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BeoMaster 4400

Beomaster 4400 was an advanced high-fidelity FM receiver which represented significant refinements in the design of domestic sound equipment. It incorporated a number of technical innovations and highly creative circuit designs which would not be out of place in a professional unit. In terms of technical finesse and power output, Beomaster 4400 was Bang & Olufsen’s top of the line stereo receiver in 1979 – 80.

The amplifier’s rated output of 75 watts RMS per channel (into 4 ohm speakers) provided more than enough power even in large rooms. There were DIN sockets for connecting a record-player, two tape or cassette recorders (one socket allowed monitoring), headphones and two pairs of stereo speakers. One pair of speaker outputs could be switched to ambiophonic use. In addition to the more usual controls and adjustment facilities, Beomaster 4400 had switchable high and low filters, a loudness control for physiologically compensated output at low volume settings and a linear function which caused the signal to by-pass all tone and filter circuits for truly unadulterated output. An overload indicator was provided to show when the amplifier’s limit for undistorted sound had been reached. Transient Intermodulation Distortion (also called transistor sound) was reduced substantially thanks to carefully designed circuits upon special research at Bang & Olufsen.

Receivers and amplifiers with the ambio function were products which, apart from stereo, could also reproduce the ambience or sound information of a room. Ambient information was included on most stereo vinyl recordings but could not be reproduced by a sound system with two loudspeakers or an ordinary stereo amplifier. Bang & Olufsen systems with the ambio function had facilities which electronically subtracted the difference signal (i.e. the difference between left and right channels) which contained ambient information. This information was fed into two extra loudspeakers which were placed as side speakers in a room. Ambiophony was an extension of stereo reproduction and enhanced the sense of realism. It could be used with nearly all stereo programme materials

The tuner was extremely sensitive and had low distortion levels over the entire FM waveband. Naturally, it incorporated all the latest technical and scientific advances such as a symmetrical Quadrature detector with the Phase Locked Loop stereo decoder which guaranteed low distortion and long-term channel separation on FM stereo programmes. The AFC (Automatic Frequency Control) circuit had characteristics which reduced inter-station noise during tuning. This circuit was also triggered automatically to eliminate loud ‘switch’ noise when changing between radio, record or tape programmes. There were six small dials for pre-tuning FM radio stations, so subsequent programme selection was just a matter of pressing a switch.

Beomaster 4400 could be made up as part of the Beosystem 4400, when linked together with other compatible Bang & Olufsen products.

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BeoVision 8800

BeoVision 8800

Beovision 8800 marked a brand-new generation of televisions with significant technical improvements. One of the most important enhancements was probably the remote control, which now worked with infrared light instead of ultrasound, and had practically all the same functions we use today. Thus, it could also operate text-TV, a brand-new service offered to viewers, introduced in 1983. The remote control took on something of a cult status. Being cast in zinc, the remote control was much more pleasant to handle; as zinc conducts heat, you didn’t get clammy hands from handling it for an extended period.

Beovision 8800 had remarkable sound compared to other televisions. The engineers had managed to incorporate a built-in two-way loudspeaker system driven by a 14W amplifier. The energy consumption was only 75W, which is in fact on a par with today’s standards. But, back then, a television used more energy if you turned up the volume or increased the picture contrast. These factors are no longer very significant.

This system concept was new. It was now possible to use the same remote control for both the TV and the video recorder. Bang & Olufsen blazed new trails by fusing two remote control units into one. The technology should exist for the sake of people – not the other way around. This philosophy has been pervasive from the very beginning. And it is refreshed at regular intervals. For example, quoting a sales brochure from the 1970s asserts: “There is something that distinguishes Bang & Olufsen radically from everybody else. We are just as interested in what our products are used for as we are in their technological capabilities.

To us, coming up with a technically satisfying design is not enough. It also needs to be satisfying to use. It should operate intuitively. Knobs, buttons and dials need to be positioned logically and consistently so they can be understood and operated by children and adults alike. This might make people think the technology is less advanced. Nothing could be further from the truth. On the contrary, well-thought-out operation makes heavy demands on ingenuity, often requiring unconventional, sometimes radical solutions.

The objection is frequently heard that people quickly become accustomed to operating technical equipment even if it is complicated and illogical. We do not believe that this is necessarily so. In fact, people often find complicated things annoying – and give up trying to make sense of each of the functions they have paid for. There is simply no excuse for not thinking through the functions and their operation. Even when we’re talking about the most advanced high-fidelity equipment, the technology is there for the sake of the people – and not the other way around.”

Beovision 8800 became a classic, remaining in production until the launch of the Beovision LX family.

(Taken from Beolink Magazine: ‘The First 50 Years of Television’ © Bang & Olufsen a/s 2002)

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BeoVision 7700

BeoVision 7700

Beovision 7700 was a 22″ colour TV with remote control of up to 16 stations. You could also adjust brightness, colour and sound levels – and switch the TV off – without moving from your chair.

True high fidelity sound was a natural accompaniment to the excellent video performance of this set, thanks to a 14 watts sound amplifier and log-line dual speaker system. There were also sockets for connecting optional headphones and an extension loudspeaker, and an additional connection for recording the TV sound on a cassette deck or feeding it through your hi-fi system.

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BeoVision 6002

BeoVision 6002

Beovision 6002 was a luxurious colour TV receiver with a 66cm (viewable) screen and cordless, ultrasonic remote control. The slim remote control module allowed you to select up to eight TV programmes, adjust volume, brightness and colour strength from the correct viewing and listening position. You could also switch the set off without moving away from your armchair. The ‘recall’ facility provided a digital on-screen display indicating the channel currently being viewed. The reset function automatically returned volume, colour and brightness to pre-set levels.

Picture quality was outstanding, with sharp, bright, precise image definition and natural colours. The automatic cut-off circuit monitored the balance of colours fifty times a second, guaranteeing long-term colour truth.

Sound reproduction was of hi-fi quality because Beovision 6002 was fitted with a 6,5 watts RMS amplifier which had a wide frequency range and less than 0,8% harmonic distortion. The loudspeaker was of a pressure-chamber construction as used in many hi-fi audio systems. There were separate controls for bass and treble and sockets for connecting headphones and additional speakers. The receiver could also be equipped with a module for Teletext reception and video cassette programmes could be reproduced without additional technical adjustment.

Beovision 6002’s genuine wood-finished cabinet had a unique tambour screen door for protecting the screen when the set was not in use. The self-styled wooden undercarriage with smooth-running castors was both practical and elegant.

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BeoVision 601

BeoVision 601

The Beovision 601 was visually very similar to the Beovision 600, but it used a mildly redesigned chassis. The changes centred mostly around the receiver section, which made greater use of integrated circuits that the previous model had done.

The Beovision 601 was the last true Bang & Olufsen portable television, in as much as it was designed and produced by them in Denmark. It would be the late 1980’s before another portable model would appear, which was the disappointing MX 1500, a Philips set made in a Philips factory in Italy.

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BeoVision 5500

BeoVision 5500

Beovision 5500 had a 50cm High Bright tube with automatic contrast regulation, so the picture always looked bright and clear, with true-to-life colour even in daylight viewing.

Quality was not compromised simply because it was physically a small set. Picture and sound reproduction used the same high technology as that featured on the 26″ Beovision 8800. The remote control system wa also identical, with up to 16 channels available for instant selection.

Beovision 5500 – like the other Beovisions in this family – was exceptionally cool running, with maximum power consumption under 75 watts – less than an ordinary light bulb! Because less heat was generated inside the set, vital components were exposed to less physical stress and therefore had a longer working life. High reliability was, and still is, an important factor when choosing a new TV.

If remote control or access to Teletext was not required, then Beovision 5000 was a suitable alternative offering manual selection of up to 12 stations. The rest of the facilities offered by this television set were the same as its more luxurious brother, the Beovision 5500.

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BeoVision 5000

BeoVision 5000

Beovision 5500 had a 50cm High Bright tube with automatic contrast regulation, so the picture always looked bright and clear, with true-to-life colour even in daylight viewing. Quality was not compromised simply because it was physically a small set. Picture and sound reproduction used the same high technology as that featured on the 26″ Beovision 8800. The remote control system wa also identical, with up to 16 channels available for instant selection.

Beovision 5500 – like the other Beovisions in this family – was exceptionally cool running, with maximum power consumption under 75 watts – less than an ordinary light bulb! Because less heat was generated inside the set, vital components were exposed to less physical stress and therefore had a longer working life. High reliability was, and still is, an important factor when choosing a new TV.

If remote control or access to Teletext was not required, then Beovision 5000 was a suitable alternative offering manual selection of up to 12 stations. The rest of the facilities offered by this television set were the same as its more luxurious brother, the Beovision 5500.

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BeoVision 4002

BeoVision 4002

Beovision 4002 and 4402 were colour receivers with 26″ screens. Natural colours, sharp, precise image definition and high-fidelity sound reproduction are all features you can take for granted, according to the 1970 – 80 Bang & Olufsen product catalogue. Their high reliability levels were due to modular construction techniques and low heat-generation. Beovision 4002 consumed only 110 watts – less than a black and white set of years previously.

Both sets were extremely easy to use. There were facilities for presetting up to eight stations so that subsequent programme selection was just a matter of pressing one button. This turned the set on at the same time.

Beovision 4402 had the additional convenience of a cordless (ultrasonic) remote control. The set could also be supplied equipped for Teletext reception. There was automatic synchronisation of VCR programmes on all channels.