Hah I saw that too. Give one to me I'll find a way. Is that a 2-inch x-mech? Thats heading towards car SPL comp territory. Bonkers.
Next up, the 12 inch, with new PURI-COOL active cooling fan ducted into the voice-coil!
Next up, the 12 inch, with new PURI-COOL active cooling fan ducted into the voice-coil!
Any chance we are going to see a demo speaker with this driver, the 6.5” aluminium mid and the new tweeter in a big monitor style box?
I find that that with increasingly larger woofers it becomes more challenging to measure indoors and make useful comparisons.
@lrisbo
What are the measurement conditions of the 10” extended woofer?
@Ugg10
With the 10” woofer and controlled wide dispersion tweeter, I wonder if you even need that 6.5” as a filler
@lrisbo
What are the measurement conditions of the 10” extended woofer?
@Ugg10
With the 10” woofer and controlled wide dispersion tweeter, I wonder if you even need that 6.5” as a filler
Higher DCR. 10" Purifi is a lot heavier, which more than offsets increased Sd and motor strength. There's going to be a lot of mass tied up in a long 4-layer coil and former.
I wonder if they'll ever use more exotic lightweight materials like Carbon or Magnesium alloys.
Exotic materials have marketting advantage for sure.
However, I prefer good science, and optimised geometry. For instance, good old-fashioned fibreglass has been shown to achieve excellent results, eg, Tymphany TG7 drivers, Scan-Speak Discovery, SBA SB10PGC, without costing the earth eg. CVD diamond or beryllium.
These diamond or beryllium materials are expensive not exactly because they are exotic or rare, but also due to other factors eg. market forces- controlled by monopoly or duopoly.
@lrisbo
Please check your PM after Munich; I wrote to you re. another manufacturer using fibreglass.
However, I prefer good science, and optimised geometry. For instance, good old-fashioned fibreglass has been shown to achieve excellent results, eg, Tymphany TG7 drivers, Scan-Speak Discovery, SBA SB10PGC, without costing the earth eg. CVD diamond or beryllium.
These diamond or beryllium materials are expensive not exactly because they are exotic or rare, but also due to other factors eg. market forces- controlled by monopoly or duopoly.
@lrisbo
Please check your PM after Munich; I wrote to you re. another manufacturer using fibreglass.
Last edited:
Ideally you're looking for a stiffness/density material, that also exhibits high viscoelastic losses.
Breakup is high freq and at the same time damped, unfortunately in most cases these two properties are a trade off, some of the carbon-fiber composites can do it quite well, but it depends on the binding matrix material.
Breakup is high freq and at the same time damped, unfortunately in most cases these two properties are a trade off, some of the carbon-fiber composites can do it quite well, but it depends on the binding matrix material.
I was mostly thinking the lighterweight materials are more sensitive to input, but you're absolutely right about the breakup part.
Damn, the SB acoustics carbon cones are actually 1dB less sensitive than their polycone counterparts. I feel dumb.
Damn, the SB acoustics carbon cones are actually 1dB less sensitive than their polycone counterparts. I feel dumb.
It might be possible to constrain layer dampen an aluminium cone with a sandwich alu-poly-alu sandwich, but it would increase build complexity.
Purifi already does that with their paper cone woofers. Paper is quite lightweight compared to most alternative cone materials. But most of the moving mass is tied up in the long underhung motor.
Something like Textreme is interesting as far as lightweight materials suitable for higher-efficiency drivers, but it would be considerably harder to simulate and characterise. These fiber composites present anisotropic stiffness based on the weave. They won't have such convenient symmetries either: cross-shaped deflection and acoustic radiation from circular membranes. Translates to a more expensive 3D simulation of components instead of being able strip out dimensions of certain components with symmetry.
measured in our anechoic chamber with infinite baffle. the chamber is of course not perfect but surpringly good in the bass. mic distance is 40cm (graphs converted to 1m level)
Friends in a 2 way Bookshelf sealed or Ported with or without Passive radiator will a Purifi 6.5" woofer beat or match a WaveCore WF275BD01 10" driver
Amp power is not an issue and I hear electronic and techno music a lot and loud. Will be using miniDSP 2x4Hd for crossover
Amp power is not an issue and I hear electronic and techno music a lot and loud. Will be using miniDSP 2x4Hd for crossover
Last edited:
15 inch bass/mid next please....
2 inch+ travel 15 inch and distortion that low. Could you imagine it... My god.
2 inch+ travel 15 inch and distortion that low. Could you imagine it... My god.
I did, it is not impossible 🙂
Attachments
ATH DOME Profile 70 degree coverage 16mm Deep, where did I read about a 70 degree waveguide 16mm deep...
147mm wide Axisymmetric
https://www.diyaudio.com/community/...-design-the-easy-way-ath4.338806/post-7351271
Normalized to 10 degrees looks better
147mm wide Axisymmetric
https://www.diyaudio.com/community/...-design-the-easy-way-ath4.338806/post-7351271
Normalized to 10 degrees looks better
