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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





Marantz Model 2230


 MARANTZ MODEL 2230 AM/FM STEREO RECEIVER
With impressive specifications and Marantz-exclusive features, the low-prieced Model 2230 offers more value and performance than any other receiver in its class. It delivers 60 watts continuous RMS into 8 ohm speakers from 40 Hz to 20 kHz with total harmonic and intermodulation distortion under 0,5%. Frequency response is ±0,5 dB. Stepped, three-zone controls for Bass, Mid, Treble. Provisions for tape decks, phones, record changers, 4-channel adaptors. Ultra low-distortion FET, RF and IF circuitry. Massive heat sinks; automatic protection for internal circuitry and associated speakers, plus the famous Marantz gold-anodized front panel. Completely enclosed metal chassis finished in simulated walnut or with optional WC-22 walnut cabinet.



Specifications
Tuner Section
FM Quieting Slope
RF Input for 30 dB Quieting : 2,0 µV
Quieting at 5µV RF Input : 53 dB
Quieting at 10µV RF Input : 57 dB
Quieting at 50µV Rf Input : 63 dB
Total Harmonic Distortion Stereo/Mono:  0,30%/0,15%
Selectivity (Alternate Carrier):  60 dB
Capture Ratio:  2,5 dB
Stereo Separation (at 1kHz):  42 dB
Spurious Rejection:  90 dB
Image Rejection:  70 dB
AM Suppression:  50 dB
IF Rejection:  90 dB
AM Sensitivity:  20 µV
Preamplifier Section
Dynamic Range Phono (ratio of input overload voltage to equivalent noise):  96 dB
Phono Sensitivity (for rated output):  1,8 mV
Phono Equivalent Noise Input:  1,5 µV
High Level Input Sensitivity:  180 mV
Preamplifier Output level:  1,0 V
Headphone Output Level:  1,0  V
Tone Controls:
Bass (50 Hz):  ±15 dB
Mid (700 Hz):  ±6 dB
Treble (15 kHz):  ±15 dB
Power Amplifier Section
Power Output RMS:  60 Watts (at 8Ω, both channels driven, at or below rated distortion, 20Hz to 20kHz)
Intermodulation Distortion:  0,5% (at or below rated power, any combination of two frequencies, 20Hz to 20kHz)
Total Harmonic Distortion:  0,5% (at or below rated power, any frequency from 20Hz to 20kHz)
Frequency Response:  20 Hz - 20 kHz ±0,5 dB
Power Bandwidth (IHF both channel driven):  15 Hz to 50 kHz
Basic Amplifier Input Sensitivity /Impedance:  1 V/47 kΩ
Damping Factor:  50
Power Supply: 110/120/220/240 V 50/60 Hz
Dimensions :  16⅞ x 5 x 14 inch
Weight:  40 lbs

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