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

Yamaha CT-400 tuner

Yamaha CT400
High-performance FM/AM stereo tuner featuring output level control, noise-cutting Blend control and clean, simplicity styling.

Make the move to uncompromising component performance - without expensive extra frills.
The CT-400 offers years of clear, low-distortion AM and FM stereo reception to blend with the finest audio system. At the same time it's a masterpiece of no-fuss operation and clean decorator styling.

Sensitivity. This is the ability to pull in signals-  even weak ones. The CT-400's superb 2,0 µV (IHF) sensitivity comes from an FET-equipped FM front end, a type usually reserved for the most expensive equipment.
 Selectivity. The CT-400 easily homes in on the station you tune, excluding nearby interference with an outstanding 75 dB selectivity. This is assured by an FM IF stage incorporating no less than six special ceramic filters.
 Separation. The CT-400's clear, rich FM stereo depth is provided by an excellent 40 dB (400 Hz) stereo channel separation. The secret is a unique balanced differential type multiplex demodulator featuring integrated circuitry.

FM Tuner Section
Usable Sensitivity:  2,0 µV
Image Response Ratio (84 MHz):  55 dB
IF Response Ratio (84 MHz):  75 dB
Spurious Response Ratio (84 MHz):  75 dB
Capture Ratio:  1,5 dB
Effective Selectivity (IHF):  75 dB
Signal-to-Noise Ratio:
Mono :  70 dB
Stereo :  66 dB
Total Harmonic Distortion (400 Hz):
Mono :  0,3%
Stereo:  0,5%
Stereo Separation (400 Hz):  40 dB
Frequency Response:  20 Hz to 14 kHz, +1,5 dB, -3 dB
Subcarrier Suppression Ratio:  40 dB
AM Tuner Section
Usable Sensitivity (IHF, bar antenna):  52 dB/m
Selectivity (1000 kHz):  25 dB
General Section
Power Supply:  AC 100-120V, 220-240V, 50/60 Hz
Power Consumption:  2,6 W (100V)
Dimensions (W x H x D):  436 x 144 x 300 mm
Weight:  5,0 kg

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