Could someone explain the effect of this crossover to me please.

[midrange]

The writer of the original article appears to have edited and changed the xover, perhaps at a later date, without altering the original script.

 

[Galu]

Thus negating the content of the article!

 

[markbakk]

Can we have a cheerful laugh about this post from a rather foolhardy specimen of Homo sapiens? Homo ludens probably is more appropriate. This post is almost nine years old!

 

[system7]

No it's not Mark. The join date is 9 years old, but m'leaned friend Midrange posted this stuff yesterday:

https://www.diyaudio.com/forums/members/midrange.html

🙂

 

[midrange]

Well, this thread might be only a couple of days old, but it has outlived it's usefulness.

I felt I owed it to you all to try to read the 19! pages of the original thread where the xover came from (I got blocked after 12 as a non member of the site) to see if the rationale of the xover was explained. It wasn't. He goes on about how this xover is a vast improvement of the one described in the text!

A final parting shot: the original attenuating series inductor for 2 drivers in series was 0.05mH. That is not a misprint. He was asked. Enough.

 

[Galu]

Do I detect some confusion, Steve?

To be clear, markbakk appears to be referring to the author of the stereonet post - which is, indeed, 9 years old.

 

[AllenB]

First this..

we put the top two of them in series and run them fullrange.
we take the other two, connect them in series, but run these through a 0.05mH inductor. then connect these pairs in parallel to the amp.
this means that at high frequencies (where the frequency response is higher) only the top two are making sound. then when we go lower to the midrange, the other two kick in, and from there down it's all 4 drivers contributing.
this rounds out the sound, giving a nice balanced response.
also, in the highs the impedance is 16 ohms, and when the other two kick in it drops to 8 for the rest of the frequency range.

how do we make bass?
this comes from the cabinet, and i'm not entirely sure why it works, but it does.
we start by arranging the drivers in a vertical line, making speakers about 90cm tall.
then we make the cabinet for them about 600mm deep, and we leave the back panel open, as this is an open baffle design.

Then this.

these drivers aren't for people who like measurements, they're for people who like music.

The crossover you posted was the latest version as at the time of posting. It seems that this designer has taken a freestyle approach to the crossover. I'm not sure we'll find out exactly why it sounded as it did, only that OP was impressed enough to share it.


BTW, it's a shame that Altronics isn't in business anymore.

 

[wintermute]

Since when is Altronics not in business? I went there a couple of weeks ago....

Tony.

 

[AllenB]

I was wrong.🙂 I followed the old link and got redirected.

It seems they're in Duck St, that'd be the Auburn Home Centre. Just up from the MCAS.

 

[wintermute]

Yes they are across the road from the Auburn Home center 🙂

Tony.