Maybe my question should have been placed in the Parts forum, but coverage here seems wider.
Does anyone here know a source of Focal Polykevlar cones, specifically for the 5K513L midwoofers?
Does anyone here know a source of Focal Polykevlar cones, specifically for the 5K513L midwoofers?
Protect Kevlar Konez against UV-light exposure it will turn into a brownish color and loose strength aproxx 30% ...
I think @Kravchenko_Audio will probably have some ideas 🙂
In my experience it's hard to say, there are plenty of manufactures claiming they make stuff themselves.
But in reality they basically get a Ikea box delivered that they just assemble.
Not saying that's the case here
In my experience it's hard to say, there are plenty of manufactures claiming they make stuff themselves.
But in reality they basically get a Ikea box delivered that they just assemble.
Not saying that's the case here
Btw - the relatively high inductivity (mH) of the VC of many simple motor structures makes the freq resp (FR) quite flat , it's a marketing trick to boost the sales!
High saturation of the t-shaped pole piece is the holy grail and not easy to achieve so most manufacturers avoid this costly simulation from a FEA expert!
High saturation of the t-shaped pole piece is the holy grail and not easy to achieve so most manufacturers avoid this costly simulation from a FEA expert!
There is a clear amount unfamiliarity when saying that one thing is better than the other or that there are holy grails.
It's always about compromises, even when price is not an issue.
Getting a proper low-end with a highly saturated motor is basically not possible to just name one (of the many) examples.
It's always about compromises, even when price is not an issue.
Getting a proper low-end with a highly saturated motor is basically not possible to just name one (of the many) examples.
Most motors have high MD (nonlinear multi-tone distortions) , stay away from them to get a clean sound to enjoy higher listening level playback!
Crank 'em up!
🙂
Crank 'em up!
🙂
With no bottom end or an insane amount of boosting needed to get low-end?
I guess a good listening experience can be very personal indeed.
Also, let we just ignore all the practical difficulties and implications, to try to prove a point..... 🙄
I guess a good listening experience can be very personal indeed.
Also, let we just ignore all the practical difficulties and implications, to try to prove a point..... 🙄
@b-force: I am well aware of the "IKEA approach". But these particular cones plus associated surrounds do indeed look pretty proprietary. I was hoping someone would know a Focal parts outlet.
Hard to know, could be a mix as well.
Or just a lot of NOS.
Although they still seem to come up with new stuff once in a while.
Not 100% sure. Focal may make them. Just like so many companies "design the products that they sell". Not exactly the truth. I know of a few of the top two or three cone factories in the world. But I have not checked out about the Linen type that Focal is doing now. It is very niche. And my guess is that they do make it. FOCAL used to be very vertically integrated.
The problem with this cone is the layup of the Kevlar. To get this from a vendor you would need to meet minimum MOQ (Minimum Order Quantities) For something like this it could be 500pcs on the low side. But I have walked past pressings of the kevlar midranges for B&W.
Some of the regular Kevlar cones B&W used or branded were licensed and made elsewhere. The former Philips factory in Dendermonde in Belgium, later D&M, now PSS, used to make the automobile version for B&W in the beginning of this millenium.
But I have not been able to trace the Focal cones yet: their composition looks a bit more sophisticated than B&W.
I don't trust those fancy fabric stuff at all , the matrix dope decides!
But I like thermoformed TPX , would be very nice to have a dome mid with TPX !!! (or an inverted U-disc floating object)
DKM offers a Zylon fabric must be thermo-formed at exactly 150 degree Celsius , but bonds very badly to any glue , so must be special treated first!
I think it's the same stuff Yamaha used for their revived monitors .... Beryllium - can it be recycled?
Regarding poisoning - only the worst individuals gonna survive , like me 🙂
But I like thermoformed TPX , would be very nice to have a dome mid with TPX !!! (or an inverted U-disc floating object)
DKM offers a Zylon fabric must be thermo-formed at exactly 150 degree Celsius , but bonds very badly to any glue , so must be special treated first!
I think it's the same stuff Yamaha used for their revived monitors .... Beryllium - can it be recycled?
Regarding poisoning - only the worst individuals gonna survive , like me 🙂
Kevlar scream loudly in the midband. Every cone has a particular problem area. But Kevlar the problem area is right in the required passband of the driver. Attempts at reducing that ringing make for a heavy cone. To add to the fun and games many "Kevlar" cones are actually fiberglass. Same goes for carbon fiber cones. Actually visiting your vendors is an education all to itself.
That is because they are done in house for most part.
You will see one of the 'W' cones (fiber/rohacell/fibre) done in the beginning of the video.
They're cabinetry is subcontracted to a local woodworking company.
Take a look below:
Actually that is dependent on design, and execution of the driver itself mostly, not Kevlar. The data added below from the B&W LF00264 done by Zaph audio.
Also take note of the sensitivity compared to most 'hifi' midranges.
Yes there is a breakup and slight resonance at 3,5k, that deserves a gentle notch.
To me that is already out of the midrange.
Overall though it is cleaner then 99% of the "competition" even with that artefact, all the way to 10 k.
And that is with a 6 grams cone on a 6".
A 4" cone wil have that breakup Even higher in frequency.
The need for the heavy and damped cone is not really existing ?
Most people would be crossing that driver to match the directivity of a tweeter 2-2,5k. And not stretch it to 3,5k with a low order xo ala B&W.
And the sensitivity opens up for some interesting driver combinations in some cases.
Attachments
2 more items of interest : Compact neodym tweeter fabric dome - price? (DIY)
A planar tweeter/midrange was mentioned somewhere - any more info on this?
https://www.kravchenko-audio.com/oem-commercial-products-and-development.html
thanks for dropping us some infos!
A planar tweeter/midrange was mentioned somewhere - any more info on this?
https://www.kravchenko-audio.com/oem-commercial-products-and-development.html
thanks for dropping us some infos!