BANG OLUFSEN MMC20E STYLUS CARTRIDGE B&O Beocenter 4600, 4800, 7000, 7002, 5000. Fully tested and working Any questions please ask thanks

Bang & Olufsen B&O MMC20E Stylus In Original Box. A fantastic Bang & Olufsen MMC20E Stylus/Cartridge in perfect working order. The stylus has been fully tested and works perfectly . The diamond looks like there is plenty of life left in it. Please study the photos as they make up part of the overall description. Thanks MMC20E Manufactured: 1979 - 1985 Designer: Jacob Jensen Colours: Black Prior to the release of MMC1 - 5 cartridges, Bang & Olufsen had the following MMC range of combined styli and cartridges: MMC cartridges were available with standard ½ mounting brackets, or with easy plug-in, lightweight connectors. These enabled you to mount MMC cartridges onto non-Bang & Olufsen arms. The cartridges plugged directly into Beogram pickup arms without additional mounting gear MMC 20 S was a stereo cartridge with a spherical framed diamond MMC 20 E was fitted with a framed elliptical diamond which has a high polish MMC 20EN had a naked elliptical diamond, mounted on a tiny tapered cantilever MMC 20 CL utilised a Contact Line naked diamond mounted on a single crystal sapphire cantilever. This shape ensures maximum groove contact. This was the most highly-specified cartridge in the MMC 20 range In 1958, Bang & Olufsen introduced the first stereo pickup cartridge ever made in Europe. This was called the SP1. Since then, many design innovations and the creative use of new materials have kept B&O's cartridges at the forefront of audio technology. By 1979 - 80, Bang & Olufsen's cartridges were represented by the MMC 20 series. MMC stands for 'Moving Micro-Cross'; the patented moving-iron principle upon which all B&O cartridges were based. This unique system employed a cross-shaped armature which, among other advantages, guaranteed exceptional stereo separation since each channel moves on a separate axis. The job of any pickup cartridge is to transform the record's physical profile (groove modulation) into corresponding electrical signals (which are then amplified or enlarged by the amplifier and turned into audible sound waves by the loudspeaker. A cartridge must perform three separate and exacting tasks if it is to do this job successfully. It must function mechanically (the movements of the stylus in the groove); it must function magnetically (using the physical movements to create changes in a magnetic field); and it must function electrically (using the changes in magnetic flux to generate an electrical current). At each stage, one type of energy is transferred into another, quite different, type. And the transfer must be perfect, with no energy lost and none added from extraneous sources. No cartridge will ever reach this ideal unless the Laws of Physics can be repealed. However, by understanding the relationships between the three transfer stages and continually applying refined engineering techniques, B&O's belief was that each stage of cartridge improvement would bring each successive cartridge closer to the ideal. The MMC20 series therefore represented the closest that modern technology at that time, could possibly afford. Record wear and the cartridge If you take music seriously the value of your record collection is likely to be high. Many of your records are likely to be irreplaceable. You will also know that the signals pressed into your vinyl discs are very fragile indeed. The pickup cartridge can be the disc's worse enemy since an ill-suited cartridge can mark a record for life in a single play. While B&O is aware that cartridge specifications are inter-related, their research shows consistently that Effective Tip Mass (ETM) is one of the major factors affecting record wear. ETM is the equivalent of the amount of inertia the groove 'sees' in moving or accelerating the stylus tip. Consequently, the higher the ETM value, the higher the force required for a given constant acceleration. Obviously, more force results in more wear. Three elements contribute to ETM. The stylus tip (diamond) contributes with its entire weight and mass. The armature contributes between 5 - 20% of its weight and mass; the cantilever around 30%. B&O has been able to reduce ETM substantially by refining these elements and building them into an integrated unit. The result is a system which not only reduces damage to the groove walls dramatically, but also provides exceptional performance at all frequencies. Bang & Olufsen cartridges have always been highly acclaimed for their low ETM values. The ETM of the MMC 20CL is a mere 0,3mg and in the standard MMC 20 range,, only 0,5mg. MMC cartridges were manufactured by Bang & Olufsen as totally integrated units. This means that the elements were matched, balanced and sealed at the factory. Using a computer-supported testing programme,, each sealed unit was meticulously tested and it's performance information automatically registered and packed with each cartridge. The information given included output voltage, relative voltage output (channel balance), channel separation and frequency response. Individually-calibrated frequency response curves were also supplied with the higher-specified MMC 20CL cartridges.

Cellule en très bon état avec sa protection et son certificat de calibration.

Bang & Olufsen B&O Beocenter 5000 With MMC20E Stylus. A fantastic Beocenter 5000 complete with MMC20E stylus and finished in Rare White Veneer. It’s in perfect working order and overall excellent condition. The turntable has had a new belt and fully cleaned and serviced. The MMC20E stylus is complete with its original stylus guard. The Perspex lid covering the turntable is in excellent condition and stays up on its own which is rare for a Beocenter. The cassette player has had new belts and rubbers and works perfectly in play, fast forward and rewind. The head has also been cleaned. The aluminium cover over the cassette and functions area works perfectly after having a brand new hinge and grease. The radio works perfectly on every setting and the illuminated display is fully working. The unit has had new rubber feet ,as these always perish and is important to keep the unit level and avoid scratches on your furniture. The Beocenter 5000 has been fully cleaned, tested and serviced and is in excellent condition. Please study the photos as they make up part of the overall description. Thanks Postage will be via courier and will be fully insured and tracked. The price of the postage reflects the weight and value of the Beocenter. Personal delivery will be considered within a certain radius of Wilmslow or a half way meet. Thanks BeoCenter 5000 Manufactured: 1980 - 1982 Designer: Jacob Jensen Colours: Rosewood, Teak, White If space was limited in your home but you still wanted top-class sound reproduction from your hi-fi, Beocenter 5000 was the perfect answer. It offered high-technology performance from radio, records and cassettes, yet measured only 72 x 38 x 9,5cm. Each sound source could compete on merit with more expensive 'separates'. The three high-performance components were integrated together into a single unit to give the best of all possible worlds. The 2 x 40 watts RMS amplifier meant high power with minimal distortion - less than 0,1% at full output. The automatic record deck had a low-mass, low-inertia tone arm carrying an MMC 20E pickup and a precision-built electronic servo drive system for perfect speed accuracy. The cassette recorder was capable of the highest performance levels as it included Dolby Noise Reduction circuits, metal tape facility, automatic ferric/chrome selection, Sendust tape head and 4-digit electronic tape counter. The radio covered Long, Medium and FM bands, with five pre-set stations offering instant, press-button tuning. Beocenter 5000 offered the same musical facilities and powerful 2 x 40 watts RMS output as Beocenter 7002. The two models were identical in the matter of sound quality too, but only the Beocenter 7002 had Bang & Olufsen's very advanced timer-track location and remote control systems. The black anodised lid of its cassette compartment further differentiated Beocenter 5000 from the 7002. BeoCenter 5000 Product Specifications Types: 1802 (1980 - Jan 1983) 1804 (1980 - May 1983) Power output RMS DIN 2 x 40 watts / 4 ohms 2 x 30 watts / 3 ohms Power output 20 - 20,000 Hz 2 x 30 watts / 4 ohms 2 x 25 watts / 8 ohms Harmonic distortion -26 dB < 0.1% Harmonic distortion < 0.1% Intermodulation < 0.3% Frequency range +/- 1.5 dB 20 - 30,000 Hz Tuner: FM range 87.5 - 108 MHz Record player: MMC 20E Stylus elliptical diamond Recommended tracking force 15 mN / 1.5 g Tone arm Radial Antiskating Integrated Stylus pressure range 0-2 g Speeds 33 - 45 rev. / min Wow and flutter, DIN < +/- 0.09% Wow and flutter, WRMS < +/- 0.045% Rumble weighted > 65 dB Rumble unweighted > 45 dB Tape Recorder: Compact cassette C60 - C90 Tape head Sendust Noise reduction Dolby NR Tape switch Auto ferro/chrom, manual metal Wow and flutter < +/- 0.15 % Speed deviation < +/- 1.5% Fast forward and rewind C60 70 sec Power supply: 110 - 130 - 220 - 240 V Power consumption 20 - 250 W Dimensions W x H x D: 72 x 9.5 x 38cm Weight 16.5 kg