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

Pioneer SG-90

 Pioneer SG-90 
17-band Graphic Equalizer

-octave 17-band equalizer for true versatility -
Provides 17 controls per channel covering a range from 16 Hz to 25 kHz
Low distortion -
(0,001%, from 20 to 20,000 Hz, all controls flat), and a high signal-to-noise ratio (120 dB)
Auto fader -
Helps you create your own tapes with smooth fade-ins and fade-outs between songs
Adjustable control level -
± 12 dB for normal use, ± 6 dB for delicate critical adjustments
EQ switches -
Let you equalize a program source while recording unequalized "Reverse response" lets you perform tape noise reduction automatically.
2-deck connection -
Lets you apply equalization as you dub tapes.

Specifications SG-90
Equalizer Range:  ±12 dB / ±6 dB (switchable)
Center Frequencies:  16, 25, 40, 63, 100, 160, 250, 400, 630, 1k, 1,6k, 2,5k, 4k, 6,3k, 10k, 16k, 25k Hz
Total Harmonic Distortion:  0,001% (20 - 20,000 Hz, all controls flat, output  1V)
Gain:  0 dB (controls flat)
Frequency Response:  10 - 100,000 Hz,  0 dB, -2 dB
Signal-to-Noise Ratio (IHF, A network):
120 dB (output 2V)
114 dB (output 1 V)
Input Impedance:  47 k ohms
Output Impedance:  200 ohms
Power Requirements:  110/120/220/240 V,  50/60 Hz
Power Consumption:  34 watts
Dimensions (W x H x D):  420 x 131 x 351 mm (16-9/16" x 5-3/16" x 13-13/16")
Weight:  7,2 kg (15 lbs, 14 oz)

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