SANSUI SR-525

 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:  33⅓, 45 rpm

Fine Speed Adjustment:  ±3,5% (separate knobs 33⅓ 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

Accessories: 

45 rpm record spindle adaptor,

Low capacitance - 40 pF/m- output signal cable,

Cartridge mounting gauge