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

Harman Kardon HD 7400

18-bit linear D/A converter.
Fully discrete analog output section with 12 separate transistors and 6,400 µF of power supply storage.
4 separate power supplies for digital, analog, transport, and display.
3-beam optical laser pickup.
36-Program memory
Rear panel remote control jacks
Audible two-speed cue and review.
Display: track number/ elapsed time/ program number or total number of tracks/ total time/ time remaining.
19-key wireless remote
 18-Bit Technology Withstands the Test of Time
Whether they use Bit Stream or 18-bit digital technology, Harman Kardon compact disc players are distinguished by superior internal layout, quality components, and excellent power-supply and grounding-system design.
Harman Kardon'a 18-bit compact disc players have major advantages over competing brands in the same category. Our units are adjusted in the factory for precise, low level linearity, allowing for clearer, more dynamically accurate, less distorted  low level signals. And as with our bit stream players, we use only discrete circuits along the analog audio signal path.

It isn't every company that applies the same standards to its compact disc players as it does to its amplifiers. Removing the top from ordinary compact disc players reveals that most dedicate only an averange of five percent of internal circuitry to the analog audio section, while Harman Kardon commits 25 to 30 percent, depending on the model. Buyers can literally see the quality of design.
 Discrete Analog Compact Disc Output Stages
Sound signals travel through analog circuitry before arriving at the compact disc player's output jacks. Those stages may employ mass-produced integrated circuits or custom-designed discrete circuits.
Harman Kardon uses only discrete circuits along the audio signal path, insuring that the best possible sound produced by the sampling and conversion systems is achieved.
Discrete circuits embody close-tolerance resistors, capacitors,, and fast-slew-rate transistors. The benefit is wider bandwidth and minimal negative feedback, both of which are critical to the compact disc player's amplifier stages.
System:  Compact Disc Digital Audio
D/A Conventer:  Linear, 18-bit; 4x Oversampling (176,4 kHz)
Signal Detection:  3-beam semiconductor optical laser pickup
Error Correction:  CIRC system
Low level Linearity:  -80 dB (±1 dB)
Frequency Response:  4 Hz - 20 kHz (+0 dB, -1,5 dB)
Total Harmonic Distortion:  0,009%
Dynamic Range:  96 dB
Signal-to-Noise Ratio:  100 dB
Channel Separation:  88 dB
Line Output Level/Impedance:  2,0 V at 10 k Ω
Digital Output Level/Impedance:  none
Power Consumption:  15 watts
Dimensions (W x H x D):  443 x 103 x 328 mm (17-3/8" x 4" x 13")

Weight:  5,0 kg (11 lb)

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