In these oscillograms, you can see the difference in
Spectral Fidelity between a stressed Mclntosh, and other
amplifiers.
1. The Mclntosh stressed 10 dB above full power
2. An imported amplifier stressed 10 dB above full power
3. A domestically manufactured amplifier which had to be
tested "under-stressed" since it would not perform with
10 dB of overdrive.
The Mclntosh shows only 3 components, which are 44
for one and 50 dB down for all others, roughly equivalent
to 0.3% distortion. The other amplifier shows 17 discords,
some of which are only 10 dB down, or 30% distortion,
with many less than 30 dB down, or 3% distortion.
This is why Mclntosh customers consistently find that
their Mclntosh alone meets the test for accuracy, the test
for clarity, the test for musicality even when a peak of ten
times the power demand suddenly smashes into the
power amplifier.
When other amplifiers are similarly stressed they
generate large quantities of discordant sounds destroying
the real musicality of the reproduced instruments.
Note in oscillogram number 3 the complete failure of
one of the most popular of American amplifiers. If 14 and
15 kHz are amplified at the same time the amplifier shuts
down by "motor boating". It was necessary to lower the
frequency of the test signals to 10 and 11 kHz to even
complete the test or to perform the test at less than half
rated power on this domestically manufactured amplifier.
It is no accident that Mclntosh amplifiers sound better.
It is no accident that a Mclntosh is a better investment.
• It sounds better
• It is more reliable
• It lasts longer
• Its resale value is the highest
If good enough will do, there are at least 100 answers
for you. But if the best is what you need then there is on-
ly one real answer.
Mclntosh—the amplifier that in 40 years has outlived 60
others who have simply faded away.
4 INTRODUCTION
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