I think there's more to it than just the cone material. I think it's more about the overall construction of the drivers. The cone material is, of course, very important, but there's more to the implementation. I will recommend looking at the Purifi drivers. They're so much better than everything else I've used in regards to low distortion and accurate reproduction of the signal. Nothing else I've used is even close and the measurements show that. I am working on my 3rd design with them right now. In my experience, they're unbeatable. I have only used the paper cone Purifi but the Aluminum looks to be even better in regards to low distortion and low end extension.
I need to see that! An Ozzy concert in my basement!
https://www.parts-express.com/Peerl...-Fiber-Cone-Full-Range-264-1064?quantity=2000 Hard to get now, but it's an inexpensive driver that sounds quite good when used within its limits. Very clean impulse, which is hard to come by in many small fullrangers.
https://www.madisoundspeakerstore.com/approx-3-fullrange/sb-acoustics-sb10pgc21-4-3-full-range/
https://www.madisoundspeakerstore.c...-10m-4614g06-3-fiberglass-cone-midrange-each/
https://www.madisoundspeakerstore.c...y-12w/4524g-4.5-fiberglass-cone-woofer-4-ohm/
https://www.madisoundspeakerstore.com/approx-5-midrange/scanspeak-15m/4624g-discovery-5.25-midrange/
https://www.madisoundspeakerstore.c...anspeak-15w/8434g00-discovery-5.25-midwoofer/ I've used these and like them.
https://www.madisoundspeakerstore.c...eak-discovery-18w/4434g-00-7-midwoofer-4-ohm/ I've used these and like them.
https://www.madisoundspeakerstore.com/approx-8-woofers/scanspeak-22w/4534g-discovery-8-woofer-4-ohm/
https://www.madisoundspeakerstore.c...stics-sb42fhcl75-6-15-fiberglass-cone-woofer/
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This is a particualrily important aspect of drivers use in 1-ways where you can’t (try) to filter out the ringing up top.
One ian trying to get ba well controlled transition form pistonic behaviour to chaotic behavior all the way up. Notice the use of “controlled” and “chaotic” in the same process, it is REALLY hard too do.
Things like cone shape, rings in the cone, even extra surround in the middle of the driver, different thicknesses thru the cone (Diatone 610) usally thinner at the edge), different come materials — there was an English FR (brand escapes me) with a metal inner part of the cone, and paper on the outside), varying cone coating thickness and or placement
I’m not s big fan poly but a favourite woofer was a poly cone, with a “weave” of some fiber. suppposedly carbon fibre, but i doubt it, the fibres were just layered over the cone. They vibrtated when the cone strated moving, and they had impressive ringing —a ring really, only 1. Once i locked down then fybres icer the cone with 3 deceasing iats of midPos=dge (a specific PVA that dries into a more flexible material lthan white glue) with great success.
The big whoopmat the topmis flattened right out, making for much greater extension.
dave
Right, this is vital if you're wanting to use TL modes to extend the cone's upper operating BW.
With my 'ideal' hat on, drivers operating in pure piston modes over their used BW is actually my preference for multiways, if it can be achieved in the design context. But you need rigid drivers with very clean responses, decent motors etc., crossed with an eye to this (frequency / order & how you handle the stopband modes where relevant).
With my 'ideal' hat on, drivers operating in pure piston modes over their used BW is actually my preference for multiways, if it can be achieved in the design context. But you need rigid drivers with very clean responses, decent motors etc., crossed with an eye to this (frequency / order & how you handle the stopband modes where relevant).
I used the MW13TX with both the Seas DXT and a SB26ADC in an Augerpro waveguide - works very well, and I find them very smooth and still detailed. Some of the best DIY that I've had 👍
Equivalent of Mark Audio MAOP process ?
People relate SB26ADC doesn' sound like the SB26CDC. So maybe not equivalent, although the observation could come from factory batches difference ot the front difusor that is not the same...
Visaton has a titanium coned midrange, the TI100. And doesn't Fostex uses banana fiber in their "paper" blend?
Some also use plastic formulations dopped with stone powder...
Old Audax Aerogel worths the mentioning too.
To parody a TV serie, I would say better to ask Dr Kürk !
Old Audax Aerogel worths the mentioning too.
To parody a TV serie, I would say better to ask Dr Kürk !
which of course is an exotic fiber in Japan... I would not risk to ask which one is stronger of the african's or south-amzerican's ! 🤔😗😕😱
Yes... tried both. The 26ADC in Augerpro's oval waveguide, was smoother and nicer than the DXT... which was not bad at all to begin with...
Nope... just gotta sell them now, because I fell for the KEF coax instead. Something about point sources. The MW13TX and the 26ADC did great... I just had an opportunity and took it 😎
The transition point is kR = 2. see any introductory text on Acoustics eg Beranek or Olson For a given size, it is the frequency above which a piston starts to beam and the radiation resistance is no longer 'simple'.
Below that, good sounding cones are sorta pistonic. Above that, the radiating area must shrink if the unit is not to beam excessively and the radiated power drop. Almost all cone units operate through this point which is why you don't want a perfect piston.
For very small units like dome trebles, you can operate only below kR = 2 so a perfect piston is OK. But the rigid materials will eventually breakup with a HUGE peak; sorta OK if this is at 50kHz.
We made some of the best hard dome trebles, using Aluminium, a diamond like ceramic from Sumitomo, Titanium (not quite as good as the very similar Aluminium dome) and also an experimental Beryllium dome ... cos Marketing wanted stuff hand carved from solid BS & Unobtainium by virgins.
But the favourite dome treble materials of my R&D Dept. were soft. Alas, the formulations we liked are no longer available.
That's not to say, you can't make good speaker systems using hard domes. We made and sold loads. But the second best selling speaker in Europe, one of my inventions 😊 , used a soft dome and was for a time, one of the 3 best small speakers you could buy.
Yes. But in fact this is what good sounding UFM (paper) cones do. Good sounding 'plastic' cones usually look more 'controlled' 😊
Oh no, but woven cones look so neat! Is there any good news here?
https://sites.google.com/site/undefinition/updates/hivil6-4r
I've been thinking about using the HiVi L6-4R (or newer L6-8R) since Paul Carmody said nice things, in particular: