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<blockquote data-quote="audio_phill" data-source="post: 7140978" data-attributes="member: 605512"><p>The AQ subs are mid/High Fs and high Qts, no real transience to them. DD goes the other way and tries to keep Qts low and the Fs a mid/Low Fs but this causes a missing bandwidth in the 35-50 Hz range depending on tuning. PhishHead seems to be familiar with a warm flat response associated with Low Fs Mid Q subs (which used to be the goal of all builders till the SPL wars started) and when the DD/AQ would be side by side compared to something as warm and ear friendly as the Mach 5 IXL 15.2 or Diamond Audio Hex Pro 12, they are lacking in one range or another, I believe that may be what he is referring to as hollow (missing key freq&#039;s across a musically important bandwidth.) There are lines of DD that are more ear friendly and cause far less listening fatigue than the 9500 series, but I also have come to see that most compare the HDC3 to the 9500 for some reason.</p></blockquote><p></p>

[QUOTE="audio_phill, post: 7140978, member: 605512"] The AQ subs are mid/High Fs and high Qts, no real transience to them. DD goes the other way and tries to keep Qts low and the Fs a mid/Low Fs but this causes a missing bandwidth in the 35-50 Hz range depending on tuning. PhishHead seems to be familiar with a warm flat response associated with Low Fs Mid Q subs (which used to be the goal of all builders till the SPL wars started) and when the DD/AQ would be side by side compared to something as warm and ear friendly as the Mach 5 IXL 15.2 or Diamond Audio Hex Pro 12, they are lacking in one range or another, I believe that may be what he is referring to as hollow (missing key freq's across a musically important bandwidth.) There are lines of DD that are more ear friendly and cause far less listening fatigue than the 9500 series, but I also have come to see that most compare the HDC3 to the 9500 for some reason. [/QUOTE]

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