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

NAD 5420

 Compact Disc Player
Balanced MASH One-Bit High Resolution Digital to Analogue Converter:
With CD players utilizing MASH or other one bit technologies, our engineers have found that what really makes the difference in their performance is the care taken in power supply design,, PCB layout, grouding, and selection of analog circuit components
Circuit Simplicity:
Many CD players are "over-designed" with unnecessary stages of analog circuitry that sacrifice transparency and subtle detail. NAD players have just three wide-band analog circuits and only one coupling capacitor in the signal path (bypassed by a low loss film capacitor), thus preserving the emotional detail of the original performance.
Other Features:
Plays 3-inch disc without adaptor
16 tracks programmable
Disc Capacity:  Single disc 120 or 80 mm
Programming Capacity:  16 tracks
D/A Conversion:  MASH, 18-bit resolution 32 times oversampled , linear phase with 18 bit coefficients
Analogue Filter:  5 pole active
Frequency Response:  5 Hz - 20 kHz ( 0/-0,5 dB)
De-emphasis Error:  less than +0,3 dB
Total Harmonic Distortion 0,0025% (at 0 dB , 1 kHz)
Dynamic Range:  98 dB
Linearity:  +0,5 dB; 0 to -90 dB
Signal-to-Noise Ratio (A-weighted, measured with all zeroes test disc):  106 dB
Channel Separation: (1 kHz) :  100 dB
Wow and Flutter:  Unmeasurable (quartz accuracy)
Output Impedance:  120 Ω
Output Level at 0 dB:  2,0 V RMS
Digital Error Correction:  CIRC with double error correction in C1 and C2
Noise at Zero Volume:  less than -120 dB
Power Requirements:  120, 220, 240 V AC 50/60 Hz
Power Consumption:  25 W at 120 V AC
Dimensions (W x H x D):  420 x 84 x 260 mm (16,5" x 3,3" x 10,2")
Weight (Net):  4,1 kg (9 lb 1 oz)

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