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【单选题】
电学工程师已反复重申，最好的晶体管扩音机与最好的电子管扩音机在通常测量评价扩音机的音乐再现质量方面的性能是一样的。因此那些坚持认为录制的音乐在最好的电子管扩音机里播放时要比在最好的晶体管扩音机里播放时听起来好的音乐爱好者，一定是在想象他们声称的听到的质量上的差异。 下面哪一项，如果正确，最能严重削弱上述观点?A.
许多人仅凭耳听不能区分正在播放的音乐是在好的晶体管扩音机里播放还是在好的电子管扩音机里播放
B.
电子管扩音机的音乐再现质量的变化范围要比晶体管扩音机的大
C.
有些重要的决定音乐听起来怎么样的特性不能被测量出来
D.
当放出相同的音量时，晶体管扩音机比电子管扩音机的体积小，用电产生的热量少
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