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)