Looking for a woofer to anchor a 3-way and I stumbled across these: 6501 and 6502. Voice Coil magazine also tested them. I would only use the 6.5" for a center channel, but they have an 8" coming, I was given a very tentative date of June '22. XBL2 motors are known for their very low harmonic distortion in the bass, and these are a good example. But after reading a lot of the Purifi info, I took a closer look at some of the Klippel results like BL flatness and especially symmetry, and Le(x) tilt. These appear to be solving some of the same issues that Purifi identified, like FFM distortion. Now I'm not comparing the two, the usage case different, and Purifi obviously went much further in nailing down the behavior of the driver. But it does seem these are performing very well in the ways that audibly matter vs most other manufacturers. Thoughts?
I am interested in the XBL2 patent, for how the voicecoil and magnetic system are constructed. Does anybody know if the patent is free to use now? Since Misco is using it, but I believe, I once checked the patent, and it seemed, at that time Tymphany owns it today?
The E150HE was tested by Vance Dickason in Voice Coil magazine December 2021 (I have a copy).
I think we can extrapolate the results from there.
But it would be nice to see actual results.
The little brother pretty nice for its size, not great as a full mid-woofer.
That was to be expected I think.
As for the Misco drivers, I wasn't that blown away by the results;
https://audioxpress.com/article/test-bench-the-bwx-6502-midbass-from-misco-s-bold-north-audio-line
Depending how you gonna use the woofer, but the xmax is about 9mm
For subwoofer usage we can pick 20%.
A little to much 3rd order harmonics.
On the other hand, it's quite low.
https://audioxpress.com/article/test-bench-the-bwx-6502-midbass-from-misco-s-bold-north-audio-line
Depending how you gonna use the woofer, but the xmax is about 9mm
For subwoofer usage we can pick 20%.
A little to much 3rd order harmonics.
On the other hand, it's quite low.
I like that this driver was designed in assembled in USA.
I think it’s fair to compare to other XBL^2 split gap motor geometry drivers like to the DIYSG Anarchy which comes in box 5” and 6.5” varieties in 8 has 4 ohms.
https://www.diysoundgroup.com/anarchy7-8ohm.html
what I don’t like is it doesn’t look like a soft parts has been optimised for the smoothest response in the mid band. The clue is in the impedance trace. 2nd, CMS(x) seems to be very important.
The data sheet for the one with the phase plug suggest crossover frequency of 4Khz (!) using a textbook filter 2nd order electrical filter. I think this perpetuates old ideas and doesn’t really advance understanding of important issues like baffle- step compensation and polar response
Dayton Audio E15/80HE-44 look competitive with the Anarchy from what I’ve seen.
I think it’s fair to compare to other XBL^2 split gap motor geometry drivers like to the DIYSG Anarchy which comes in box 5” and 6.5” varieties in 8 has 4 ohms.
https://www.diysoundgroup.com/anarchy7-8ohm.html
what I don’t like is it doesn’t look like a soft parts has been optimised for the smoothest response in the mid band. The clue is in the impedance trace. 2nd, CMS(x) seems to be very important.
The data sheet for the one with the phase plug suggest crossover frequency of 4Khz (!) using a textbook filter 2nd order electrical filter. I think this perpetuates old ideas and doesn’t really advance understanding of important issues like baffle- step compensation and polar response
Dayton Audio E15/80HE-44 look competitive with the Anarchy from what I’ve seen.
The Anarchy has been tested by Vance Dickason as well, although has been a while (older test method as well);
https://audioxpress.com/article/test-bench-exodus-audio-w06-017r-anarchy
For the 10% criteria the xmax is limited to 8.5mm
If we take the 20% criteria (for subs) the xmax is limited to 10mm.
So still lower than the given 12.5mm
https://audioxpress.com/article/test-bench-exodus-audio-w06-017r-anarchy
For the 10% criteria the xmax is limited to 8.5mm
If we take the 20% criteria (for subs) the xmax is limited to 10mm.
So still lower than the given 12.5mm
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b_force> you don't seem much impressed, but what are all the other woofers that are so much better to anchor a 3-way? And if we look from a perspective informed by the Purifi literature, I ask again, show me all the woofers with so much better performance as a woofer? Have you looked at any of the Purifi literature? It goes quite beyond simple Klippel definitions of the xmax.
He likes bigger woofers, LOL.
to be honest it’s easily to be hypercritical.
I find myself sometimes hypercritical too, eg. I 3 “subwoofers”
But really, Misco and Dayton Audio are nice technical developments and among the best woofers, for their size.
to be honest it’s easily to be hypercritical.
I find myself sometimes hypercritical too, eg. I 3 “subwoofers”
But really, Misco and Dayton Audio are nice technical developments and among the best woofers, for their size.
yeah I like big woofers a lot too, this project is more of a typical design in that regard though. Even going to 8" is pushing WAF for many.
I have some Dan Wiggins 6.5in aluminum cone woofers (custom OEM ones). I stuck them in my TL designed for PTT6.5 and it was a drop in fit and they work like a charm. I like the sound a lot. Very low distortion and an aluminum mid bass sounds better than paper IMO. Nice driver.
This is how they sounded using the XO I developed for the PTT6.5 and a RAAL ribbon. Not bad for random XO.
This is how they sounded using the XO I developed for the PTT6.5 and a RAAL ribbon. Not bad for random XO.
No, these speakers were originally discussed in this thread when I made them for the PTT6.5 and RAAL.
https://www.diyaudio.com/community/threads/raal-70-20xr-and-ptt6-5-compact-tl.356906/
I stopped work on them because I ended up selling the variant with the RS28F in a waveguide to the cabinet maker who made the TLs. He liked them too much. So I didn’t have the PTT6.5 anymore to play with.
https://www.diyaudio.com/community/threads/raal-70-20xr-and-ptt6-5-compact-tl.356906/
I stopped work on them because I ended up selling the variant with the RS28F in a waveguide to the cabinet maker who made the TLs. He liked them too much. So I didn’t have the PTT6.5 anymore to play with.
Brandon,
After looking at dozens of Klippel measurements over the last decade, it looks like CMS(x) had been flying under the radar.
What are you preliminary requirements?
I think there’s only 2 two consider
Dayton RS225-8 if you’re on a budget and ScanSpeak 8857T if you’re not.
$/Vd I haven’t found a woofer better than the RS225. It just needs a bigger cabinet to get there (1.5 cu ft vented)
2 per side is very good in 80L-100L
the Scan may soon be supplanted by the Purifi 8”…
After looking at dozens of Klippel measurements over the last decade, it looks like CMS(x) had been flying under the radar.
What are you preliminary requirements?
I think there’s only 2 two consider
Dayton RS225-8 if you’re on a budget and ScanSpeak 8857T if you’re not.
$/Vd I haven’t found a woofer better than the RS225. It just needs a bigger cabinet to get there (1.5 cu ft vented)
2 per side is very good in 80L-100L
the Scan may soon be supplanted by the Purifi 8”…
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