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

Sony PS-X70 turntable

Consider the Sony Audio PS-X70 turntable. Think of it as a professional transcription turntable, for home use. At a price your audio conscious home can afford.
Think about two discrete servo-controlled motors. One for the platter, another for the tonearm.
And while you're thinking about Sony's hesitation-free BSL motor. No brushes. No slot. And absolutely no cogging. Just even, iniform rotation. Hour after hour. Year after year.
Our own quartz-locked magnedisc servo control system makes Sony direct-drive turntables immune to voltage fluctuations. It takes servo control to a new level of accuracy, by measuring turntable speed at the outer rim of the platter - not at the motor.
There's more you sholuld know; front-mounted feather-touch controls, electro-magnetic braking, special four-clamp head-shell connector, even resonance-free SBMC cabinet with flui-filled feet to eliminate acoustic feedback.

But perhaps the most amazing thing about our PS-X70 is that it's not alone.
It's just the top of our line. A whole line of new Sony Audio turntables, most of which have most of the features we've listed here.
And every one is designed as a system. With electronic, megnetic, and mechanical technologies contributing to a balanced level of audio performance no single innovation could achieve. We know about turntable innovation. We paractically wrote the book. Direct drive, servo control,Quartz lock, carbon fiber tonearm, Sony gave you then all. Long before almost anyone knew they existed. But we also know that innovation alone can't make a great audio component. Sound makes a great audio component.

Platter:  320 mm (12-5/8") aluminumalloy diecast
Motor:  DC servo-controlled linear BSL motor
Drive System:  Direct-drive, crystal lock control system
Speed:  33-1/3 and 45 rpm
Speed Control Range:  ±10% (crystal lock off)
Starting Characteristics:  comes to nominal speed within a 1/4 revolution (33-1/3 rpm)
Wow and Flutter:  ±0,045% DIN; 0,025% WRMS
Signal-to-Noise Ratio:  75 dB (DIN B)
Initial Drift:  within 0,0003%
Load Characteristics:  0% up to 230 g tracking force
Automatic System:  lead-in, return, reject, repeat
Type:  Statically balanced Universal
Pivot-to-Stylus Length:  235 mm (9-1/4")
Overall Arm length:  330 mm (13 ")
Overhang:  14 mm (9/16")
Tracking Error:  +2°27',  -1°30'
Tracking Force
Adjustment Range:  0 -2,5 g
Shell Weight:  11 g
Cartridge Weight Range:  11,0 - 19,5 g
Including Shell :  19,0 - 27,5 g (with wxtra weight)
Power requirements:  220, 240 AC adjustable 50/60 Hz ; 120 V Ac 60 Hz
Power Consumption:  16 W
Dimensions (W x H x D):  480 x 165 x 420 (18-15/16" x 6-1/2" x 16-9/16")
Weight:  13 kg (28 lb 11 oz) net

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