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

Technics SE-9021 (1978)

Stereo Power Amplifier TECHNICS SE-9021

General specifications

System: Transistor Power Amplifier

Speaker Outputs: 4 Speakers, Phones

Effective output: 60 Watts per channel at 8 ohms

Frequency Response: 0 - 150.000 Hz +0 -3 dB, 20 - 20,000 Hz +0 -1 dB

Harmonic Distortion: 0,01 % at rated output

Cross Modulation Distortion: 0,01%

S/N Ratio: 115 dB (IHF-A)

Imput sensitivity/ impedance: 1V/ 47 kohm

Dumping Factor: 100 (at 8 ohms)

Load impedance: 4 - 16 ohms

Physical specifications

Power source: AC100 V, 50/60Hz

Power consumption: 140 W

Dimensions (W x H x D): 430 x 97 x 331 mm

Weight : 9,7 Kg

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