Investigating port resonance absorbers and port geometries

[b_force]

The web ist still full of comments like "never place your sub in the corner" I was astonished like this was something everyone would automatically agree on who is into hifi or high end.

I am always astonished that people just parrot absolute statements without even considering a femto-bit of context.

What I am even more astonished about, is that it seems to be like growing weeds, you also never know when and how it will pop-up.
Once you finally cleared one part, another part seems to be growing over again 🙁

 

[Freedom666]

Here Mr Jobst from Jobst Audio Germany measured in the near field some mm close to reflex port and loudspeaker cone. Orange line is the driver the other two are the two reflex ports.

He did that to compare with the ground plane measurement.

Here you see what I saw, too, while measuring a reflex port that it works pretty wideband and adds up really nice where the driver decays.

 

[Kravchenko_Audio]

I am always astonished that people just parrot absolute statements without even considering a femto-bit of context.

What I am even more astonished about, is that it seems to be like growing weeds, you also never know when and how it will pop-up.
Once you finally cleared one part, another part seems to be growing over again 🙁

I think you summed up most of audio. Copying. Very little innovation.

Polyester wadding inside cabinets. Everyone does it. Does it do anything? Does anyone measure what it does? Not effectively. When you do, you find it's nearly useless in the way it is being used. Just an example that I have extensive measurement experience with.