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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





Kyocera R-461


The  Kyocera R-461
Features
50 watts per channel (continous RMS both channels driven into 8 ohms from 20 Hz to 20 kHz with no more than 0,02% Total Harmonic Distortion
Compatible with Kyocera Full System Remote Control network
Manual/electronic volume control
Subsonic filter at 20 Hz with 12 dB/octave slope
High filter
Two tapemonitors with dubbing
Pre-amp Output/Main-amp Input jacks
MOS FETs in the amplifier driver stage for better dynamic performance
Low-feedback design for reduced transient intermodulation distortion
Female banana jacks bypass speaker switching for straight-wire-with-gain circuit
Quartz frequency synthesis tuning
FM front end with MOS FETs and High-Q varicaps for minimum interference
Ceramic IF filters for high selectivity, low distortion
6 AM + 6 FM station presets

Specifications
Power Output RMS (both ch. Driven into 8 Ω with no more than 0,02% T.H.D., 20 Hz - 20 kHz):  50 W/ch
Dynamic Short-Term Power (at 1 kHz):
80 W/ channel at 8 Ω
110 W / channel at 4 Ω
125 W/ channel at 2 Ω
Total Harmonic Distortion (at rated power):  0,02%
Power Bandwidth (-3 dB re rated power):  10 Hz - 60 kHz
Intermodulation Distortion (at rated output,SMPTE):  0,02%
Slew Rate:  40 V/usec
Rise Time:  1,5 usec
Dynamic Headroom , 8 Ω :  2,1 dB
Input Sensitivity/Impedance:
Phono MM  :  2,5 mV/47 k Ω/100 pF
Others :  150 mV/30 k Ω
Phono Input Overload  1 kHz, 0,5% T.H.D.:
Phono MM :  150 mV
Signal-to-Noise Ratio (IHF short circuited, A-weighted, rated output):
Phono MM :  80 dB
Others :  95 dB
Turnover Frequencies:
Bass Control :  200 Hz
Trable Control :  5 kHz
High Filter (6 dB/oct) at 10 kHz :  -6 dB
Subsonic Filter (12 dB/oct) aat 188 Hz :  -3 dB
FM Usable Sensitivity (mono):  10,3 dBf
FM 50 dB Quieting Sensitivity
Mono :  17,0 dBf
Stereo :  37,2 dBf
FM Capture Ratio (Normal IF):  1,2 dB
FM Distortion, 1 kHz, Normaal IF
Mono :  0,08%
Stereo :  0,12%
FM Stereo Separation, Normal IF, 1 kHz:  48 dB
FM Frequency Response (30 Hz - 15 kHz):  +0 dB/-1,0 dB
FM Signal-to-Noise  Ratio, A -weighted
Mono :  77 dB
Stereo :  72 dB
FM Alternate Channel Selectivity:
Normal IF :  55 dB
FM Spurious Rejction:  86 dB
FM IF Rejection:  100 dB
FM Image Rejection:  68 dB
FM Subcarrier product Ratio:  58 dB
Power Consumption:  175 W
Dimensions (W x H x D):  460 x 110 x 340 mm (18-1/8" x 5-5/16" x 13-3/8")
Weight:  8,2 kg (18 lbs)
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