Can you show me?I said that it looks like 1M measurement.
Can you show me?I said that it looks like 1M measurement.
Yes, I agree. if you completely filled the speaker with sand you could probably block it further but that would spoil the box tuning/compresion.. Did you see the impedance responses after he filled the speaker with more stuffing?
we have already looked at various options along these linesI saw them. Impedance peaks are reduced and bass response is shelved. Not good sign as passive speaker.. but reduced the distortion.
If the magnet - frame resonance is the main reason, how about adding damping sheet on the frame or adding pressure on the back(magnet). To be pressed by hard stuff when assmble the woofer.
View attachment 58View attachment 59
Thats the PR measurements.
First picture is it.Thats the PR measurements.
What about a 1m on front axis for A and B?
But 97 to 85dB is more important.The Purezza is a different design with a different PR and a not very flat low frequency response.
He hasnt properly corrected the baffle step or possibly got the box volume wrong. If he had the SPL at 300Hz and above would be about 4 dB lower, hence you would need to apply a lot more power (twice as much) to achieve 97dB and you would have more relative distortion.
View attachment 57
Its not what I asked for.First picture is it.
To compare I uploaded PR response too.
yep, see my point about powerBut 97 to 85dB is more important.
It is not 3~4dB diffrence.
Sample A 85dB distortion level similar Selah’s 97dB.
Is it randomable distortion that we just should accept?
I can only find 1M measurement of Sample A before modification. Sorry.Its not what I asked for.
we need to see the measurement at 1m from the front of the speaker for both sample A and B.
....mmmmm.......I can only find 1M measurement of Sample A before modification. Sorry.
But 1m measurment and PR NF measurement of Sample A are similar enough.
If the distortion occured from the back, it can ba leaked by tweeter unsealed gap, and PR diaphragm.
Other measurment datas uploaded from him are after modification.....mmmmm.......
The nearfield PR measurements are not relevant and very easily made different by very small changes in distance to the microphone and its position.
No, sorry you are just speculating. Its meaningless.
So what are you saying? Do you not have a simple on front axis direct comparison between the two speaker samples?
Right, so you cannot actually demonstrate that there ever was a significant difference between the two speaker samples before he starting messing around with them?Other measurment datas uploaded from him are after modification.
Before modi, I don’t have it.
Yeah I can’t demonstrate that, but significant higher distortion at sample A was still exist..Right, so you cant actually demonstrate that there is a significant difference between the two speaker samples
Did it?Yeah I can’t demonstrate that, but significant higher distortion at sample A was still exist..
I said it WAS exist. Look that Sample A data. Almost 1% at 400% at 85dB. It isn't designed feature, is it?Did it?
Show me the measurements to prove it.
Show me a simple, on front axis, direct comparison between the two speaker samples
And this is 96dB data. Also 2nd HD is not problem while Sample A has problem at 85dB at the same level of distortion 2nd, 3rd both.We dont hide the issue, its shown in the measurements on the product page We show -46db / 0.5%
However we agreed with Purifi a better way to mitigate this issue. It can be improved further, but Im not going to discuss how I am sure you can understand why.
Jason, with respect you havent shown any appropriate measurements that demonstrate what you claim.I said it WAS exist. Look that Sample A data. Almost 1% at 400% at 85dB. It isn't designed feature, is it?
Measuring now is meaningless because he lowered the distortion.
Can you guess why that sample only have higher distortion? You said it would be modified sample, But I know it is not.
Several times I asked you, is it randomable?
I'm just saying what I know.
…
If the magnet - frame resonance is the main reason, how about adding damping sheet on the frame or adding pressure on the back(magnet). To be pressed by hard stuff when assmble the woofer.
…
Can you guess why that sample only have higher distortion? You said it would be modified sample, But I know it is not.
Several times I asked you, is it randomable?
I'm just saying what I know.
Xxxx has an agenda and a massive problem with me because I had the audacity to take him to task on his methods and lack of scientific rigour. …
Xxxx has a massive problem with Erin because Erin is doing a so much better ,,,
Note how Erin has engaged and interviewed many industry luminaries? .
Yep, no problem. We are overwhelmed with orders at the moment, but Im sure I can find time to chat