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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 MC-60


The Mcintosh Model MC-60 is a 60 watt high fidelity power amplifier designed for home entertainment systems and professional applications where high power and distortion free performance is required. The Model MC-60, like all other McIntosh power amplifiers. Uses the exclusive McIntosh high efficiency output circuit and bifilar output transformer to obtain the high standard of performance found in this amplifier.
Some of the more important characteristics of the amplifier are less than 1/3% harmonic distortion at any power output up to 60 watts and at any frequency in the audio spectrum, 20 to 20,000 cps; less than 1/2% intermodulation distortion for all power levels up to 120 instantaneous peak watts; and noise and hum level 90 dB or more below the rated output level.

The MC-60 has two high impedance inputs and many be operated from any signal source deliviring 0,5 volts or more, or directly from a McIntosh Audio Compensator or pre-Amplifier such as the  Models C-4, C-8, C-104 or C-108.
Output impedances of 4, 8 and 16 ohms are provided for direct connection to loudsapeakers. An additional 600 Ω output is present for use with lines.

Specifications
Power Output:  60 watts continuous
Input Level:
Input 1 :  0,5 volts to 30 volts, with gain control
Input 2 :  2,5 volts (for use with McIntosh Audio Compensators and pre-Amp)
Frequency Range: 
20 to 30,000 Hz ±0,1 dB at 60 watts output
16 to 60,000 Hz ±0,5 dB at 60 watts output
10 to 1000,000 Hz ±1,0 dB at 30 watts output
Total Harmonic Distortion:  less than 1/3% at 60 watts output or less, 20 to 20,000 Hz
Intermodulation Distortion:  less than 1.2% if instentaneous peak power is below 120 watts
Impulse Distortion:  Negligible
Noise and Hum level:  90 dB or more below rated output
Damping Factor:  15 or better for 4, 8 and 16 Ω output, 20 for 600 Ω
Input Impedance:
0,5 meg for 0,5 volt input
0,13 meg for 2,5 volt input
20 cycles to 40,000 cycles
Output Impedance:
4, 8, 16 and 600 ohms (600 ohmis balanced to ground)
Phase Shift:  ±8° 20- 20,000 Hz
Tube Complement:
Rectifier :  2-5U4GA
Pre-Amp :  12 AX7
Phase Inverter : 12AU7
Voltage Amp : 12BH7
Driver : 12AX7
Output : 2-6550
Dimensions (W x H x D):  14" x 10" x 8"
Weight:  41 pounds net
Finish :  chrome and black


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