edit: new discussion about issues related to drivers other than just only midranges;

https://www.diyaudio.com/community/...l-x-for-mid-ranges.376164/page-7#post-7703832

Hopefully this is the right subforum for this.

I have a question about the following,

So for loudspeakers there are basically three dominant factors creating distortion/non linear behavior.

There are some other factors, like cone break-up, compression of air etc etc, but for now I am not going to consider those.

So the BL(x) and Cms are both dominant for the lower frequencies, around the Fs up to roughly 2 x Fs.

From that point on the inductance Le(x) is starting to be the more dominant factor.

So let's assume we have a mid-woofer with a Fs around 50Hz.

We are gonna cross this driver (actively) around 100-120Hz (2nd order highpass)

At this point, as far as I understand, it's not really important anymore how (non)linear the Cms and BL(x) is, since the Le(x) is dominant here?

As long as we keep the cone excursion to a minimum, which is most cases is fine since most speakers will run into there max power at this point with a cone excursion of just 1-3mm or so.

https://www.diyaudio.com/community/...l-x-for-mid-ranges.376164/page-7#post-7703832

Hopefully this is the right subforum for this.

I have a question about the following,

So for loudspeakers there are basically three dominant factors creating distortion/non linear behavior.

- The non-linearity of the compliance (1 / stiffness), Cms(x)
- The non-linearity of the BL vs displacement curve, BL(x)
- The non-linearity of the inductance. Le(x)

There are some other factors, like cone break-up, compression of air etc etc, but for now I am not going to consider those.

So the BL(x) and Cms are both dominant for the lower frequencies, around the Fs up to roughly 2 x Fs.

From that point on the inductance Le(x) is starting to be the more dominant factor.

So let's assume we have a mid-woofer with a Fs around 50Hz.

We are gonna cross this driver (actively) around 100-120Hz (2nd order highpass)

At this point, as far as I understand, it's not really important anymore how (non)linear the Cms and BL(x) is, since the Le(x) is dominant here?

As long as we keep the cone excursion to a minimum, which is most cases is fine since most speakers will run into there max power at this point with a cone excursion of just 1-3mm or so.

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