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 MA-6100 amplifier

The finest Pre-Amplifier / Power Amplifier combination
Outstanding versatility in selection of inputs and outputs for multiple tape recording and monitoring. You can even duplicate tapes from one recorder to another while listening to yet a different program source such as records or tuner

Main and Remote speaker switching from the front panel
Reproduces music accurtely with 0,2% distortion from 20 Hz to 20 kHz at full continuous 70 watts RMS per channel, both channels operating into 8 Ω
"Sentry Monitoring" of the output transistors is a McIntosh-patented electronic protection circuit that really protects.
Speciall McIntosh designed output electronic clamping circuit completely protects speakers from possible DC current damage.
Silicon Rectifier power supplies, including one electronically regulated, insure maximum stability on both steady state and transient program material
18,600 microfarads of filter capacity is used in the main positive and negative power supplies. This assures minimum impulse distortion and full power at the lowest frequencies
Fully Direct-Coupled, quasi-complementary output circuit for low distortion and long term durability.

Power Output:
70 watts minimum sine wave continuous average power output, per channel, both channels operating into 8 Ω  load impedance which is 23,7 volts RMS across 8 Ω
40 watts minimum sine wave continuous average power output, per channel, both channels operating into 16Ω  load impedance which is 25,3 volts RMS across 16 Ω
Output Load Impedance:  8 Ω  or 16 Ω
Rated Power Band:  20 Hz to 20,000 Hz
Total Harmonic Distortion:  0,2% maximum harmonic distortion at any power level from 250 milliwatts to rated power per channel from 20 Hz to 20,000 Hz , both channels operating
Intermodulation Distortion:  0,2% (if instantaneous peak power output is twice rated contiuous average power or less per channel with both channels operating for any combination of frequencies 20 Hz to 20 kHz)
Frequency Response:  20 Hz to 20,000 Hz (+0 -,05 dB at rated power)
Damping Factor:  50 at 8 Ω , 100 at 16 Ω 
Noise and Hum:
Power Amplifier:  95 dB below rated output
Aux, Tape, Tuner:  90 dB below rated output
Phono Input, Tape Hd:  76 dB below 10 mV input
Input Sensitivity and Impedance:
Power Amplifier:  3 volts / 100,000 Ω
Phono 1 and Phono 2 :  2,5 mv at 1000 Hz / 47,000 Ω
Tape head :  3 mV / 47,000 Ω
Tape, Aux, Tuner :  300 mv / 250,000 Ω
Bass Controls:  +16 dB to -16 dB at 20 Hz
Treble Control :  +16 dB to -16 dB at 20 kHz
LF Filter:  Active filter, 12 dB per octave rolloff below 50 Hz ; 20 dB down at 20 Hz
HF Filter:  Active filter, 12 dB per octave rolloff above 7000 Hz ; 20 dB down at 20,000 Hz
Semiconductors:  36 Silicon Transitors; 22 Silicon Rectifirs and Diodes; 2 Silicon Bilateral Switches; 2 Triac
Power Requirements:  120 volts, 50/60 Hz, 50 watts at zero signal output, 380 watts at rated output
Front panel [W x H]:  406 mm (16") x 138 mm (5-7/16")
Chassis [W x D]:  381 mm (15") x 330 mm (13") Including Panloc shelf and back panel conectors. Knob clearance required is 38 mm (1-1/2") in front of mounting panel
Weight:  15,43 kg (34 pounds) net
Front panel :  Anodized gold and black with special gold/teal panel nomenclature illumination
Chassis :  chrome and black

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