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 SR-3557

RS-3557 Features:
Alphanumeric information center simplifies receiver operation, displaying key operating modes and information at all times.
CD Direct switch instantly bypasses signal processing circuitry for maximu signal purity with compact discs.
Preset scan lets you sample up to 30 stations, each for a few seconds.
Available in black or gold finish with rosewood side pnels.
Four independent power amplifiers,
Superscope FX sound system featuring Dolby ProLogic
44-key remote control for fingertip operation of major functions of receiver and other Century Collection components.
Can memorize up to 30 tuner preset stations in three multiscan banks.
Multi scan tuner library permits presets to be grouped, recalled, and scanned in three individual groups, so each member of the family can have individualized station memories.
Two video inputs, each with composite video plus stereo audio or RF input.
Electronically calibrated precision tone controls adjust bass, midrange, treble.


Specifications RS-3557
Rated Power Output (minimum contiuous watts/channel, from 2 Hz to 20 kHz, both channel driven into 8 Ω):  100 W
Total Harmonic Distortion (at rated power, from 20 Hz to 20 kHz):  0,03%
Intermodulation Distortion (at rated power):  0,03%
Rear Channel Output Power:  20 W
Phono Preamplifier:
Frequency Response, RIAA Deviation, (from 20 Hz to 20 kHz):  ±0,5 dB
Signal-to-Noise Ratio:  75 dB (A-weighted)
Input Sensitivity (for rated power):  2,5 mV
High Level Inputs:
Frequency Response (from 20 Hz to 70 kHz):  +1 dB, -3 dB
Signal-to-Noise Ratio:  95 dB (A-weighted)
Input Sensitivity
For Rated Output Power, except CD:  150 mV
For Rated Output Power, for CD:  200 mV
Tone Controls at 100 Hz and 10 kHz:  ±8 dB
FM Section
Usable Sensitivity Mono:  11,2 dBf
50 dB Quieting [Mono/Stereo]:  12/38 dBf
Signal-to-Noise Ratio at 65 dBf [Mono/Stereo]:  76/70 dBf
Total Harmonic Distortion at 65 dBf, 1000 Hz [Mono/Stereo]:  0,15 / 0,3%
Stereo Separation, at 1000 Hz:  45 dB
Capture Ratio:  1,5 dB
Frequency Response  (from 30 Hz to 15 kHz):  1 dB - 3 dB
AM Section
Usable Sensitivty:  55 dB/m
Signal-to-Noise  Ratio:  45 dB
Image Rejection:  40 dB
Selectivity:  20 dB
Dimensions (W x H x D):  16-15/16" x 16-5/8" x 5-15/16"
Weight:  32,21 lbs
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