Here is a bolt torque comparison test.
This is one of the things many of you have been wondering about.
"Is it true that it changes with the degree of torque on the bolt? If so, how much?"
After an A/B comparison test, the speaker owner gave me Alan's message.
"Did you overtighten the bolts?"
Of course it wasn't.
Because I didn't do any manipulations without the permission of the speaker owner.
And at the time we knew Alan was the supreme authority on this speaker and its knowledge, so we did as directed.
I tightened the woofer, passive radiator and tweeter assembly.
Anyway, here are the results.
We can definitely notice an increase in 3rd harmonic distortion at 380hz.
Let's compare the two data by overlapping them.
Alan and Purifi were right.
However, the peak is about -65dB.
Of course, I'm not saying this doesn't affect the condition of the speakers.
First, let's move on to
Nearfield measurement of passive radiators.
Let's compare the two data by overlapping them.
Can you spot any significant differences?
Did I break the speaker? using bolts?
I admit the facts about 380hz among your comments.
Tightening the screwdriver strongly may increase distortion.
But, at least in my experiments, it was way too small.
You are right.
You sent your speakers in 'perfect' condition.
But I tightened the volts arbitrarily, and it boosted the driver's 3rd harmonic distortion to -65dB (5V) level.
If so, I ask again.
Why do your 'perfect' speaker shows more than 1% harmonic distortion at 85dB SPL at 1m?