Why not more talk about Waveguide damping and/or foam inserts - Page 5 - AVS Forum | Home Theater Discussions And Reviews
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Old 08-17-2015, 07:15 PM
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Originally Posted by Jag768 View Post
+1

if you do the comparison, than ideally the response should be EQ-ed to be equal. For the Klipsch speakers, the harsh sound could also be related to diffraction issues.
sorry, can you expound on what you are suggesting. im not quite sure im following.
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Old 08-18-2015, 11:39 AM
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Originally Posted by 1201 View Post
sorry, can you expound on what you are suggesting. im not quite sure im following.
Well when you put in foam in your waveguide, three things can happen:

- amplitude response changes (this is for sure, it will result in a low pass filter)
- directivity changes
- HOMs are reduced

The idea is, that the latter is responsible for the audible improvement. But the only way to know is by making sure the other two are not the case. So you need to correct the amplitude response after inserting the foam, and measure the directivity to make sure it's equal. If it's not, than you might take them into an anechoic environment (like outdoors) to reduce the effect the directivity has on the audible quality. But it's a hassle, i understand .
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Old 08-18-2015, 09:40 PM
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oh, i see. thanks for the clarification
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Old 08-19-2015, 05:30 AM
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one thing i did notice is that as you add stuff to the front of a speaker,the distortion increases- the lowest distortion measured by REW is with no grill or fill
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Old 08-19-2015, 06:13 PM
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one thing i did notice is that as you add stuff to the front of a speaker,the distortion increases- the lowest distortion measured by REW is with no grill or fill
That's purely a function of the lowered efficiency.

Besides, harmonic distortion at these levels is perceptually completely irrelevant.

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Old 08-20-2015, 11:34 PM
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That's purely a function of the lowered efficiency.

Besides, harmonic distortion at these levels is perceptually completely irrelevant.
roger that. thanks
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