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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





Pioneer PD-71


 Pure and simple - Hardly the words you'd expect to describe what may well be one of the world's most technically superior compact disc players.
But while you may find the Elite PD-71 compact disc player's specifications impressive, we think you'll truly appreciate its reason for being.
It's the one compact disc player designed and dedicated to the true music lover. Clearly when your only design criterion is musical excellence, there's no place for compromise.
This single minded devotion to the music purist has yielded a number of refinements in both construction and circuitry of the PD-71. for example, it employs a true 18-bit converter with liner envelope technology to provide the highest accuracy at even the lowest signal levels.

Significant advancements are also evident in the new laser pickup on the PD-71, including a specially designed floating base for cleaner reproduction free signal.
Sonic purity is further enhanced by extensive anti-resonance construction and direct wire connections throughout the unit.
The PD-71 also features defeatable display circuitry, full random play and full remote control. Even the ergonomically designed panel displays and controls are testimony to elegant simplicity.
The Elite PD-71 compact disc player - now nothing can come between you and your music - that the pure and simple truth.
Specifications
Channels:  two channel Stereo
Frequency Response:  2 Hz - 20 kHz (±0,3 dB)
Signal-to-Noise Ratio:  112 dB or more
Dynamic Range:  99 dB or more
Channel Separation:  108 dB or more
Harmonic Distortion:  less than 0,002%
Output Voltage:  2,0 V
Wow and Flutter:  Limit of measurement ±0,001% W.Peak or less
Output Terminals:
Digital Output:
Coaxial Output :  0,5 vp-p (75 Ω)
Optical Output :  -15 dBm to -20 dBm (wavelength 660 nm)
Power Requirements:  AC 120 V, 50 Hz or AC 220 - 240 V, 50/60 Hz
Power Consumption:  21 W
Dimensions (W x H x D):  457 x 127 x 324 mm (18" x 5" x 12-3/4")
Weight:  9,5 kg (20 lb 15 oz)


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