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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-5400 receiver

The Kenwood KR-5400 is the most sophisticated stereo receiver ever offered at a medium price. It dlivers more power than most listeners will ever use. And it combines this performance with features and controls that rival those of more expensive separate tuners and amplifiers.
Kenwood utilizes the finest parts and materials and incorporates the most advanced engineering concepts in this fine  unit, to assure you of top performance through years of constant use. From preamp yo power amp to tumer section, the KR-5400 is a receiver you will find hard to beat.

Direct-Coupled, Pure Complementary Symmetry Output Circuitry.
Nothing comes between you and your music with Kenwood's direct coupled circuitry. Flat frequency response from ultra-lows to highest highs is assured at all power levels ip to rated output.
Large Power Transformer - Oversize heat Sinks
Kenwood's massive power transformer forms the heart of a dual positive-negative supply to symmetrically power the high output transistor stages. These are mounted on massive heat sinks for safe, cool operation even under conditions of continuous full power output. This no-compromise design assures years of stable, trouble-free performance.
Exclusive ASO Dual protection
Circuit protects both your speaker system and your receiver. Should the 'area of sale operation" be exceeded, en instant-acting relay disengages the speakers.
Three Speaker System Capability.
The KR-5400 lets you enjoy stereo in as many as three separate listening areas of your home. Listen to any one speaker system or activate two systems at once with a touch of the front panel selector switch. A front panel headphone jack adds another listening dimension.
An Advanced new preamplifier
The precision equalizer-phono preamplifier section of the KR-5400 uses low-noise metal encapsulated transistors for the ultimate in Signal-to-Noise ratio and reliability. With phono input sensitivity of 2,5 mV up to 330 mV (p-p) of input signal can be accommodated at less than 0,5% Total Harmonic Distortion. Mic input facilities on the front panel are equally noise-free and low in distortion.
Dual tape Monitor Circuits
The Kenwood dual tape facilities and individual tape monitor pushbuttons allow you to monitor two tape decks, or to dub from one deck to another while listening to program source or recorded results.
Precise Tonal Compensation
The bass and treble controls of the KR-5400 employ an ingenious multi-purpose integrad circuit. Negative feedback is used to assure no audible distortion regardless of how much tonal compensation is required to match room acoustics, speaker characteristics or program source deficiencies.
FM IF Stages.
The IF section of the KR-5400 is equipped with permanently aligned solid state filters for high selectivity, superb capture ratio, and superior AM suppression. Spurious signal rejection is more than 90 dB.
Exceptional Tuner Performance
The tuner of the KR-5400 is one of the most advanced available today. It achieves a sensitivity of 1,9 µV with an unusually sharp quieting slope to assure noiseless and distortion-free reception.
Phase-lock-Loop Multiplex Decoder
A multi-function IC, used in the stereo decoder section, operates on the phase-lock-loop principle to insure uniform separation at all audio frequencies. A newlly designed LC filter effectively reduces beat interference and intermodulation distortion normally caused by carrier leakage.
4-channel Ready
Special, inputs and outputs for connection of any four-channel decoder or adapter are provided on the KR-5440. when you are ready for quadraphonic sound, there will be no need to upset tape inputs or outputs. You retain full tape monitoring facilities for as many as two tape decks. There's even a 4-channel detector output for future discrete four-channel broadcasting when it's approved.
Specifications
FM Tuner Section
Frequency Range:  88 MHz - 108 MHz
Usable Sensitivity (IHF):  1,9 µV
Quieting Slope:   5 µV (48 dB); 10 µV (60 dB);  50 µV (70 dB)
Frequency Response:  20 Hz to 15,000 Hz +0,5 dB, -1,5 dB
Harmonic Distortion:
Mono :  0,3% (at 400 Hz, 100% modulation)
Stereo :  0,5% (at 400 Hz, 100% modulation)
Signal-to-Noise Ratio:  68 dB at 1 mV input
Image Rejection:   70 dB
Selectivity (IHF ALT channel):  65 dB
IF Rejection:  90 dB
Spurious Signal Rejection:  90 dB
AM Suppression:  70 dB
Capture Ratio:  1,5 dB
Stereo Separation:  35 dB at 1 kHz ;  25 dB at 10 kHz
Sub Carrier Suppression:  60 dB
Antenna Impedance:  300 Ω balanced; 75 Ω unbalanced
AM Tuner Section
Usable Sensitivity (IHF):  18 µV
Signal-to-Noise Ratio:  45 dB at 1 mV input
Image Rjection:  60 dB
Selectivity (IHF):  30 dB
IF Rejection:  40 dB
Antenna:  Buily-in ferrite bar antenna . External antenna terminal
Main Amplifier Section
Continuous Power Output RMS
Both Channel Driven:
35 + 35 watts into 8 Ω at 20 Hz to 20 kHz
37 + 37 watts into 8 Ω at 1 kHz
47 +47 watts into 4 ohms at 1 kHz (DIN)
Dynamic Power Output (IHF):
115 watts into 8 Ω
150 watts into 4 Ω
Total Harmonic Distortion: 
0,5% at rated power into 8 Ω
0,07% at 1/2 rated power into 8 Ω at 1 kHz
Intermodulation Distortion (60 Hz :7 kHz = 4:1): 
0,5% at rated power into 8 Ω
0,07% at 1/2 rated power into 8 Ω
Power Bandwidth:  10 Hz to 30,000 Hz
Damping Factor:  50 at 8 Ω
Frequency Response :  10 Hz - 40 kHz
Speaker Impednce:  accept 4 Ω to 16 Ω
Preamplifier Section
Input Sensitivity /Impedance:
Phono 1, 2 :  2,5 mV/50 k Ω
Aux :  150 mV/80 k Ω
Tape Play :  150 mV/80 k Ω
Mic :  2,5 mV/50 k Ω
Maximum Input Voltage (RMS)
Phono 1, 2 :  120 mV (T.H.D. 0,3% at 1 kHz)
Signal-to-Noise Ratio (IHF A Curve):
Phono 1, 2 :  70 dB
Aux :  90 dB
Tape Play :  90 dB
Mic :  65 dB
Output Voltage/Impedance
Tape Rec (Pin) :  150 mV/ 100 Ω
Tape rec (DIN) :  30 mV/80 k Ω
Frequency response
Phono :  RIAA Standard curve ±1 dB
Tone Controls
Bass :  ±10 dB at 100 Hz
Treble :  ±10 dB at 10 kHz
Loudness Control (-30 dB) :  ±8 dB at 100 Hz; ±5 dB at 10 kHz
High Filter :  -10 dB at 10,000 Hz
Low Filter :  - 8 dB at 100 Hz
General
Switches:
Speaker Selector :  Off, A, B, C,  A + B, A + C
Input Selector:  AM - FM - PHONO 1 - PHONO 2 - AUX - MIC
Mode :  Left - Right - Stereo - REV - MIX
Tape Monitor :  Source Mon - B Mon - A Play ;  Source - B Play - A Mon
Others:  Low and High Filter, Loudness, FM Muting, Mic and Phone jack
AC Outlets:  Switched 1
Power
Supply :  110 - 120 - 220 - 240 V AC, 50/60 Hz
Consumption:  340 watts at full power; 40 watts at no signal
Dimensions (W x H x D):  480 x 151 x 344 mm (18-15/16" x 5-15/16" x 13-9/16")

Weight:  11,5 kg (25,4 lbs)