Hello everyone.
There is such a Jurko project, what do you think about it?
How does he compare to Kalasan and Kairos?
JurKo :: Pkaudio
There is such a Jurko project, what do you think about it?
How does he compare to Kalasan and Kairos?
JurKo :: Pkaudio
Last edited:
Hello Dreew, JurKo is my design. I would like to mention also Ghibli:
Ghibli :: Pkaudio
I did Jurko for the client, the main goal was to keep overall construction simple, with LR2 crossover, therefore slanted front baffle.
They both had very good sound, easy to listen. I attach photos of recently finished build from Slovakia.
Ghibli :: Pkaudio
I did Jurko for the client, the main goal was to keep overall construction simple, with LR2 crossover, therefore slanted front baffle.
They both had very good sound, easy to listen. I attach photos of recently finished build from Slovakia.
Attachments
Hi Pida.
An interesting project. It would be nice to compare him to Kalasan and Kairos.
Do you have plans to do MTM or 2.5-way at 2xMW16P?
Now there is only one free project on the 2.5-way - Rinjani from SB Acoustics: Rinjani – Sbacoustics
Troels has an SBA 16 MTM project, but it's not free: SBA-16-MTM
An interesting project. It would be nice to compare him to Kalasan and Kairos.
Do you have plans to do MTM or 2.5-way at 2xMW16P?
Now there is only one free project on the 2.5-way - Rinjani from SB Acoustics: Rinjani – Sbacoustics
Troels has an SBA 16 MTM project, but it's not free: SBA-16-MTM
I studied Kalasan and Kairos projects a lot, before I started with Jurko and Ghibli.
No plans for MTM nor TMM.
No plans for MTM nor TMM.
The Troels SBA761 is a 2.5 way and the MW19 is not a lot bigger than the MW16 that it is paired with plus it us 1st order which is interesting.
Yes, I have already seen this Troels SBA761 - this cabinet is difficult to repeat.
And I already have four MW16P-8 and I need to do something with them. 🙂
And I already have four MW16P-8 and I need to do something with them. 🙂
Based purely on theoretical study of the tweeters, all three seem interchangeable.
Impedance profiles are all alike, mild differences in Fs and impedance at Fs will not make significant difference of Fr with the crossover.
Sensitivities in the critical range 2-7kHz are same.
FR shapes and dispersions at 10kHz and above are different, and will have impact on the overall sound and character.
So my conclusion is, for Jurko project, named tweeters are interchangeable, and due to overall simplicity of the tweeter crossover, potencial sound differences are easily adjustable in crossover.
Potential adjustments:
1. 2-7kHz too hot: tweeter capacitor (red) 3.9uF to be changed to 3.6 or 3.3.
2. less or more spark/air needed, tweeter rezistor can be changed to 5R6 to increase tweeter level above 5kHz. And vice versa, 7R5 sets lower tweeter level.
All that changes will affect phase tracking, but no worries, with standard crossover and RN phase tracking is perfect in broad frequency range, and suggested change of components will cause phase tracking missalignment ~5deg. Change of the tweeter could cause higher phase missalignment, but I would not expect big changes at 2kHz, so my estimate would be missalignment <10degrees, which is still very good.
And what tweeter to choose? Hmmm, few months ago I created project with Bliesma T25B, and I do not look back. So BN would be my recommendation, though its sound likely will not be Bliesma level.
Impedance profiles are all alike, mild differences in Fs and impedance at Fs will not make significant difference of Fr with the crossover.
Sensitivities in the critical range 2-7kHz are same.
FR shapes and dispersions at 10kHz and above are different, and will have impact on the overall sound and character.
So my conclusion is, for Jurko project, named tweeters are interchangeable, and due to overall simplicity of the tweeter crossover, potencial sound differences are easily adjustable in crossover.
Potential adjustments:
1. 2-7kHz too hot: tweeter capacitor (red) 3.9uF to be changed to 3.6 or 3.3.
2. less or more spark/air needed, tweeter rezistor can be changed to 5R6 to increase tweeter level above 5kHz. And vice versa, 7R5 sets lower tweeter level.
All that changes will affect phase tracking, but no worries, with standard crossover and RN phase tracking is perfect in broad frequency range, and suggested change of components will cause phase tracking missalignment ~5deg. Change of the tweeter could cause higher phase missalignment, but I would not expect big changes at 2kHz, so my estimate would be missalignment <10degrees, which is still very good.
And what tweeter to choose? Hmmm, few months ago I created project with Bliesma T25B, and I do not look back. So BN would be my recommendation, though its sound likely will not be Bliesma level.
Attachments
Last edited:
Thanks!
First, I'll try to leave the crossover unchanged and listen to the sound.
If you suddenly have the opportunity to listen to the JurKo project with a BN tweeter and you will be to make changes to the crossover, post this information on your website.
I think the Bliesma T25B is a great tweeter for 3-way loudspeakers. For 2-way, the Bliesma T34B would be good. So in my case the BN is likely to be a good level up above RN.
First, I'll try to leave the crossover unchanged and listen to the sound.
If you suddenly have the opportunity to listen to the JurKo project with a BN tweeter and you will be to make changes to the crossover, post this information on your website.
I think the Bliesma T25B is a great tweeter for 3-way loudspeakers. For 2-way, the Bliesma T34B would be good. So in my case the BN is likely to be a good level up above RN.
Last edited: