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


 Sansui Direct Drive Electronic Transcription Turntable SR525

Sansui engineeres and designers working on the SR-525 made no claims or promises until they were sure of thier results. They knew they were on the trail of a significant breakthrough in turntable execellence. And they were right. Now that the new direct-drive SR-525 is ready for marketing, thier secrets can be revealed: One, they have refined the rotor position sensor mechanism in combination with a 20-pole, 30-slot brushless DC servomotorwith a saturable core to perfect the most accurate, most silently running direct-drive system the industry has ever seen.
Two, they have lowered wow and flutter to a negligible 0.03% and boosted S/N toa high 64dB with the use of mirror-finishedspindle and sleeve combination. Three, they have used the finest Sansui S-shaped tonearm, incorporation a special resonance-absorber (Pat. pend.) for it tototally eliminate resonance and used a knife-edge support system to ensure the lowest friction performance they've ever achieved. 
And finally, the SR-525 is equipped with a solid, die-cast aluminium headshell, a stroboscopic pitch control system, electronic speed-change controls and a number of other advanced features to further guarantee maximum performance exceellence and ease of operation.

 The biggest secret of the direct-drive SR-525 is how Sansui has held its price to and even below the level of comparable belt-drive models.  And that's one secret they're not sharing.

 Specifications SR-525
Type:  manual single record playing transcription turntable
Motor:  20 pole, 30 slot DC brushless type
Drive:  Direct spindle derive, electronic ally servo-controlled
Platter:  310 mm (12-1/4") aluminum die-cast weighing 1,4 kg (3,1 lbs)
Wow and Flutte:  less than 0,03% (WRMS)
Signal-to-Noise Ratio:  better than 64 dB (IEC-B)
Rumble:  better than -72 dB (DIN-B)
Recoed Speeds:  33, 45 rpm
Fine Speed Adjustment:  ±3,5% (separate knobs 33 and 45 rpm)
Speed Control:  Illuminated stroboscope with marking on he platter periphery
Tonearm:  Statically-balanced S-shaped resonance-free tonearm with knife-edge support, adjustable height
Length:  220 mm (8-11/16") pivot to stylus tip
Overhang:  17,5 mm (3/4")
Friction (10 mm deflection):
20 miligrams vertical
100 miligrams horizontal
Minimum Tracking Force Setting:  0,5 grams
Acceptable Cartridge Weight:  4 - 11 grams
Compensation:  Bias and Lateral Balance
Cueing:  Separate lever at arm base
Cartridge:  SV-27A (for SR-525 sold outsaide the USA, Europe, Canada)
Type:  Moving Magnet
Frequency Response:  10 - 23,000 Hz
Channel Separation:  25 dB (1 kHz)
Output Voltage: 3,5 mV per channel (1 kHz 50mm/sec.)
Optimum Load:  47,000 ohms
Tracking Force:  1,5 - 2,0 grams
Stylus:  SN-27 0,5 mil diamond spherical
Cabinetry:  40 mm thick chip-board base with anti-howling insulators and hinged free-stop tinted cover
Power Requirements:  100 - 120 / 220 - 240 V, 50/60 Hz
Power Consumption:  5 watts
Dimensions (W x H x D):  469 x 150 x 375 mm (18-1/2 x 5-15/16 x 14-13/16 inch)
Weight:  9,5 kg (20,9 lbs) net
45 rpm record spindle adaptor,
Low capacitance - 40 pF/m- output signal cable,
Cartridge mounting gauge

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