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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





McIntosh C-4

 Model C-4 Equalizer Pre-Amplifier Low Distortion Control Center

An equalizer Pre-Amplifier is the control center of the sound reproducing system. Low distortion, stability, and adequate frequency response arc as important in the Equalizer Pre-Amplifier as in the power amplifier. The Mclntosh C-4 provides these vital features. Circuit arrangement and techniques bring complete freedom from impulse types of distortion. (Turning the unit on and off or changing the level suddenly will not cause amplifier flutter.) There are five input channels, two of which are equalized for use with magnetic cartridges. Stable feedback amplification permits full adjustment of cither the treble or bass controls without any amplifier instability whatsoever.

 Features:
• Bass Accentuate and Attenuate
• Treble Accentuate and Attenuate
• Eleven position Bass and Treble compensation switch for magnetic or constant amplitude cartridges
• Master on-off switch and volume control
Specifications:
Delivers 4 volts at less than 0,3% distortion (20 - 20,000 ha, of any settings)
Bass : Accentuate 18 dB / Attenuate 20 dB at 20 Hz
Treble :  Accentuate 17 dB / Attenuate 20 dB at 20,000 Hz
Five Input Channels:  Tape; Tuner; Microphone and two phonograph
Separate level Adjustment:  on each channel
Variable load and magnetic-constant amplitude switch on one phono channel.
Two main and one tape output, each from a cathode follower.
Three AC Outlets:  controlled by master On-off switch.
Powered:  by any McIntosh power amplifier or self-powered with D-8 power supply
Hum Level:  -110 dB reffered to input
Dimensions:
With Hardwood Enclosure :  11-1/2" x 7-3/4" x 4-7/8"
Solo Control Unit :  10-7/8" x 7-1/2" x 3-9/16"
Front Panel Size :  11" x 4-1/4"
Weight (net , includes tubes, connectors, etc):  2,52kg (5 lbs 9 oz)

Finish Cabinet:  mahogany (C-4M) or Blonde (C-4B)
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