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Hello,

If I listen to some music, I can hear that some frequencies (I don't know if it is one or several) are louder than normal, strident and unpleasant. It is easier to hear if I turn off the...

Hello,

I did't tried to tackle the problem with measurements because I find the measures too difficult to interpret. I find it easier to knock on the panels and hear the sound it produces. Or put...

Hello,

I used MDF with the same thickness but 20% lighter that the original's. I didn't put a gasket between the waveguide and the box (I don't know what it looks like). I used MDM-4 instead of...

Hello,

I did the construction minutely. The panels and the braces were firmly attached. I've made a lot of other boxes before this one so maybe I've done a mistake but it would surprise me.
...

Hello,

Thank you for your responses. I want to be clear: I'm not saying that JBL speakers do ring. They use an interferometer to design their boxes, so if they were ringing, they would detect and...

JBL Speakers boxes are just made of MDF with very few internal braces compared to many other hifi brands. How, in these conditions do they not ring like bells?

I wonder whether JBL does "glue" the...

Why this question? Is it important?

There is already some grooves on the panels for that purpose. We can see them on the inner face of the left panel. So I doubt that it is for this reason. But maybe.

Hello,

Do someone know the purpose of these pieces ? Do they serve for the mounting of the panels ? Or are they part of the bracing to control the modal behavior of the enclosure ?

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I'm quite confused because I've read that the fiber glass wool can emit particles that can enter the voice coil of the woofer. I wonder if an acoustic fabric placed on the fiber glass wool could stop...

Thank you. Do you know what thickness is used? One or two inches?

Does someone know what damping material is used inside the genuine M2? And it's thickness? Is it 1" fiberglass or something else? Thank you

On this picture, that I have brightened, we can see the gasket on the bottom left-hand corner. It seems that it is fairly thin and not glued to the baffle.

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But this doesn't answer to my...

It seems that it is not the case in the genuine M2. We can see this on this picture, on the bottom right-hand corner.

https://i.ytimg.com/vi/jDTLZCNzhFQ/maxresdefault.jpg

First, I thought that...

Does someone know what is the proper way to mount the waveguide of the M2 on the baffle? I have drawn a few possibilities. Is it one of these?

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I have drawn the contact surfaces in...