Tell us more.
Point to a variety with sound absorbing properties; I don't see any.
When it does absorb, it will be frequency dependant and not absorb all audio freqencies; no absorbing material does.
Point to a variety with sound absorbing properties; I don't see any.
When it does absorb, it will be frequency dependant and not absorb all audio freqencies; no absorbing material does.
https://pdf.sciencedirectassets.com...=080f56575559025253&rr=8039b56e1850b8a3&cc=nl
This well documented survey gives the necessary information.
Conclusion is that only the "small granule" type has better properties than rockwool; a thicker layer of rockwool would equal a thinner layer of small granule aerogel sheet, so the aerogel sheet is good when room is restricted; otherwise just apply more rockwool or whatever "audiophile" stuff for the same absorbtion.
This well documented survey gives the necessary information.
Conclusion is that only the "small granule" type has better properties than rockwool; a thicker layer of rockwool would equal a thinner layer of small granule aerogel sheet, so the aerogel sheet is good when room is restricted; otherwise just apply more rockwool or whatever "audiophile" stuff for the same absorbtion.
Bro what thats little balls of a completely different material aerogel is a bunch of different material kinda like foam is a bunch of different materials research better I even gave you the correct material name can't make it much easier then that.
There are three types for the granule size: small, medium, large. Only the small granule type is interesting as medium and large granule is not better than rockwool.
See screenshot of aerogel compared with rockwool, and conclusion.
See screenshot of aerogel compared with rockwool, and conclusion.
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490 usd for a square foot half inch thick tile....
http://www.buyaerogel.com/product/airloy-x103-large-panels/
http://www.buyaerogel.com/product/airloy-x103-large-panels/
Hi Endo,
I understand you intend to assemble a dipole system the M142P and double T34B. I think this is doable, kind of Linkwitz Orion.
I will replicate the LX-521//NaO Note II-RS with the M142P, double M74B and double T25B. Following recommendation from Linkwitz/Kreskovsky, of using the drivers (in dipole) to two octaves max.
So, 250-1K for the M142, 1-4K for the M74, 4K up for the T25. I have no reason to use the T34B (which I'm using now) the T25 is much better for this concept.
Both M74B are used with the back covers removed in a custom airtight, slim chamber, this allows for a minimal dome separation for a better dipole behavior.
We made a device (in PPN) to measure the double M74 and it works perfect, no issues with impedance, FR or distortion.
I was satisfied with what I have today, Supravox 215RTF (250-800Hz), Volt VM752 (800-3K), T34B. But this is monopole from 800Hz and I wanted to change this. Besides, the new Bliesma domes are simply unique.
I understand you intend to assemble a dipole system the M142P and double T34B. I think this is doable, kind of Linkwitz Orion.
I will replicate the LX-521//NaO Note II-RS with the M142P, double M74B and double T25B. Following recommendation from Linkwitz/Kreskovsky, of using the drivers (in dipole) to two octaves max.
So, 250-1K for the M142, 1-4K for the M74, 4K up for the T25. I have no reason to use the T34B (which I'm using now) the T25 is much better for this concept.
Both M74B are used with the back covers removed in a custom airtight, slim chamber, this allows for a minimal dome separation for a better dipole behavior.
We made a device (in PPN) to measure the double M74 and it works perfect, no issues with impedance, FR or distortion.
I was satisfied with what I have today, Supravox 215RTF (250-800Hz), Volt VM752 (800-3K), T34B. But this is monopole from 800Hz and I wanted to change this. Besides, the new Bliesma domes are simply unique.
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Hi Endo,
I have paid a simulation to VCLLabs. The polar radiation of the double T34 is not as good as the double T25. The overall diameter of the T34 is too big to be used in dipole.
The T25 is a much better tweeter for this concept. Of course a small dipole TW is perhaps better but, for several reasons, I do not like them.
I have paid a simulation to VCLLabs. The polar radiation of the double T34 is not as good as the double T25. The overall diameter of the T34 is too big to be used in dipole.
The T25 is a much better tweeter for this concept. Of course a small dipole TW is perhaps better but, for several reasons, I do not like them.
T34B has excellent dispersion for the size as that was an important design goal; dispersion is actually as good as T25B.
Left T34B; right T25B.
Besides, dispersion in a dipole is a matter of design choice; more HF dispersion does not make a better dipole.
Left T34B; right T25B.
Besides, dispersion in a dipole is a matter of design choice; more HF dispersion does not make a better dipole.
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I'm really thinking about some crazy 4 way with T25B, M74B, M142A... no idea what to use for a woofer, like how is anything supposed to keep up? Probably something 18 inch is the only choice like BMS 18N862.
The 3 Bliesmas have pretty big overlapping zones. I would probably go with T34B and M142. And add a bunch of 12" for low frequencies.
Yeah... crossing from an M142 to an M74 (probably at 600 - 1000 Hz) does not really use the full capability of the expensive M142.
As for woofers, a pair of SB34NRXL75-8 or a pair of ScanSpeak 32W/8878T01. A pair of 12" woofers would be approximately equivalent to an 18" driver.
Looks like the latest Marten uses both M74 and M142 (OEM carbon fibre)
https://www.marten.se/the-new-coltrane-quintet/
https://www.marten.se/the-new-coltrane-quintet/
Oh - putting a metal plate in FRONT of an T25 ... it's great difference is that there is nothing in front of the membrane and surround ...
But the optics with the (horrible expensive) Cell lf drivers is pretty cool.
But the optics with the (horrible expensive) Cell lf drivers is pretty cool.
Hmm... if I had the money, I'd buy one just to use it in reverse with a compact tweeter inside the concavity, just to see how well it would work as a homemade coaxial. Looks like up to ~2 kHz could be workable in rear-firing.
HiFiCompass has Many questions answered
Might have to grab a pair before the tariffs kick in. Looks like Solen only has 2 left.
Might have to grab a pair before the tariffs kick in. Looks like Solen only has 2 left.
please, provide X pictures 😉
@hifijim : looking forward to have your feeling about the listening of the x2 SS vs the the SB34RNX.
Seems to me a logical choice w/o knowing more.