O cartridges

Postage options

Royal mail postage options, if no preference cheapest will always be applied

UK free post (£50 insurance) or for more insurance (£500/£7.25 ) (£1000/£8.25) (£2500/£10.25)

Worldwide + £8.00 (£50 insurance) or for more insurance +(£250/£2.50)


If your coils are broken it is often not possible to repair the cartridge, and if repairs are possible they cost an extra £25, therefore, you may want to test your coils before you place an order.
Every stereo phono cartridge has two coils one for each channel. The best way to test that these coils are functioning as intended is to use an ohm meter to test the resistance. Each coil should measure about the same as the other. If both are the same or similar resistance then the coils are fine.
For B&O styli and cartridges this method can be applied for the MMC1-5 cartridge, the resistance should be approximately 700-800 ohms for this series. The two opposing pins are one coil and the other two opposing pins are the other coil. If both coils measure about the same resistance then it's fine.
For other cartridges the resistance varies but this method can be applied to any stereo phono cartridge. Or if you are able to play a record and audio comes from both channels as long as your system is all working correctly and mono is not engaged then both coils are fine.,
For the MMC20xx and MMCx000, these are difficult to test as the contacts are hard to get to. The easiest method is to use one of the ¼ inch adapters to make the contacts easier to test. If you do not have one of these then you can use thin probes to test inside. For this series the two furthest to the right are one coil, and the two furthest to the left are the other coil. The resistance should be approximately 700-800 ohms for each coil.

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