Final measure data
View attachment 214853View attachment 214854View attachment 214855
There was change in bass region as above
View attachment 214856
THD reduced a lot
View attachment 214857
As well as the THD, the multitone test result of the mid - bass frequency is also improved.
Finally all of the improvements were done, and “Sointuva WG - DC speaker gallery version” was safely returned to the owner’s hands.
So, to summarize, there is a problem caused by internal resonance which is worsened as it leaks through the gaps. But this could be drastically improved with sophisticated sealing at the binding posts and insert nuts, and additional absorption at the inside of the enclosure.
Last mystery:
Why did Erin unusually not include 86dB SPL THD data to Sointuva WG’s review?
- The End -
+ 01.07.2022
Regardless of the core problem of the Sointuva WG, I want to confess my mistakes and make things right.
It is true that I had strong suspicions about Erin at the time I was fixing issues with Sointuva WG.
And already one of my friends asked Erin about this question, and Erin gave him an appropriate answer... but I didn't believe it.
A cowardly excuse... I use templates for most of my measurements while using Klippel software.
This led to strong suspicions that only certain processes were missing from his measurements.
I doubted him without exact grounds, and he made no effort to believe it.
This is very wrong.
And this has resulted in many people being suspicious of Erin.
And also this totally ruined one man's happy weekend.
It's all my responsibility and my fault for people to doubt and slander him, at least on issues related to this thread.
I apologized to he timidly, and he asked me to post this apology on ASR for everyone to see.
Its contents are as follows:
Hello, Erin.
I am the person who posted that review on ASR.
I would like to sincerely apologize to you for this.
I should have asked and wrote about the missing 86dB SPL at 1m THD data in the first place, but I didn't.
And my stupid rashness totally ruined one man's pleasant weekend.
-----
Apart from this, you have always been a great help to me.
The data you've accumulated has given me the confidence of the public as well as cross-validation of my reviews by reviewing the same speakers.
I am fully aware of the difference between my measurement data and the anechoic chamber measurement data using Klippel NFS, and it's limitations.
But despite that, the THD of the Sointuva sample I received was higher than the 96dB data you measured, a symptom not found with other speakers I've run.
So, using the Klippel DIS module(as you know), I tested the harmonic distortion of that resonant band and found that it had a maximum value at about 85dB SPL at 1m.
Coincidentally, I also found that 86dB SPL data was missing from the Sointuva WG only in your review series.
That made me suspicious of you.
Explaining all of this may sound like an excuse for my atrocities, but I think all I can do is tell the truth.
Once again, I sincerely apologize.
So do you recommend purchasing a pair?
I don't want anyone innocent to suffer because of my faults.
I was wrong. Sorry to everyone.