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# Electrical engineers have repeatedly demonstrated that the best solid-

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Re: Electrical engineers have repeatedly demonstrated that the best solid- [#permalink]
Request you to post the official explanation
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Re: Electrical engineers have repeatedly demonstrated that the best solid- [#permalink]
Electrical engineers have repeatedly demonstrated that the best solid-state amplifiers are indistinguishable from the best vacuum-tube amplifiers with respect to the characteristics commonly measured in evaluating the quality of an amplifier’s musical reproduction. Therefore, those music lovers who insist that recorded music sounds better when played with the best vacuum tube amplifier must be imagining the difference in quality that they claim to hear.

Which one of the following, if true, most seriously weakens the argument?

(A) Many people cannot tell from listening to it whether a recording is being played with a very good solid-state amplifier or a very good vacuum-tube amplifier. - WRONG. Set of people not covered in the passage.

(B) The range of variation with respect to the quality of musical reproduction is greater for vacuum tube amplifiers than for solid-state amplifiers. - WRONG. We have something about differentiation between the two.

(C) Some of the characteristics that are important in determining how music sounds to a listener cannot be measured. - CORRECT. Relatively better than other choices we have.

(D) Solid-state amplifiers are more compact, use less power, and generate less heat than vacuum-tube amplifiers that produce a comparable volume of sound. - WRONG. Irrelevant. We are not sure whether this helps in differentiating between the two amplifiers.

(E) Some vacuum-tube amplifiers are clearly superior to some solid-state amplifiers with respect to characteristics commonly measured in the laboratory to evaluate the quality of an amplifier’s musical reproduction. - WRONG. Highlighted text shows there's a differentiation between the two amplifiers.