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Multi-Way Conventional loudspeakers with crossovers

TB new line of Coax FR drivers
TB new line of Coax FR drivers
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Old 25th June 2018, 10:03 PM   #21
onni is offline onni  Sweden
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Quote:
Originally Posted by jamayfie View Post
There's a suggested enclosure and crossover posted on the Tang Band website for the W6:

SUG2-25 - 6.5" 2 Way Coaxial Bookshelf Enclosure Suggestion - TB SPEAKER CO., LTD.

Looks like a Kef LS50. Interesting curved port tube....
The curved port is quite common to accomodate a longer tube than what would fit straight.

I find the XO to be a bit weird though... No lowpass for the woofer? The notch only affects the impedance as far as I can see. When I sim it with the factory curves i get this (still without baffle step):
SUG2-25 - W6-2313.png

The page says that the XO-point is 3 kHz, but that looks a lot higher than that...

/Anton
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Old 26th June 2018, 03:19 AM   #22
perceval is offline perceval  Taiwan
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Yep, I tried the given XO, and it doesn't look great.

I've got the cleanest drop from both drivers when crossing at 1.45kH.
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Old 26th June 2018, 05:16 AM   #23
diyaudnut is offline diyaudnut  United States
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Still not sure why most of these co-axials are built at this size. Having such a low crossover for the tweeter makes little sense in a coaxial configuration.

Sure these are great for some near field monitors.
But personally, i feel an optimal application for coaxial would be upper mid + tweeter in a 4-way. A 3.5" or 4" mid-range covering from 700-5kHz coaxial with a small tweeter from 5kHz and above.

1. C2C is not a problem even at that high frequency XO
2. Crucial frequency range is covered in a single driver without XO
3. Low excursion needed from the mid-range driver means that the surround can be optimally designed for low diffraction.
4. Cone profile can be designed for optimal wave-guide loading for the tweeter
5. Low excursion also means this wave-guide is stable wrt to the tweeter and avoids distortions coaxials may be more prone to.

Granted this may be a limited application.

Last edited by diyaudnut; 26th June 2018 at 05:19 AM.
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Old 26th June 2018, 05:21 AM   #24
perceval is offline perceval  Taiwan
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Quote:
Originally Posted by diyaudnut View Post
But personally, i feel an optimal application for coaxial would be upper mid + tweeter in a 4-way. A 3.5" or 4" mid-range covering from 700-5kHz coaxial with a small tweeter from 5kHz and above.
Well, if you've followed the link from the first post, you would notice that they also have a 3" and a 4" coax... so you could do what you feel like doing.
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Old 26th June 2018, 10:30 AM   #25
PANDINUS is offline PANDINUS
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Hi Onni,
I used the data from you. Both LspCAD and VituixCAD give other results than your chart. The phases are not aligned to each other. I do not know where the bug is.


Quote:
Originally Posted by onni View Post
I started with first order filters, a Zobel and an L-pad and got this:
Attachment 688750

That's not so bad, right? I haven't added baffle diffraction yet though.

/Anton
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File Type: jpg TB 6,5 xover.jpg (155.4 KB, 696 views)
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Old 26th June 2018, 10:45 AM   #26
PANDINUS is offline PANDINUS
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I see it. In your published frd files, phase data are not included.
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Old 26th June 2018, 11:24 AM   #27
onni is offline onni  Sweden
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Quote:
Originally Posted by PANDINUS View Post
I see it. In your published frd files, phase data are not included.
Correct! I extracted phase within Xsim.

/Anton
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Old 26th June 2018, 12:28 PM   #28
perceval is offline perceval  Taiwan
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I got this, using both frd and zma files I made from the TB graph.
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File Type: png Screen Shot 2018-06-26 at 7.27.48 PM.png (150.4 KB, 671 views)
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Old 26th June 2018, 04:27 PM   #29
PANDINUS is offline PANDINUS
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Quote:
Originally Posted by onni View Post
Correct! I extracted phase within Xsim.

/Anton

it's not there. Phases -0
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File Type: jpg frd, zma TB 6,5 COAX.jpg (77.5 KB, 592 views)
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Old 26th June 2018, 04:29 PM   #30
Patrick Bateman is offline Patrick Bateman  United States
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Quote:
Originally Posted by system7 View Post
I think we might all need a new hobby.

These coaxial drivers are getting so good, that there really isn't much more to do!

This is effectively a three-way with a small footprint.

The $500 Elac Uni-Fi UB5 designed by budget specialist Andrew Jones of Pioneer fame: Uni-Fi UB5 Elac

One of my favourite Tech reviewers, Patrick Norton gushes greatly over it in an interview with Andrew: YouTube

Not many people know this, but my avatar is, in fact, Robert Heron, who had a great partnership with Patrick on various tech websites. Get your geek on!
I heard one of the ELACs back to back with Kefs LS50 and I think it's a little bit better. Really great speaker, especially at that price.
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