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Die eindringliche Wissenschaft, die in Audiogeräten steckt – präsentiert von {name}

Ariel Cabello

The most distinctive feature of the BeoLab 9’s design was the “acoustic lens” that surrounded the upward facing tweeter. The action of the acoustic lens is explained in the description of the BeoLab 5 and the same principles, though on a smaller scale, were applied to the design of the BeoLab 9.

The BeoLab 9 used 3 drive units, described as a 10” woofer, a 5” midrange and a 0.75” dome tweeter. This made for a nominally 3-way loudspeaker, though given the sizes of the drive units and their crossover points the effect was more akin to a small 2-way loudspeaker working in conjunction with a well-matched subwoofer. This setup can be contrasted with the earlier Uniphase models (e.g. the Beovox S 80.2) to see how the design parameters had changed.

As 3-way active design the BeoLab 9 required three separate power amplifiers. B&O demonstrated their ability to for a rational solution from the available technologies by selecting a class-D amplifier (ICE Power to give it its marketing name) for the woofer and two conventional linear class AB amplifiers for the midrange and treble. This was an inspired choice, the bass amplifier could be made very powerful (500W) without having to make the cabinet too big or the heat sinks too obtrusive and the heavy, and the well damped bass driver was largely insensitive to the types of distortion it generated. Meanwhile, the sensitive midrange and tweeter loudspeakers, which at 100W each needed much less power, were fed with a pure signal which only a proper linear amplifier can provide. A hybrid based design was chosen, using a single package whose two channels would normally have been used for left and right in a conventional amplifier. This arrangement was common to many loudspeakers in the BeoLab range.

An electronic switch mode power supply was used instead of a conventional mains transformer, bringing with it the advantages of high power density, low cost, light weight and the elimination of the need to adjust the line voltage for different markets. The last item was the only one of technical merit, although one can see how the other attributes would be attractive to the manufacturer.

B&O were clearly conscious of the poor reliability record of their earlier active loudspeaker models when designing the BeoLab 9. Elaborate protection systems were built in that protected the loudspeaker units against both overdriving and overheating. This was clearly wise given the BeoLab 9’s potential power output.

Connections to the audio system were made by Powerlink cables. Older or non-B&O equipment could be made using special cables terminated in a variety of standard type plugs. A switch on the loudspeakers set the input to “line” mode to allow these cables to operate correctly. The traditional “free/wall/corner” equalising switch was also present. The BeoLab 9 lacked the complex digital input, digital signal processing and automatic calibration functions of the BeoLab 5 but then it was also considerably cheaper. High quality was assured as the available resources were directed towards the essential parts of an active loudspeaker rather than clever gimmicks that were unlikely to be used much.

Well-designed, well-thought-out and well-made, the BeoLab 9 really did deserve success.
Truly excellent speakers, a high-quality speaker set. High-end level. Class D ICE POWER AMPLIFIER.

To really enjoy music at home, every tone from the deepest bass tone to the highest musical note are reproduced very clearly by these speakers. Wherever you are sitting or standing. Only then can music move you to tears or make you burst out laughing. The true music lover will recognise its sublime quality from the first note onwards.

Due to the Acoustic Lens Technology, you will not miss a note. The sound is of the same quality throughout the room, whatever you are doing, wherever you are.
The acoustic lens is mounted on seat height so you can embrace the music. The Acoustic Lens Technology ensures sound waves spread evenly.

Built-in amplifiers and subwoofer.

The speaker can be connected to all Bang & Olufsen BeoSound BeoMaster BeoVision audio, vision and link systems, and also to non-B&O systems.
It can be used via line to wirelessly stream via Bluetooth or Wi-Fi internet from tablet of phone.
It can also be connected to all TVs for a sublime sound experience.


ICE POWER class D amplifiers 700 watts per speaker.


SPECIFICATIONS:

Power consumption
65W (IEC60065)
25W typical
< 0.4W in standby
Power amplifier, bass
500W, class D ICEpower
Power amplifier, midrange
100W, class AB
Power amplifier, treble
100W, class AB
Long-term maximum output power per amplifier
Bass: 400W/4ohm
Midrange: 100W/6ohm
Tweeter: 100W/8ohm
Effective frequency range
28-29,000 Hz
Crossover frequency
180/2000 Hz
Cabinet principle
Closed box.
Net volume, bass
18 litres
Net volume, midrange
4 litres

Thermal protection of all drivers.
ABL system protects the bass unit against mechanical damage.
Power supply
Automatic voltage adaptation 100-120Vac or 190-240Vac



Sehr gut - Anzahl der Objekte: 2 - Inklusive: Aktiv-Lautsprecherset - Netzkabel

Bang & Olufsen - Leistungsstarke Beolab 9 Aktivlautsprecher Aktiv-Lautsprecherset

Audio-Equipment

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13 April

morgen

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Spulentonbandgerät, 18 cm

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Europa

Unbekannt

Material

Aluminium

Plastik

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Zustand

Hervorragend

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Neuwertig

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Excellent (EX)

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Zustand: verschiedene

Mint (M)

Passabel & schlecht

Guter Zustand - gebraucht mit geringen Alterungsanzeichen

Wie neu - unbenutzt

Guter Zustand - gebraucht, mit geringfügigen Altersspuren & Mängeln

Nahezu neuwertig

Mäßiger Zustand - stark gebraucht & mit möglicherweise fehlenden kleineren Teilen

Zubehör

Keine Extras

Netzkabel

Fernbedienung

+ zusätzliches Objekt (siehe Beschreibung)

Verpackung

Originales Benutzerhandbuch

Stromversorgung

Überholt

Netzteil

Etui

Broschüren

Keine Kabel

Bordcase

Gatefold

Mikrofon-Stoßsicherung

Ausgepackt

Periode

2010–2020

2000-2010

2020 und ff.

1940-1950

1980-1990

1990-2000

1920-1930

Stil

Vintage

Italienisches Design

Zeitgenössisch

Genre

Blues

Farbe

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Weiß

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Getestet und funktionstüchtig

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Plattenfirma

Unknown label

Original/Nachbau

Reproduktion/Nachbildung

Epoche

1900-2000

Nach 2000

1400-1900

Schöpfer

Japan & Related

Luigi Caccia Dominioni

Marco Zanuso

Franco Albini

Mario Bellini

Livio Castiglioni

Pier Giacomo Castiglioni

Achille Castiglioni

Richard Sapper

Gut - Anzahl der Objekte: 1 - Inklusive: Mehrkanal-Festkörper-Receiver - Netzkabel

Denon - AVR-1311 Mehrkanal-Festkörper-Receiver

Hervorragend - Anzahl der Objekte: 1 - Inklusive: Verpackung

Philips - Philips GP412 ‘Super M’ – High-End Element met Originele Philips VE Naald Kartusche und/oder Nadeln

Hervorragend - Anzahl der Objekte: 2 - Inklusive: Lautsprecherset - Keine Extras

Polk - T50 Lautsprecherset

Sehr gut - Anzahl der Objekte: 3 - Inklusive: Keine Extras

Spirit of St Louis - Novelty Radio's - Transitorradio's Radio - Diverse modellen

Gut - Anzahl der Objekte: 2 - Inklusive: Lautsprecher - Keine Extras

Kef - iQ1 Lautsprecher

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Behringer - DX1000 PRO Mixer Analoges Mischpult

Sehr gut - Anzahl der Objekte: 2 - Inklusive: Audio-Komponente - Keine Extras

Generic - NAB Aluminium-Radnabenadapter Audio-Komponente

Audio-Equipment

Dieses Objekt ist leider nicht mehr verfügbar, aber es gibt noch viel zu entdecken

Bang & Olufsen - Leistungsstarke Beolab 9 Aktivlautsprecher Aktiv-Lautsprecherset

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