Whether the D2 driver is a made by BMS or not, is food for some controversy. I posted earlier the driver is a BMS OEM, but I have not been able to find an 'official' acknowledgement, nor a denial. Which is unlikely to happen anyway, because OEM suppliers are seldom mentioned by JBL, or every other manufacturer for that matter. It is a fact some JBL labeled compression drivers are BMS products. Components from these BMS and JBL labeled drivers are interchangeable. The only difference is the price tag; 'official' JBL replacement diaphragms are up to 50% more expensive compared to those carrying a BMS label.
Though the D2 driver is fundamentally different from the BMS coaxials it seems logical to outsource production of these drivers to a specialist in this field for economic reasons (costs of tooling etc.).
Though the D2 driver is fundamentally different from the BMS coaxials it seems logical to outsource production of these drivers to a specialist in this field for economic reasons (costs of tooling etc.).
In this case I was darn lucky getting hold of a pair. But mybe they will be getting available again. The D2 is not just used for the M2 monitor but also for large format line arrays. It is possible that the ones for the M2s are selected but AFAIK both, the M2 and those line-arrays use basically the same driver.
IIRC those drivers used in the Everest shouldn't be available to the public either - still they do emerge on ebay etc once in a while.
Regards
Charles
IIRC those drivers used in the Everest shouldn't be available to the public either - still they do emerge on ebay etc once in a while.
Regards
Charles
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JBL D2430's are also used in JBL's VTX series and are availabe on ebay, prices starting at 350 USD.
The Be drivers are far more 'exotic', expensive and highly desirable. Here's a comparison between the Radian Audio 951PB/Truextent Be4016 vs JBL 476Be from the DD66000 Everest (in German):
http://behringer-electric.de/files/...hstest 475BePB_vs_2426H_vs_2426_RadianAlu.pdf
The Be drivers are far more 'exotic', expensive and highly desirable. Here's a comparison between the Radian Audio 951PB/Truextent Be4016 vs JBL 476Be from the DD66000 Everest (in German):
http://behringer-electric.de/files/...hstest 475BePB_vs_2426H_vs_2426_RadianAlu.pdf
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Some says than the M2 is better than the 6600 !
Off topic, drived 500 Kmh today Under the rain, to wake up sometimes
, I playbacked this little Belgizn Soul Gem : https://www.youtube.com/watch?v=oiqRFvUOUH0
I test now my home hifi to listen to the difference with the car
!
Off topic, drived 500 Kmh today Under the rain, to wake up sometimes
, I playbacked this little Belgizn Soul Gem : https://www.youtube.com/watch?v=oiqRFvUOUH0I test now my home hifi to listen to the difference with the car
!Unfortunately this comparison is not for the drivers that you mentioned. It is actually comparing the original JBL2426 with a JBL2426 equipped with a radian aluminium dia and the Radian 475BePB with beryllium dia.
The JBL476Be is a completely different beast.
But the tested Radian does indeed look very interesting.
Regards
Charles
Excuse me, must have copied the wrong link, this should be the correct one:
http://www.behringer-electric.de/fi...nt/Vergleichstest 951PbTrExt4016 vs 476Be.pdf
http://www.behringer-electric.de/fi...nt/Vergleichstest 951PbTrExt4016 vs 476Be.pdf
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Some says than the M2 is better than the 6600 !
Off topic, drived 500 Kmh today Under the rain, to wake up sometimes
I test now my home hifi to listen to the difference with the car
How about this one for driving in the rain?:
https://youtu.be/AI40I6uNHN4
Nice Loundge music, subscribed !
listened also this : https://www.youtube.com/watch?v=HS8J_Oky5cw
+ https://www.youtube.com/watch?v=4C1_1aQtiSA just after !
Totally traumatised by the rain : France is a little flooded these last days
listened also this : https://www.youtube.com/watch?v=HS8J_Oky5cw
+ https://www.youtube.com/watch?v=4C1_1aQtiSA just after !
Totally traumatised by the rain : France is a little flooded these last days
Since I heard an high efficienty with the TAD ET-703 (Be super Tweeter )which was quite NOT THERE in the treble, making the voices totaly natural, I ask myself tons of question about the integration of the upper 5 K Hz range !
Seems the Beyrillium material is maybe important ! Voices have more Fundamentals on a large scale than important harmonics....
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Imho, the reason is the lack of energy in the top octaves ( power response, i know i am a maniac and it's my leitmotiv) of horns and most dome tweeters.
One big suprise for me was hearing a speaker ( Nestorovic top model) with a ribbon firing backwards, to the rear wall and ceiling. It could be connected or left unconnected and the result when on was simply: AIR!
Pros and cons of directivity?
One big suprise for me was hearing a speaker ( Nestorovic top model) with a ribbon firing backwards, to the rear wall and ceiling. It could be connected or left unconnected and the result when on was simply: AIR!
Pros and cons of directivity?
It's possible indeed, Hiraga tilts often the tweeters at more than 45° ! But I surmise this guy to know what he is making and listened not only tons of speakers but also live musical events !
We are all a lot biased by our subjective experience while benchmarking a speaker to an other one ! Each time I come back from a natural (non amplified) acoustical concert, I cry ! Not only because it was good, but also because speakers are far what ever the price (when you spend 100 k in a speaker this is more the brand which is in the Nirvana than your ears... (Oh je m'égare... en même temps que les speaker in the garage !)
We are all a lot biased by our subjective experience while benchmarking a speaker to an other one ! Each time I come back from a natural (non amplified) acoustical concert, I cry ! Not only because it was good, but also because speakers are far what ever the price (when you spend 100 k in a speaker this is more the brand which is in the Nirvana than your ears... (Oh je m'égare... en même temps que les speaker in the garage !)
dynamics can be reproduce just fine by small speakers. its all about how loud small speakers can go before breaking up.
Ive yet to hear a faster speaker then a small two way. to me, dynamic is fast transient and proper timing, something that doesnt ssem to be about how big or small a speaker is or how loud it can go. after living with big 3 way with 12 inch per side and small ls35a type speaker and everything in between, I must say I dont miss big speakers. Midrange reproduction and clarity of tone is really what music is all about to me.
If dynamics is viewed as a technical parameter showing the maximum span between the faintest and the loudest sounds that can be reproduced then you are definitley right.
But there is a party pooper called perception and this dictates, that there is only one loudness level that gives accurate reproduction of the original eventr: The level the performance was originally played at (or intended to be played).
And this will demand for systmes that can reproduce lifelike peaks without breaking a sweat.
My next speakers will be able to reproduce peaks at around 130 dB(le20) each. Will I ever listen at that level ? Probably not. But speakers of that kind play with an authority even at lower levels that small ones can't.
I do also have small speakers in my collection and I must say that they are hard to beat in the nearfield for lsitening at lower levels.
But if you want to build loudspeakers as the name implies then they must be generously dimensioned - everything else is faintwhisperers or loudscreamers. There is a funny name in German for the last one: "Bruellwuerfel".
Regards
Charles
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And that level has a fixed value independent from the distance to the source?
https://www.youtube.com/watch?v=ldfVlLk2wbM
https://www.youtube.com/watch?v=-0gED3rn2Tc
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Dynamic is not transcient ! But transcient is needed to acheive proper dynamic when the headroom becomes big between the lowest and biggest SPLs.
ANy little driver can do that in the lows and mid bass or an array of them ! Xmax is crossed before and heating of the voice coil limits the SPl.... : the behavior becomes the opposite of dynamic when the average level is more than casual listening ! Some rare exception, maybe some car 8" or 10" drivers with Xmax of 15 mm, but better for the transcient in the low to have a bigger Sd (à la M2, VOTT, etc) for a better transcient and full pistonic behavior. And of course mid-and treble which follows for the bass transcient perception.
The limitation percieved with big Sd drivers are comming from a bad design or too small listening rooms or both... to stay with a little driver below 500 to 1000 Hz you need a better impedance adaptation with air imho : with a device called Horn.
ANy little driver can do that in the lows and mid bass or an array of them ! Xmax is crossed before and heating of the voice coil limits the SPl.... : the behavior becomes the opposite of dynamic when the average level is more than casual listening ! Some rare exception, maybe some car 8" or 10" drivers with Xmax of 15 mm, but better for the transcient in the low to have a bigger Sd (à la M2, VOTT, etc) for a better transcient and full pistonic behavior. And of course mid-and treble which follows for the bass transcient perception.
The limitation percieved with big Sd drivers are comming from a bad design or too small listening rooms or both... to stay with a little driver below 500 to 1000 Hz you need a better impedance adaptation with air imho : with a device called Horn.
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