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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





Kenwood KR-5010 receiver

Kenwood KR-5010 in an AM/FM stereo receiver FTC rated for 8 ohms at 45 watts RMS oer channel, from 20 Hz to 20 kHz , at no more than 0,03% Total Harmonic Distortion
Features include a stereo beacon, combination FM center-channel and AM signal strength tuning meter, left and right output power meters calibrated from 0,01 to 100 watts into 8 ohms and -40 dB to +3 dB with 0 dB representing 50 watts, wide and narrow FM IF bandwidth selector, an Fless than mute automatically applied in the auto stereo mode 9mute is always off in the mono mode), and an output hold-off that prevents power supply turn-on transients from being fed to the speakers.
There are inputs for magnetic phono and two tape. Outputs for two speaker systems, two tape, and phones.
Controls are provided for tuning, volume, balance, ganged bass, ganged treble, input selection, and speaker selection. There are switches for loudness compensation, hi-filter, tape monitor A, and tape monitor B.
The FM antenna inputs is 75 Ω/300 Ω. A rod antenna and external connection are provided for Am. Switched and unswitched AC outlets are provided.

Performance
FM Tuner - full limiting was attained with 1,6 µV. The monophonic high fidelity sensitivity (60 dB quieting) measured 7 µV. The stereo high fidelity sensitivity (55 dB quieting) was 55 µV. Full mute release was attained with 1,6 µV
At standard test level the stereo frequency response measured +0,1 dB / -1,5 dB from 30 to 15,000 Hz. With the receiver set for wide selectivity the distortion measured 0,15% T.H.D. for mono 0,6% T.H.D. for stereo. With narrow selectivity the distortion measured 0,11%  T.H.D. for mono, and 0,4% T.H.D. for stereo. The signal to noise ratio was 69 dB. Stereo separation measured 40 dB. Selectivity was fair (wide) to very good (narrow)
AM Tuner - distortion was a little higher than average
Amplifier - the power output at the clipping level with both channels driven 20 to 20,000 Hz into 8 Ω measured 43 watts RMS per channel. The Frequency Response at 43 watts/8 Ω was +0 dB/-0,2 dB from 20 to 20,000 Hz at a distortion no higher than 0,035% T.H.D. at any frequency
The tone control range measured +11 dB / -9 dB  at 50 Hzl +9 dB/-8 dB at 10,000 Hz
The magnetic input hum and noise measured -62 dB; stereo separation was into the noise level.
Within the power capabilities of the amplifier the power meters were within 10% accuracy at their calibrated values. Frequency Response was essentially "flat" from 20 Hz to 20,000 Hz

Overal dimensions (W x H x D): 18-1/2" x 5-1/2" x 14-1/8"
Weight :  19 lbs
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