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<blockquote data-quote="Ivan Beaver" data-source="post: 24286" data-attributes="member: 30">Re: Why Do TEF Systems read 3-5 dB high ?&nbsp;Remember that this is the 8 ohm TH115-not the current 4 ohm.&nbsp; And we are also assuming the current 2181 design/components is the same as the one at the shootout-I have no idea.What gets weird in comparing the measurements is that the TH115 looks kinda like the TH115 measurement we took (but with the room issues added in).&nbsp; But the 2181 doesn&#039;t look anything like EV&#039;s measurement on their spec sheet.It could be that the EV measurement is 1/2 space-which would account for some differences-but not the shape (so much anyway).One of the misconception people have is that a 1/2 space measurement is simple 3dB higher than a full space measurement.This is not the case.&nbsp; At some freq it will be 3dB higher, but at others it will be the same (and I am talking about the below 200Hz) range.So you cannot just &quot;add&quot; 3dB and get a new number.&nbsp; It is actually the shape of the CURVE that changes.Which just adds to the fact of how important it is to see a measured curve and know how it is measured if you REALLY want to compare boxes-besides side by side of course.</blockquote>

[QUOTE="Ivan Beaver, post: 24286, member: 30"] Re: Why Do TEF Systems read 3-5 dB high ? Remember that this is the 8 ohm TH115-not the current 4 ohm. And we are also assuming the current 2181 design/components is the same as the one at the shootout-I have no idea. What gets weird in comparing the measurements is that the TH115 looks kinda like the TH115 measurement we took (but with the room issues added in). But the 2181 doesn't look anything like EV's measurement on their spec sheet. It could be that the EV measurement is 1/2 space-which would account for some differences-but not the shape (so much anyway). One of the misconception people have is that a 1/2 space measurement is simple 3dB higher than a full space measurement. This is not the case. At some freq it will be 3dB higher, but at others it will be the same (and I am talking about the below 200Hz) range. So you cannot just "add" 3dB and get a new number. It is actually the shape of the CURVE that changes. Which just adds to the fact of how important it is to see a measured curve and know how it is measured if you REALLY want to compare boxes-besides side by side of course. [/QUOTE]

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