The Beomaster 4000 was an important and successful model for B&O. It was the first of a new generation of receivers that used the best quality hi-fi components combined with the easy use of a normal radio. Still looks neat and works correctly Can program 6 preselect channels. Stereo and mono. Up to 4 speakers can be used. DIN as RCA connectors to connect almost everything on a diversified and reliable B&O receiver - amplifier. An early design by Jacob Jensen - a top design that remains as a top design until the day of today. BeoMaster 4000 Specifications Types: 2406, US 2408 (1972 - April 1977) Power output 2 x 60 watts/ 8 ohms 2 x 40 W / 4 ohms 2 x 100 W / 8 ohms 2 x 55 W / 4 ohms Speaker Impedance 4 ohms Harmonic Distortion < 0.06 % Intermodulation < 0.3 % Frequency Response 20 - 30000 Hz Signal-to-noise ratio > 58 dB Channel Separation > 45 dB Bass control: +/- 17 dB Treble control +/- 14 dB FM tuner: Range 87.5 - 104 MHz Power supply:110 - 130 - 220 - 240 V, 50 - 60 Hz Power Consumption: 20 - 275 W Dimensions W x H x D: 9.5 x 58 x 27cm Weight: 10 kg RIAA amplifier: built-in Connections: Tape 1 DIN Tape 2 DIN Phono DIN Speakers 2 sets.