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





Nakamichi Amplifier 2


Nakamichi model, Amplifier 2 follows the same design philosophy as Amplifier 1, with features:
Harmonic Time Alignment circuit topology
Line amplifier stage with discrete components
High current capability
Multi-regulated Power Supply
Isolated ground principle
System Remote capability

Specifications
Power Section
Continuous Average Output Power (both channels driven, 20-20,000 Hz, 0,1%T.H.D.):
50 watts per channel into 8 Ω
80 watts per channel into 4 Ω
Dynamic Output Power:
90 watts per channel into 4 Ω
140 watts per channel into 2 Ω
Power Bandwidth:  10 -50,000 Hz
Frequency Response:  20 -20,000 Hz +0, -0,5 dB (5 - 80,000 Hz +0, -3 dB)
Signal-to-Noise Ratio (A weighted, Input Shorted):  better than 105 dB re rated power  (better than 83 dB , IHF-A 202)
Total Harmonic Distortion (8 Ω , rated power, 20 - 20,000 Hz) :  0,1% or less
Headphone Output (into 40 Ω ):  117 mW
Output Current Capability:  18 A peak per channel
Preamplifier Section
input Sensitivity/Impedance:
Phono MC :  0,125 mv/100 Ω
Phono MM :  2,5 mv/47 k Ω
CD, Tuner, Tape, Aux :  150 mv/20 kohm
Maximum Input Level (1 kHz):
Phono MC :  9 mv
Phono MM :  180 mv
Output Level/Impedance:
Rec Out :  150 mv/1,5 k Ω
Total Harmonic Distortion (1 kHz, Rec. Out, 1 V Output Level):
Phono MC :  0,1% or less
Phono MM :  0,008% or less
RIAA Deviation
Phono MC /MM :  30 - 20,000 Hz ±0,5 dB
Signal-to-Noise Ratio
Phono MC :  70 dB
Phono MM :  82 dB
Tone Controls
Bass :  20 Hz ±10 dB
Treble :  20 kHz ±10 dB
General
Power Source:  120, 230, 240 or 110, 120, 220, 240 V AC , 50/60 Hz
Power Consumption:  370 W max.
Convenience Outlets:  2 x switched, max capacity 150 W (total)
Dimensions (W x H x D):  430 x 125 x 360 mm
Weight:  12,5 kg

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