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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





JVC R-2X receiver

Trim and Slim with Quartz Tuning

Accuracy and convenience are harmoniously packaged inside the trim and slim cabinet of the R-2X. The most innovative of all the features is the "Digilog" tuning dial; while familiar looking with its frequency calibrations and a "pointer". It is digitally controlled by a powerful LSI. It spells extra convenience.

OCL (Output Capacitr-Less) design; Clear Reproduction Quality

In old capacitor-coupled power amps, reproduction quality was inevitably veiled by noise and distortion added by the output capacitors. By using a split-voltage power supply, we've successfully eliminated the output capacitors so that the speakers are directly coupled with the power amp.

Quartz Synthesizer that sings

Its Quartz-PLL tuning circuit means drift-free electronic performance. Accuracy is assured by use of a quartz reference and two ICs made to our own specifications. Tuning is accomplished by means of a set of Up/Down buttons which sing out every time they're touched.

Desired stations may be tuned in either automatically or manually; the former sequentially lets you scan the tuning band for only those stations above the muting threshold,  while the latter lets you capture any station, even the weak-signal ones below the muting threshold.

Six FM and six AM presets - extra convenience

Once committed to the Memory, you can recall any station with pushbutton simplicity. Memory backup (not requiring batteries) keeps memorized frequencies intact up to about a week if the power is shut off or the unit is unplugged.

31-LED "Dialog" tuning dial - a familiar face.

Your mind may say yes, yes to a digital tuner but your senses may say no, no because of its unfamiliar face. That's why we've  incorporated the unique "Dialog" tuning dial that looks conventional (analog) but actually operates digitally. As you tune (via the tuning buttons), the 31 LEDs shine, one after another to show you your position on the tuning dial.

FM/AM tuner features extra high signal-to-noise

The junction FET RF and four paired variable-capacitance diodes in the, front end are coupled with three newly-developed ICs in the IF and post-IF sections - one each for FM IF, FM stereo demodulator and AM-RF/IF/detector. As a result, the FM tuner features an exceptionally high Signal-to-Noise Ratio of 83 dB for FM mono. Contributing to this surprising figure is the non-switching "static-drive" circuit for the display, housed in an exclusive LSI.

 


Specifications

Amplifier Section

Output Power: 

40 wats per channel, min. RMS both channel driven, into 8 Ω , from 20 Hz - 20 kHz, with no more than 0,03% T.H.D.

42 watts per channel, min. RMS into 8 Ω  at 1 kHz, with no more than 0,008% T.H.D.

Total Harmonic Distortion at Rated Power (1 kHz, 8 Ω ):  0,008%

Intermodulation Distortion:  0,03% at Rated output

Damping Factor:  40 at 8 Ω

Input Sensitivity/Impedance:

Phono :  2,5 mV/47 k Ω

Tape :  150 mV/40 k Ω

Signal-to-Noise Ratio (IHF-A Network, Short-Circuited. New IHF):

Phono :  71 dB/74 dB

Tape :  91 dB / 78 dB

Recording Output

DIN :  30 mV (80 k Ω )

Pin :  150 mV

Frequency Response:

Phono :  20 Hz - 20 kHz ±0,5 dB

Tape :  15 Hz - 50 kHz ±1,0 dB

Phono Overload:  100 mV at 1 kHz (0,1% T.H.D.)

Loudness Control (vol. At -40 dB position):  +7 dB at 50 Hz; +4 dB at 10 kHz

Tone Control

Bass :  ±8 dB at 100 Hz

Treble :  ±8 dB at 10 kHz

FM Tuner Section

Usable Sensitivity:  10,3 dBf (0,9 µV/75 Ω )

50 dB Quieting Sensitivity:

Mono :  14,8 dBf (3 ,0 µV/300 Ω )

Stereo :  38,3 dBf (45 µV/300 Ω )

Stereo Separation at Rec Out:  45 dB at 1 kHz

Distortion (Mono / Stereo)

100 Hz :  0,15% / 0,3%

1 kHz :  0,11% / 0,3%

6 kHz :  0,4% / 0,8%

Signal-to-Noise Ratio (IHF-A Weighted)

Mono :  83 dB

Stereo :  75 dB

Alternate Channel Selectivity:  65 dB (±400 kHz)

Capture Ratio (10 mV/300 Ω ):  1,0 dB

Image Response Ratio:  60 dB (98 MHz)

IF Response Ratio:  90 dB (98 MHz)

AM Suppression:  55 dB

Frequency Response:  30 Hz - 12,5 kHz +0,5 dB -3,0 dB

AM Tuner Section

Sensitivity: 

Bar Antenna : 200 µV/m

Ext. Antenna :  40 µV

Selectivity (±10 kHz):  40 dB

Signal-to-Noise Ratio:  50 dB

Dimensions (W x H x D):  444 x 95 x 350 mm (17-1/2" x 3-3/4"13-13/16")

Weight:  5,9 kg (13 lbs)

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