More Purifi goodies aka Erin you’ve done it again!

Thank you @bikinpunk who has posted the Klippel measurements and reviews of the aluminium 6 inch and 8” midwoofers and 6” midrange.

www.erinsaudiocorner.com


I need to pour myself a coffee to look at all the data and then sign myself up to Afterpay…

PS. Can you add normalised off axis measurements please?
Any chance of doing distortion at 102 or 106dB?
 
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Piotr z,

I see what you are saying, but based on my experience of distortion testing, is that measuring at such a low level, is that there is nothing to see- it's all buried beneath the noise floor.

Here's my measurement of an original PTT6.5W04-01A, in box, with my custom analogue filter.

1654668930593.png
 
Such comparison would give us better understanding of driver behavior at "normal" home listening levels.

76dB @ 1m for a single drive unit would be around 62-63dB @ 4m for a stereo pair (factoring in room gain, correlation in the LF). I'm not factoring in baffle step compensation which would actually lower the output even more. This would be much lower than I would personally ever listen to speakers and probably for the vast majority of others as well, even if listening at closer distances.

IOW, the 76dB @ 1m per drive unit data isn't going to come from me.
 
76dB @ 1m for a single drive unit would be around 62-63dB @ 4m for a stereo pair (factoring in room gain, correlation in the LF). I'm not factoring in baffle step compensation which would actually lower the output even more. This would be much lower than I would personally ever listen to speakers and probably for the vast majority of others as well, even if listening at closer distances.

IOW, the 76dB @ 1m per drive unit data isn't going to come from me.
Thanks for answer 🙂 I normally listen a bit closer and when i measured i found out that sometimes i'm listening @ 70dB or less. But anyway thanks for providing all this data for us.
 
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