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Multi-Way Conventional loudspeakers with crossovers

Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way?
Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way?
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Old 20th July 2019, 05:26 PM   #1391
silverprout is offline silverprout  France
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Quote:
Originally Posted by Ro808 View Post
Your ingenuity is impressive!
When i entered internet in the nineties, people were like that

Enthusiastic and hopeful
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Last edited by silverprout; 20th July 2019 at 05:30 PM.
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Old 20th July 2019, 05:34 PM   #1392
Ro808 is offline Ro808  Netherlands
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Quote that may shed a light:

"One might ask why on Earth someone would do such a thing. Yet rest assured that there’s a number of perfectly valid reasons. As Vladimir explains, in terms of absence of an enclosure, it is almost obvious. Internal standing waves, reflections which interfere with driver cones, resonances, energy storage, compression, time domain (phase) distortions and so on are gone when the box itself is gone. The sound is radiated solely with drivers and not with enclosure or its baffles. The other important feature of a loudspeaker without a baffle is lateral radiation absence of it. One doesn’t have nearby walls, floor or ceiling radiation, which leads to less room resonances. Hence it’s for the best to picture Bespoke P15 as a somewhat OB alike design, yet pushed even further in the box-free direction. The downside? Since there’s no pressure built-up in a resonant chamber, bass drivers have to be big and there’s no way around it.
Reflector Audio Bespoke P15 is different from typical OB products not only because it doesn’t sport a baffle at all. Its four 15″ long-throw (18 mm of excursion from peak to peak) paper cone woofers aligned in a four-leaved clover shape are inverted. Yes, their membranes fire directly on a wall in front of a listener and that’s very unusual. Here Vladimir chimed in again. He explained that the inversion itself was done in order to more closely approximate all four big drivers’ acoustic axis. The specific angles of said transducers were introduced to focus sound radiation in space at 1.2m in the Bespoke P15 case and from that point their coherence is achieved. These angles translate to increased sound efficiency radiation forward, which yields improved adaptation and an acoustic system performance in problematic listening rooms. This is what Roland Janevich’s patented invention is all about exactly.

The manufacturer’s suggestion is that a minimum distance from a speaker to a listening spot should be no less than 2.2 m. As far as space behind our Latvian dish goes, 0.5 m or more is advised."
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Old 20th July 2019, 05:44 PM   #1393
Ro808 is offline Ro808  Netherlands
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Quote:
Originally Posted by silverprout View Post
When i entered internet in the nineties, people were like that

Enthusiastic and hopeful
Yes, I know.
Nowadays, we cry about all the beautiful people on Instagram.

Last edited by Ro808; 20th July 2019 at 06:05 PM.
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Old 20th July 2019, 05:49 PM   #1394
AllenB is online now AllenB  Australia
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Was the quote meant to be taken seriously?
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Old 20th July 2019, 06:22 PM   #1395
Ro808 is offline Ro808  Netherlands
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It's from an online hifi magazine, so I would suggest to read between the lines.

Just to be clear: personally, I am not excited about the concept.
However, it seems to have piqued the interest of my fellow countryman.

Last edited by Ro808; 20th July 2019 at 06:51 PM.
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Old 20th July 2019, 06:22 PM   #1396
silverprout is offline silverprout  France
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Quote:
Originally Posted by Ro808 View Post
Yes, I know. Nowadays, we cry about all the beautiful people on Instagram.
I don't know what is instagram
I stay alone with my gigantic low-excurtion high-efficiency OB coax woofers, and stay a little dubitative about why this solution is not used by anyone but me
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Old 20th July 2019, 10:04 PM   #1397
tuyen is offline tuyen  Australia
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Interesting thread so far. Some great useful content on here.

I have a pair of budget horns coming - P audio ph-4220 (http://www.paudiothailand.com/upload...ts/PH-4220.pdf) and would like to ask if it will be suitable match with what seems like best 1” CD for treble extension and quality (at reasonable price) the Faital Pro HF10AK. I like airy and ‘open’ treble. Didn’t think many (if any) ‘PA’ CD tweeters could do this.

I was planning the above horn combo with a JBL 124a 12” woofer (similar spec to jbl 2203h - http://www.jblpro.com/pub/obsolete/2203h.pdf ) which I have sitting in a decent sized ported box unused. This unit can output some decent deep and quite punchy bass (in my small room).

Was thinking crossover around 1khz. I typically like to notch the 1khz area down on an eq so perhaps cut the jbl even lower.. not sure as yet.

Any thoughts most appreciated.
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Old 21st July 2019, 11:40 AM   #1398
AllenB is online now AllenB  Australia
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Quote:
Originally Posted by Ro808 View Post
It's from an online hifi magazine, so I would suggest to read between the lines.

Just to be clear: personally, I am not excited about the concept.
However, it seems to have piqued the interest of my fellow countryman.
Thank you. I recall getting excited myself about the idea. What was it 10, 20 years ago I can't remember. Of course I thought about it and concluded that one doesn't escape the world that easily.
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Old 21st July 2019, 01:52 PM   #1399
phivates is offline phivates  United States
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Just throwing away all that power, and witnessing all that excursion, and reveling in the rhetoric of how superior this extravagance is, has to be addicting. I can't afford it.
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Old 21st July 2019, 03:41 PM   #1400
Ro808 is offline Ro808  Netherlands
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Quote:
Originally Posted by tuyen View Post
Interesting thread so far. Some great useful content on here.

I have a pair of budget horns coming - P audio ph-4220 (http://www.paudiothailand.com/upload...ts/PH-4220.pdf) and would like to ask if it will be suitable match with what seems like best 1” CD for treble extension and quality (at reasonable price) the Faital Pro HF10AK. I like airy and ‘open’ treble. Didn’t think many (if any) ‘PA’ CD tweeters could do this.

I was planning the above horn combo with a JBL 124a 12” woofer (similar spec to jbl 2203h - http://www.jblpro.com/pub/obsolete/2203h.pdf ) which I have sitting in a decent sized ported box unused. This unit can output some decent deep and quite punchy bass (in my small room).

Was thinking crossover around 1khz. I typically like to notch the 1khz area down on an eq so perhaps cut the jbl even lower.. not sure as yet.

Any thoughts most appreciated.

Click the image to open in full size.

The 124A is a stunning woofer, provided the Alnico is recharged and the surrounds are fresh.
It's probably one of the best 12" woofers ever, as well as one of the best looking, if you ask me.
However, it's more akin to a hifi woofer than a pro woofer, which implies considerable attenuation of a horn/comp. driver.

You may consider an AMT or wg loaded dome tweeter.
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