Beocenter 4000 Type 2431 marked an evolution from the Beocenter 2200, as it was designed to enhance cassette-based audio experiences. Although it removed the turntable, this model introduced exciting and innovative features that set it apart.
Key Features
Double Cassette Mechanism
One of the most notable aspects of the Beocenter 4000 is, without a doubt, its double cassette mechanism. Specifically, it features two independent cassette decks—one dedicated to recording and the other for playback. This innovative design, in contrast to typical double cassette systems of the time, relies on a common mechanism powered by a single motor. Instead, B&O’s engineering ensured smooth operation and reliability.
Furthermore, the recording deck introduced auto-reverse functionality, which became a standard feature in B&O cassette recorders. Additionally, it included the HX Pro headroom extension circuit, thereby enhancing the recording quality. These advancements made the Beocenter 4000 a pioneer in cassette recording technology.
Legal Context
Despite their popularity, double cassette decks faced legal challenges in the UK during the Beocenter 4000’s launch. To avoid potential issues, B&O prudently included legal disclaimers in their catalogs. Interestingly, the legal concerns surrounding cassette copying often overlooked that earlier models, like the Beocenter 7000, were capable of making near-perfect copies of LPs onto cassette.
Enhanced Functionality
Moreover, the Beocenter 4000 offered various programming and sequencing options, which allowed users to easily copy from one deck to the other, play both sides of a tape automatically, or repeat selections. Both decks supported ferric, chrome, or metal tapes and functioned with Dolby B noise reduction as needed. Additionally, an external microphone could be connected, allowing users to mix its output with other sources during recording.
In terms of other components, the Beocenter 4000 retained many features from the Beocenter 2200, including the same AM/FM tuner with four pre-set FM stations and a 25W amplifier. It also allowed for the connection of additional devices, such as the Beogram 3000 and a compact disc player, which further enhanced versatility.
Conclusion
In summary, the Beocenter 4000 excelled as a cassette deck, showcasing advanced features and impressive sound quality. However, it fell short as a complete music system due to its modest amplifier and loudspeakers, which included the Beovox X 25s. Nevertheless, the Beocenter 4000 remains significant as B&O’s introduction to auto-reverse technology and its only double tape deck model.
Type Numbers
2431 (1985 – May 1988)
2435 (AUS) (1985 – Jan 1986)
2439 (D) (1985 – Sept 1987)
2432 (GB) (1985 – Nov 1987)
Designer: David Lewis
Manufactured: 1985 – 1988
Color Options: Black/Aluminium
Amplifier Specifications
Power Output (RMS DIN/IEC):
• 2 x 25 watts at 4 ohms
• 2 x 20 watts at 8 ohms
Harmonic Distortion: < 0.2%
Intermodulation Distortion: < 0.4%
Frequency Range: 20 – 20,000 Hz ± 1.5 dB
Signal-to-Noise Ratio: > 78 dB
Channel Separation at 1000 kHz: > 50 dB
BeoCenter Product Specifications
Tuner Specifications
FM Frequency Range: 87.5 – 108 MHz
LW Frequency Range: 147 – 350 kHz
MW Frequency Range: 520 – 1610 kHz
Cassette Deck Specifications
Compatible Tapes: C60 – C90
Wow and Flutter: < +/- 0.15%
Speed Deviation: < +/- 1.5%
Fast Forward/Rewind Time: 80 seconds
Frequency Range (Chrome): 30 – 15,000 Hz
Signal-to-Noise Ratio (Chrome): > 58 dB
Dolby NR (Chrome): > 66 dB
Power Supply and Dimensions
Power Supply Options
Voltage: 110 – 130 – 220 – 240 V
Power Consumption: 20 – 200 W
Dimensions
Dimensions (W x H x D): 65.5 x 8.5 x 31 cm
Weight: 15 kg
Connections
Extra Tape Recorder: DIN
Gramophone: DIN
Headphone Jack
Beocenter 4000 Type 2431 service manual can be downloaded here for free.
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