Production: 1972 - 05/1977
Designer: Jacob Jensen
Made up from other products within the Bang & Olufsen range, Beocenter 3500 was comprised of Beogram 3000 and Beomaster 3000. With six pre-set stations in the top-quality radio section, the amplifier delivered a good 2 x 40W per channel, unusual for a combined stereo system such as this. An illuminated tuning indicator and a signal-strength meter assisted with the tuning in of distant radio stations.
A comprehensive range of connection facilities were also included. There were facilities for two pairs of loudspeakers, headphones and a tape recorder with monitoring. The record-player was fully automatic with one master-control for operating all functions. The user had just to select the size of disc to be played and the rest was done for you. An SP 10A pickup was fitted as standard.
The system could be expanded with a tape recorder, such as the Beocord 1800 reel-to-reel deck. There was also the facility for another record deck to be connected if desired. Although Beovox 3800 loudspeakers were recommended, almost any of the speakers in the B&O range could be used.
A replacement for Beocenter 3500 came with Beocenter 7000 in 1980.
2401 (1972 - March 1977)
US 2409 (1972 - May 1977)
2 x 40 watts RMS
2 x 75 watts music power
Speaker impedance 4 ohms
Distortion Less than 0.6% at 1000 Hz and 40 watts of power output on both channels simultaneously
Intermodulation Less than 0.6% at rated output, measured at 250 and 8000 Hz at amplitude ratio of 4:1 (DIN 45.403/3)
Channel separation Better than 45 dB at 1000 Hz and better than 30 dB between 250 Hz and 10,000 Hz. DIN 45 500/6. 2. 4. 1
Input separation Better than 60 dB at 1000 Hz and better than 45 dB between 250 Hz and 10,000 Hz. DIN 45 500/6
Bass control range +/- 17 dB at 50 Hz
Treble control range +/- 14 dB at 10,000 Hz
Balance control range Min 60 dB
Tuning range 87.5 - 104 MHz
Speeds 33 1/3 and 45 rpm
Rumble Better than 60 dB (DIN B)
Wow and flutter Better than +/- 0.15 % peak value (DIN), corresponding to +/- 0.06 % RMS Pickup: Pickup SP 10 A
Stylus pressure 1.2 g (pond)
Power consumption 20 - 200 Hz
Dimensions H x W x D: 14.5 x 58 x 35cm
Weight 18 kg
Connections: Headphone Jack, tape DIN, extra record player DIN