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-861

If receivers have something of a bad reputation among serious audiophiles, there's a good reason, in Japan, where everybody owns compnent high fidelity, nobody owns one-piece receivers. In fact, North America may be the only place where receivers represent a majority of the market.
For most Japanese audio engineers, receivers are strictly for export. They're not serious components at all. So receivers are designed by the second-string engineers. This explains why even companies with decent separates tend to load their receivers up with meaningless knobs, buttons, and displays.
The irony here is that  there's no reason why receivers must be second-class components. There's nothing to prevent a company from using the same common sense and judgement in receiver design as they exercise with separates. This is the guiding philosophy behind Kyocera receivers.

 MOS FETS in the Driver Stage
A rarity in receivers, Metal-Oxide-Semiconductor Field Effect Transistors (MOS FETs) are used in the driver stages of all Kyocera receivers for their superior transient response and isolation characteristics.
Pre-Out/Main-In jacks
While it is hard to find a receiver with pre-amp output/ main-amp input jacks nowadays,, all Kyocera receivers have them. So you can connect outboard signal receiver as part of an elaborate multi-amp system. That's particularly important considering the multi-room capability of the Kyocera Full-System Remote Control network.
 The Kyocera R-861
100 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
Parametric bass, midrange and treble controls
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
Toroidal transformer
Low-feedback design for reduced transient intermodulation distortion
Oxygen-Free Copper (OFC) wiring fo reduced noise
Moving Magnet/Moving Coil phono input stage
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
Automated  IF bandwidth switching (Wide/Narrow) adapts to your reception conditions
High-frequency FM comparator for reduced noise
FM quadrature detector for low distortion
Switchable de-emphasis for Dolby FM broadcasts
Chopper type FM stereo demodulator for improved stereo separation
High blend switch for better sound on weck FM stations
7AM + 7 FM station presets
Power Output RMS (both ch. Driven into 8 Ω with no more than 0,02% T.H.D., 20 Hz - 20 kHz):  100 W/ch
Dynamic Short-Term Power (at 1 kHz):
120 W/ channel at 8 Ω
180 W / channel at 4 Ω
230 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:  50 V/usec
Rise Time:  1,0 usec
Dynamic Headroom , 8 Ω :  1,0 dB
Input Sensitivity/Impedance:
Phono MC  :  125 µV/100 Ω
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.:
phonoMC :  8 mV
PhonoMM :  150 mV
Signal-to-Noise Ratio (IHF short circuited, A-weighted, rated output):
Phono MC :  68 dB
Phono MM :  88 dB
Others :  100 dB
Turnover Frequencies:
Bass Control :  100 - 500 Hz
Midrange Control :  0,5 - 2,0 kHz
Trable Control :  2 - 10 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):  9,8 dBf
FM 50 dB Quieting Sensitivity
Mono :  14,8 dBf
Stereo :  35,8 dBf
FM Capture Ratio (Normal IF):  1,0 dB
FM Distortion, 1 kHz, Normaal IF
Mono :  0,06%
Stereo :  0,07%
FM Stereo Separation, Normal IF, 1 kHz:  58 dB
FM Frequency Response (30 Hz - 15 kHz):  +0 dB/-0,5 dB
FM Signal-to-Noise  Ratio, A -weighted
Mono :  82 dB
Stereo :  76 dB
FM Alternate Channel Selectivity:
Normal IF :  40 dB
Narrow IF :  81 dB
FM Spurious Rejction:  95 dB
FM IF Rejection:  120 dB
FM Image Rejection:  85 dB
FM Subcarrier product Ratio:  65 dB
Power Consumption:  320 W
Dimensions (W x H x D):  460 x 132 x 360 mm (18-1/8" x 5-3/16" x 14-3/16")
Weight:  12,3 kg (27 lbs)

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