re. Showroom Tweak: My precise experience auditioning the Persona 3F - detail...too much treble....get me out of here.
I found that the Paradigm Persona's that I listened to were really clear too -- that was my primary thought when I heard them (for about 2-3 songs). And I think if you listen 15 degrees off axis, which is not unusual if you face them straight instead of toeing them in, they are not as bright. Though I didn't look at the 15 degree measurements to check that.
I remember those. They were the only speakers that ever impressed me in a Best Buy “showroom”...and also the only ones I remember having waveguides similar to many of the positively reviewed speakers here.I still have a pair of those old Athena AS-B1 speakers that were sold in best buy.
To this day, not many low priced speakers sound as good as those. They were not perfect, but OMG for the price, they killed many higher priced brands easily.
I think the SPL increase in certain frequencies is by reducing out-of-phase cancellation from different parts of the dome. Given pistonic motion, the path length from parts of the dome to the listener/measurement microphone will be different. For break-up modes, who knows?“our exclusive Perforated Phase-Aligning (PPA™) Tweeter Lens that protects the delicate tweeter dome and acts as the Phase Plug, blocking out-of-phase frequencies for smoother, extended high frequencies with incredible detail and higher output.”
Patent: https://patentimages.storage.googleapis.com/a7/ae/38/425018c1b30bc9/US10003869.pdf
They even have a graphic showing that it increases SPL in the upper treble. They claim that dome tweeters cause phase mismatch as the round shape causes slight timing differences from HF sound radiated from it, which in turn causes phase mismatch, and that their lens corrects this.
To dumb it down:
• Bunch of holes on the grille.
• Solid for part of the grille (center)
• Holes are smaller the closer they are to the center.
No, blocking the center will causes blockage of ultra high frequencies, and we can see it dropping right as it reaches 20kHz, but that’s not a big deal. I would expect this grille to effect the off-axis, and we can pretty much see that as true.
KEF’s tangerine waveguide thing also is stated to increase SPL by blocking part of the tweeter; still kinda confuses me.
The Burmeister seems to be following the same model as Paradigm to improve off-axis. The B&W looks like it would have the opposite effect, having the larger holes towards the center. The Lexicon is just weird. Although, I suppose a proper model would be more informative than my uncalibrated eyeball.Perforated tweeter covers are in style.
Bowers & Wilkins for BMW and Volvo:
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Burmester for Mercedes-Benz and Porsche:
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Lexicon for Genesis:
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You can patent things that don’t work in practice, it’s just a claim.It's patented, so probably not just marketing, but how much it actually helps/hurts, who knows...
https://www.paradigm.com/en/technology-design/patented-perforated-phase-aligning-ppa-lens
The AM transistor radio I had in grade school had Speaker cover perforations, too.Perforated tweeter covers are in style.
Bowers & Wilkins for BMW and Volvo:
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Burmester for Mercedes-Benz and Porsche:
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Lexicon for Genesis:
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I suspect it has mostly to do with protecting the beryllium drivers.Hmzzz... Paradigm is using the perforated phase screen on the mid/woof and midranges of the high end series too.
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re. Showroom Tweak: My precise experience auditioning the Persona 3F - detail...too much treble....get me out of here.
But did it have stylish concentric designs and the light show from a Kia Soul?The AM transistor radio I had in grade school had Speaker cover perforations, too.
Looks like she got caught up in one of those banquet table covers:So folks know what we are talking about:
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My previous HT setup was having the C-6 as front, and AC-300 as center and surrounds. I still have the C-6 in my family room in a stereo setup. When I have time, I will run some REW to see how they fare, but I think they're quite decent.My first good speakers were Energy C-6 and C-2 speakers. I would be curious how they measured, but I would guess pretty well.
Yes and no.But did it have stylish concentric designs and the light show from a Kia Soul?![]()
It’s one of the great looking speakers I am tempted to buy for its look only, with fixable tonality it seems quite some ppl will still go for look
A (hopefully not too dumb question):
Looking at this speaker and comparing it to say, the Revel M105, one thing that jumps out to me is that the sound power DI curves are relatively different, with the paradigm looking smoother overall. The Revel looks better on on-axis, listening window, and PIR, but has a much more pronounced dip in the sound power DI from 2-5 khz.
Could it be that paradigm is designing for this and/or prioritizing this over the on-axis response?
I lack the expertise to fully understand the trade-offs here (other than the relatively obvious more high frequency energy), but it seems like somewhere in there is an interesting discussion.
Technically speaking:“our exclusive Perforated Phase-Aligning (PPA™) Tweeter Lens that protects the delicate tweeter dome and acts as the Phase Plug, blocking out-of-phase frequencies for smoother, extended high frequencies with incredible detail and higher output.”
Patent: https://patentimages.storage.googleapis.com/a7/ae/38/425018c1b30bc9/US10003869.pdf
They even have a graphic showing that it increases SPL in the upper treble. They claim that dome tweeters cause phase mismatch as the round shape causes slight timing differences from HF sound radiated from it, which in turn causes phase mismatch, and that their lens corrects this.
To dumb it down:
• Bunch of holes on the grille.
• Solid for part of the grille (center)
• Holes are smaller the closer they are to the center.
No, blocking the center will causes blockage of ultra high frequencies, and we can see it dropping right as it reaches 20kHz, but that’s not a big deal. I would expect this grille to effect the off-axis, and we can pretty much see that as true.
KEF’s tangerine waveguide thing also is stated to increase SPL by blocking part of the tweeter; still kinda confuses me.