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Multi-Way Conventional loudspeakers with crossovers

Some speaker driver measurements...
Some speaker driver measurements...
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Old 8th April 2021, 10:36 AM   #1271
Oneminde is offline Oneminde  Sweden
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Absolutely, 1,5kHz is not unthinkable as the XO target.
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Old 8th April 2021, 01:02 PM   #1272
454Casull is offline 454Casull  Canada
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Quote:
Originally Posted by TMM View Post
In most of my designs i'm at about 1/2 wavelength CTC, so the response only gets ugly around Fc for sound directed 90degrees up and down (straight at the roof and floor), which doesn't have a direct reflection path to the listening position anyway in most listening spaces.
Perhaps this could even be a good thing, if you have low ceilings or are able to use this to mitigate the on-axis floor bounce dip.
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Old 4th May 2021, 09:31 AM   #1273
HiFiCompass is offline HiFiCompass  Ukraine
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The review of the 8-Ohm version PTT6.5W08-01B (new name is PTT6.5X08-NFA-01) of the popular long-stroke midwoofer PURIFI PTT6.5W04-01A

Purifi PTT6.5W08-01B (PTT6.5X08-NFA-01) | HiFiCompass
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Old 4th May 2021, 10:18 AM   #1274
ttan98 is offline ttan98  Australia
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Quote:
Originally Posted by HiFiCompass View Post
The review of the 8-Ohm version PTT6.5W08-01B (new name is PTT6.5X08-NFA-01) of the popular long-stroke midwoofer PURIFI PTT6.5W04-01A

Purifi PTT6.5W08-01B (PTT6.5X08-NFA-01) | HiFiCompass
Impressive measurements do you think it worth the money you pay for?
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Old 5th May 2021, 01:27 PM   #1275
diyiggy is offline diyiggy
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the bill is a short stroke with that driver...
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Old 5th May 2021, 02:41 PM   #1276
HiFiCompass is offline HiFiCompass  Ukraine
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Quote:
Originally Posted by ttan98 View Post
Impressive measurements do you think it worth the money you pay for?
Yes, of course
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Old 10th May 2021, 12:08 PM   #1277
tktran303 is offline tktran303  Australia
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I rolled my own, and can verify with some crude measurements the ridiculously low distortion from this driver. But speaker design is 90% about crossover design, and Rick of Selah Audio knows his stuff here…

If the target is a speaker than can hit 100dB from 20Hz to 20Khz a 1/2 cut speaker, 15-at distortion levels previously unheard of, this will do it…

Selah Audio Purezza Bookshelf Speaker Review
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Old Yesterday, 02:02 PM   #1278
HiFiCompass is offline HiFiCompass  Ukraine
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The measurements of the tiny "Revelator" ScanSpeak D2104/712000 tweeter:

ScanSpeak D2104/712000 "Revelator" | HiFiCompass
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Old Yesterday, 02:15 PM   #1279
Pida is online now Pida  Czech Republic
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HifiCompass, thank you for that one. I was surprised ith your 3/5 stars rating, but after seeing the measurements I understood. I wonder what is wrong with that driver as distortion measurement is not what I am used to from Scan Speak tweeters. For now it seems better to stay away from this one, especially for that money, and better to take D2004. Not only its distortion measurement is excellent, but it has very small flange and I value that a lot.

Last edited by Pida; Yesterday at 02:20 PM.
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Old Yesterday, 02:45 PM   #1280
HiFiCompass is offline HiFiCompass  Ukraine
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I think, the tweeters that cost $385/pair have no rights to have such rugged frequency response and distortion profile. I'm disappointed, because waited they would continue nice performance of great SS tweeters D2904, D3004, D2004. If it had a ceramic, beryllium or dimond dome, it could be forgiven. But it has a regular soft dome and there are too many competitors at that price level.
The second tweeter from a matched pair had even worse distortion. I always publish results for a better sample.

Last edited by HiFiCompass; Yesterday at 02:50 PM.
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