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

Technics SL-PS70

 The Technics SL-PS70 with its D/A converter section including MASH 1-bit DAC (multi-stage noise shaping), was able to perform distortion-free reproduction of low-level signals, as well as micro-signals embedded in large signals. The unit used a multi-layer vibration-resistant construction and centre mechanism, which thoroughly eliminated vibration and resonance, as well as four large insulators that reduced vibration from the floor. The line Out circuits included Technics' unique Class AA circuitry.  Also, the power supply circuitry was structured with the audio circuitry specifically independent from the transformer coils. In addition, for comprehensive operation convenience, functionality included CD editing with normal time edit and just time edit selectable, and time fade enabling automatic fadeout.

MASH - Multi-Stage Noise Shaping, is an effective oversampling D/A conversion technique which realizes a high Signal-to-Noise ratio and needs no highly complex manufacturing processes such as a laser trimming. MASH is a trademark of NTT.
Audio Section
Number of Channels:  two, stereo
Frequency Response:  2 - 20,000 Hz ±0,3 dB
Output Voltage:  2 V (at 0 dB0
Dynamic Range:  96 dB
Signal-to-Noise Ratio:  112 dB
Total Harmonic Distortion :   0,003% 91 kHz, 0 dB)
Wow and Flutter:  below measurable limit
D/A Converter:  MASH (8 DAC)
Output Impedance:  approx 1 k Ω
Load Impedance:  more than 10 k Ω
Headphone Output level:  15 mW max. 32 Ω (adjustable)
Pickup Wavelenght:  780 nm
Power Supply:  110 - 127 V; 220 - 240 V, AC 50/60 Hz
Power Consumption:  11 W
Dimensiond (W x H x D):  430 x 126,5 x 332,5 mm
Weight:  5,2 kg

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