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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 2220


 MARANTZ MODEL 2220 AM/FM STEREO RECEIVER
Traditional marantz quality and high performance make the exciting Model 2220 a lot of receiver for little money. With utmost reliability, it offers 40 watts continuous RMS into 8 ohm speakers, from 40 Hz to 20 kHz with total harmonic and intermodulation distortion less than 0,9%. Frequency response is an amazing ±1 dB. The professional preamp control section includes provisions for record changer, tape decks, phones, etc.,  plus precision over virtually every audio variable. Behind the Model 2220's gold-anodized front panel are: low-noise, low-distortion FET, RF and IF circuitry; massive heat sinks; and automatic protection for internal circuitry and associated speakers. Completely enclosed metal chassis is finished in simulated walnut.



Specifications
Tuner Section
FM Quieting Slope
RF Input for 30 dB Quieting : 2,1 µV
Quieting at 5µV RF Input : 50 dB
Quieting at 10µV RF Input : 56 dB
Quieting at 50µV Rf Input : 60 dB
Total Harmonic Distortion Stereo/Mono:  0,50%/0,30%
Selectivity (Alternate Carrier):  50 dB
Capture Ratio:  3,0 dB
Stereo Separation (at 1kHz):  40 dB
Spurious Rejection:  65 dB
Image Rejection:  50 dB
AM Suppression:  45 dB
IF Rejection:  60 dB
AM Sensitivity:  26 µV
Preamplifier Section
Dynamic Range Phono (ratio of input overload voltage to equivalent noise):  93 dB
Phono Sensitivity (for rated output):  2,1 mV
Phono Equivalent Noise Input:  2,2 µV
High Level Input Sensitivity:  150 mV
Headphone Output Level:  0,7 V
Tone Controls:
Bass (50 Hz):  ±12 dB
Treble (15 kHz):  ±12 dB
Power Amplifier Section
Power Output RMS:  40 Watts (at 8Ω, both channels driven, at or below rated distortion, 20Hz to 20kHz)
Intermodulation Distortion:  0,9% (at or below rated power, any combination of two frequencies, 20Hz to 20kHz)
Total Harmonic Distortion:  0,9% (at or below rated power, any frequency from 20Hz to 20kHz)
Frequency Response:  20 Hz - 20 kHz ±1 dB
Power Bandwidth (IHF both channel driven):  15 Hz to 50 kHz
Damping Factor:  45
Power Supply: 110/120/220/240 V 50/60 Hz
Dimensions :  16⅞ x 5 x 14 inch
Weight:  35 lbs

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