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What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.



H.H. Scott '59





B&O Beogram 3404

Bang & Olufsen Beogram 3404
Meet the Beogram 3404, an intelligent, thoughtful an dvery well spoken turntable.
Like all Bang & Olufsen turntables, the 3404 effectively combines superior sound reproduction  with simplified - not complicated - operation. That's the real beauty of the 3404. that's why the controls are outside of the dust cover where they're easily accessible.
And that's why just a light touch of the Start button does everything. It determines if a record is on the platter, and if so, quickly sets the correct speed and lowers the stylus to the record.
Slam. Pound the shelf next to the 3404. not a skip, not a jump; thanks to the rock-steady patendted suspension system. Audible acoustic feedback disappears as a result.
A low inertia tonearm with a knife-edge bearing system eliminates audible distortion.
The Bang & Olufsen MMC cartridge works in flawless harmony with the tonearm. The unique self-correcting electronic servo-drive is so precise that the need for a conventional strobe device is eliminated.
 the Beogram 3404 even responds to remote control commands when used with the beomaster 2400 receiver.
Specifications
Speeds:  33-1/3 and 45 rpm
Speed Control range:  better than ±3%
Wow and Flutter:  less than ±0.06%
Rumble Weighted:  better than 65 dB
Rumble Unweighted Better than 45 dB
Drive System:  Flat belt
Motor:  Servo controlled DC
Pick-up Section MMC20E
Recommended Tracking Force:  15 mN/1,5g
Frequency Range:  20 -20,000 Hz ±2,5 dB
Channel Separation: better than 20 dB (1000 Hz)
Channel Difference:  less than 2 dB
Stylus:  Elliptical diamond
ETM: 0,5 mg
Radius of Curvature:  5 x 17 µm
Compliance:  20 µm/mN
Sensitivity:  better than 0,6 mV/47 k Ω
Output (5 cm lateral RMS):  better than 2,12 mV/47 k Ω
Power Supply: 110 or 220 V  50/60 Hz
Power Consumption:  8 W
Dimensions (WxHxD):  440 x 85 x 370 mm
Weight:  6,5 kg
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