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





Akai AT-2250



Specifications
FM TUNER SECTION
Frequency Range:  87,5 MHz to 108 MHz
Sensitivity (IHF):  1,9 μV
Capture Ratio:  1,3 dB
Selectivity (IHF):  More than 65 dB
Image Rejection:  More than 60 dB (98 MHz)
IF Rejection:  More than 85 dB (98 MHz)
Spurious Rejection:  More than 85 dB (98MHz)
AM Suppression:  60 dB
Signal-to- Noise Ratio:  70 dB
Harmonic Distortion:
Mono:  Less than 0,1% (100% modulation)
Stereo:  Less than 0,2% (100% modulation)
Stereo Separation:  More than 42 dB (1 kHz)
Sub Carrier Suppression:  More than 40 dB
Output Voltage:  500 mV (100% modulation)
Antenna Input Impedance:  300 ohms balanced, 75 ohms unbalanced

AM TUNER SECTION
Frequency Range:  520 kHz to 1,605 kHz
Sensitivity (IHF):  100 μV/m (bar antenna), 17 μV (external antenna)
Selectivity (IHF):  More than 30 dB
Image Rejection:  More than 50 dB (1 MHz)
IF Rejection:  More than 40 dB
Signal to Noise Ratio:  More than 55 dB
Output Voltage:  500 mV (30% modulation)
Antenna:  Built-in ferrite bar antenna

MISCELLANEOUS
Semi-Conductors:  Transistors: 6;  Diodes: 7;  FETs: 1;  ICs: 3
Power Requirements:  110-120/220/240 V, 50 -60 Hz Switchable
Dimensions (W x H x D):  380 x 130 x 220 mm;  (15 x 516 x 8,7 inches) 

Weight:  4,7 kg (10,3 lbs)
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