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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





Onkyo DX-7911 (1997)

 Features
Twin-Core AEI (Anti-Electromagnetic Interference) transformer provides clean and abundant power.
Modular chassis construction and optimized layout.
New Linear Motor Actuator for faster access and better pickup precision.
Fine Pulse Conversion System (FPCS) for remarkably natural, warm-sounding digital music.
Proprietary AccuPulse Quartz System, the most advanced single-bit digital-to-analog (D/A) conversion system available.
High-sampling
RI (Remote Intractive) remote control RC-308C


Specifications
CD Player:  Model DX-7911
Signal Readout System:  Optical non-contact
Reading Rotation:  About 500 - 200 rpm (constant linear velocity)
Lineary Velocity:  1,2 - 1,4 m/s
Error Correction System:  Cross Interleave Reed-Solomon code
D/A Converter:  1 bit PWM Accupulse D/A Converter
Sampling Frequency:  352,8 kHz (Eight-times oversampling)
Number of Channels:  2 - stereo
Frequency Response:  2 Hz - 20 kHz
Total Harmonic Distortion:  0,0025%
Dynamic Range:  110dB
Signal-to-Noise Ratio:  110 dB
Channel Separation:  108 dB
Wow and Flutter:  below threshold of measurability
Output level:  2 volts rms
Headphone Jack: 1, optimum load impedance 8 to 200 ohms
Power Consumption:  26 watts
Power Supply:  120 V and 220 -230 V AC, 50/60 Hz
Dimensions (W x H x D):  435 x 131 x 365 mm (17-1/8 x 5-3/16 x 14-3/8 inch)
Weight:  10,5 kg (23,1 lbs)



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