BEO.ZONE

BeoCenter 4000 (1985)

BeoCenter

Production: 1985 - 05/1988

Designer: David Lewis

Documents: Owners Manual, Schematic

Beocenter 4000 was one of a trio: its siblings Beocenter 2200 and Beocenter 2100 were similar in looks externally, but with the exception that they were kitted out differently internally. Bang & Olufsen’s philosophy at this time - especially when it came to the Japanese who were able to mass-produce their relatively good quality products at knock-down prices - was to offer something for everyone. Beocenter 4000 therefore looked the same on the outside with the lid down, but within it was fitted with two cassette decks: one for playback and the other for recording and for playing back. A first for Beocenter 4000’s cassette decks was that it had auto-reverse incorporated, which meant that at the time of one cassette side finishing, the player played the same tape but in reverse, allowing the other side of the tape to be heard. Moreover, HX-Pro and Dolby B NR circuitry was fitted too, making Beocenter 4000 an excellent cassette tape all-rounder.

Both of the cassette units could use the whole range of tape types that were available at that time: ferrix oxide, Chrom Dioxide and Metal. And the microphone-in socket allowed for the mixing of spoken voice and music, if that was your forté.

The amplifier had a medium-powered 2 x 25W but with the provided Beovox X25 speakers lacked the quality that Bang & Olufsen is known for.  However, at the same time the music centre was both affordable and looked good, and was an excellent first venture into the world of Bang & Olufsen for a first-time purchaser who did not expect too much.

Stand SM40 was available for displaying the Beocenter 4000 as well as the Beocenter 2100 and 2200.

BeoCenter 4000 (1985) technical specifications

Types:
2431 (1985 - May 1988)
AUS 2435 (1985 - Jan 1986)
D 2439 (1985 - Sept 1987)
GB 2432 (1985 - Nov 1987)

Amplifier:
Power output RMS DIN/IEC 2 x 25 watts / 4 ohms
2 x 20 watts / 8 ohms
Harmonic distortion < 0.2 %
Intermodulation < 0.4 %
Frequency range 1.5 dB 20 - 20,000 Hz
Signal-to-noise ratio > 78 dB
Channel separation 1000 kHz > 50 dB

Tuner:
FM frequency range 87.5 - 108 MHz
LW frequency range 147 - 350 kHz
MW frequency range 520 - 1610 kHz

Tape deck:
Compact cassette C46 - C60 - C90 - C120
Wow and flutter < +/- 0.2 %
Freuqency range 30 - 15,000 Hz
Signal-to-noise ratio CCIR/ARM
Metal Dolby NR > 67 dB TDK-MA
Chrome Dolby NR > 65 dB TDK-SA
Ferro Dolby NR > 63 dB BASF LH I
Metal > 59 dB
Chrome > 57 dB

Power supply:
2431: 220 V
2432: 240 V
2435: 240 V
2439: 220 V
Power consumption 25 - 140 W
Dimensions W x H x D: 64 x 9.5 x 33cm
Weight 10 kg

Connections: CD Phono plugs
Phono Phono plugs
AUX Phono plugs