OP
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- #921
We should design our own waveguide.
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Yes! Would love a sealed 2-way for subwoofer-based systems.
I think the cardioid is a two way, sort of.
Still, I have more modest ambitions.I think the cardioid is a two way, sort of.
Yes, All-Purifi cardioid will be incredibly expensive if that's what you're aiming for.Still, I have more modest ambitions.
On the other hand, cardioid SB Acoustics should be less expensive than All-Purifi two way by a fair margin, and I do question which is the best option.
Is the back of the Purifi tweeter open, or is that just a dimple? Maybe my screen is playing tricks on me.
it’s a sealed chamber.
OP
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- #928
Only a little hole at the back. That hole is connected through long channel to inside. It reduced air pressure change, DC.
Got it, so it can share volume with the woofer.
Right?
Right?
OP
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- #930
No. It only allows to be affected by close to DC signal. For sealed enclosure, it’d better have tweeter chamber. For ported mostly don’t be affected.
Thanks! Can't wait to see what you do with it....
OP
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- #933
MTM design was needed to achieve bass capability and optimized cardioid pattern.
It leads to have narrow vertical response over 500 to 1.5kHz, but it’s a good feature to reduce floor/ceiling bounce If you once set the speaker height correctly.
And Our vertical dispersion is better than most similar size MTM design. This is the latest optimized vertical response.
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Unbelievably quick and helpful responses you offer, AsciLab- good on you.
Can't wait for the all-Purifi model.
I am pretty keen on a pair of active full-range speakers with ULTRA-low distortion.
Ready when you are
Not quiet convincing: dip in x-over region, but not following above frequencies with only little attenutation to baseline.
Perhaps some vertical directivity adjustements via adjusted waveguide/horn?
Or some 'I' shaped tweeter.
OP
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- #936
Wide 2-3kHz vertical dispersion is affected vertically wide baffle. Vertically larger size waveguide can help the tweeter get more smooth vertical dispersion. But it makes worse due to increase midrange C to C. In result the vertical lobbing gets worse.
For “I” shaped tweeter, the biggest curse is much narrow vertical response at higher frequency. You can see ribbon or long AMT tweeter response.
To solve this problem well, tweeter array is needed. This can achieve constant narrow vertical response while constant wide horizontal response.
That is on our road map too, but we don’t know when.
Which model A6B, C6C, A6C, I don’t believe prices have been finalised just yet.
Keith
Keith
Hi Keith, its me (Simon)! We already discussed the prices directly after I wrote my question so all good thanks.
OP
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- #940
We’ve got PTT1.3T Purifi's new tweeter a few weeks ago and finished waveguide design.
Our goal directivity was +/-60 deg as typical recommended constant directivity.
It works to top frequency too. To about 17kHz the beam width keeps wide and constant.
I can’t wait to hear its sound of super constant and wide directivity with extreme low distortion.
PS. We also work hard to prepare international selling, contacting dealers for many countries. Thank you for kind wait and We’ll show our best.