Effect of cone material on low level resolution?

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#21
Noksukau said:
Y
The Vifa wood pulp cones (exactly how this differs from paper I'm not sure 🙄 ) are supposed to have excellent resolution, in a large part aided by their low moving mass. I've heard a production variant in a Vifa partner loudspeaker and was truly hooked by the natural sound and effortless detail on offer. But then I've never heard them against Accuton or (old) Seas to make a drect comparison. It always seems that the more specialist cone materials need a lot of crossover work to get the most out of them and I dislike complex solutions.

Ben.
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I HOPE these are good i ordered XT18WH0908 last night from solen and some other drivers. I thought i was being different since i did not see a lot of people using them.
 
#22
Well, other people may not agree, but I'm a very jealous man! 🙂

I can't remember the speaker exactly (Arcaydis I think), but there was a review of it in What Hi*Fi magazine where it got very high praise indeed, using what was visually identical to that Vifa wood-pulp driver. Alright, they might have tweaked things around a little, but it's still a rather decent unit that I would love to try some day. The speaker in question was a relatively large standmounter, looked to be about 15l, and I think retailed for £900. If I get more info I'll pass it on.

In the meantime, I'm sure you'll have great fun when the new bits arrive!
 
#23
Noksukau said:
Well, other people may not agree, but I'm a very jealous man! 🙂

I can't remember the speaker exactly (Arcaydis I think), but there was a review of it in What Hi*Fi magazine where it got very high praise indeed, using what was visually identical to that Vifa wood-pulp driver. Alright, they might have tweaked things around a little, but it's still a rather decent unit that I would love to try some day. The speaker in question was a relatively large standmounter, looked to be about 15l, and I think retailed for £900. If I get more info I'll pass it on.

In the meantime, I'm sure you'll have great fun when the new bits arrive!
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I think they are AVI pro-nine monitors, they got/get glowing reports from whoever hears them. Also anyone who uses the XT pulp woofers usually says they are really good too.

http://www.avihifi.co.uk/Pro-Nine Plus/Pro-nine.html
 
#25
Noksukau said:
The speaker in question was a relatively large standmounter, looked to be about 15l, and I think retailed for £900. If I get more info I'll pass it on.

In the meantime, I'm sure you'll have great fun when the new bits arrive!
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900 bucks ? ! ! NOt bloody likely 😱 I am paying 226 plus tax and shipping man .. no way in hell would i pay that for something i will burn camping if i dont like them 😡


edit <add> ooooooo My mistake you meant the finished product. AVI i wonder if that was the BC company that dissappeared .. edit
 
#26
Joules said:
It' about the sound speed of the material.

When the voice coil first trys to move the outeredges of the cone don't know anything about it until the impulse traveles out to that part of the cone. So the voice coil and former start moving before the outer part of the cone. The higher the freq. and the larger the cone and the softer the material (slower the sound speed of the material) the worse the problem gets. This traveling wave reflects off the outer edge and starts traveling back to the voice coil and now starts to creat standing waves. altho aluminum has a high sound speed it can't damp the standing waves very well. Paper and plastic have a much slower sound speed but can damp the standing waves better.
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Hmmmm. That makes some sense. I think that's part of what the Fostex whitepaper linked above was saying. The sound speed of the material would basically be it's rigidity right? That's what would make Accuton's ceramic and diamond and Focal's beryllium cone material so 'desirable' then? I think so....

So poly cones aren't able to be as detailed? Sorry to harp on this, but I've bee reading reviews of Egglestonworks and Rockport speakers, which use dynaudio/morel and dynaudio/skaaning drivers, respectively. They're talked about as being rather detailed. Hence my questioning, as I do think good poly drivers should be great, just have never thought them to be detailed, which I want.

Thanks.

Ben.
 
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