You can cross too low and get wonderful frequency response, simple crossovers that use the natural roll off of the drivers, and sky high distortion thrown in for good luck.
Or you can do careful modeling looking at target SPL and cone excursion, measure the drivers distortion at various powers across the crossover and realize why it can be better to cross higher.
Darn nice drivers, but I have drifted away from soft domes. A really good 7, like the one you picked, can reach 2K or so OK before the response gets too hard to deal with and 2 a side can keep excursion down low enough to cross to a sub. Almost. A top like tweeter like the ss can get down to 2K OK. Usually. If careful. I would not go down to 1800 myself. How to tell? MEASURE IT YOURSELF!
FWIW, I built a pair inspired by the Zaph SR-71. Changed a lot of things including going to the aluminum domes but left the crossover where he had it. Way too low. I am going to do them again and move it up to 2K or 2.2 depending if I use the 27TBDC tweeters instead. Again due to the knee in the distortion curve, I am shifting my sub from 60 to 80. ( music system, not HT)
Or you can do careful modeling looking at target SPL and cone excursion, measure the drivers distortion at various powers across the crossover and realize why it can be better to cross higher.
Darn nice drivers, but I have drifted away from soft domes. A really good 7, like the one you picked, can reach 2K or so OK before the response gets too hard to deal with and 2 a side can keep excursion down low enough to cross to a sub. Almost. A top like tweeter like the ss can get down to 2K OK. Usually. If careful. I would not go down to 1800 myself. How to tell? MEASURE IT YOURSELF!
FWIW, I built a pair inspired by the Zaph SR-71. Changed a lot of things including going to the aluminum domes but left the crossover where he had it. Way too low. I am going to do them again and move it up to 2K or 2.2 depending if I use the 27TBDC tweeters instead. Again due to the knee in the distortion curve, I am shifting my sub from 60 to 80. ( music system, not HT)
So what do you think of the crossover designs on the link given.
SB17CAC35-8 + SB26CDC-C000-4 lub CRC NAC NRX MFC STC ADC 2,5 dro?ny - projekt by Bran?a
SB17CAC35-8 + SB26CDC-C000-4 lub CRC NAC NRX MFC STC ADC 2,5 dro?ny - projekt by Bran?a
I don't think you would have so many pages devoted to the design if it was a poor technical solution.
The fact that the designer has shared all the relevant information for scrutiny tells me a lot. Taking all the relevant measurements and publishing them for scrutiny needs confidence.
If the voicing doesn't align with you ears, you have enough Xover info to sharpen or lessen the responses where you are less than happy. Possibly the only thing you would touch is the attenuation on the tweeter.
The drivers are good quality and a few here have used them. I have used the tweeter and I like them, also great value for money.
All of this cannot tell you how well they will sound in your room which is the case for nearly all kits unless you have a friend who has built them already.
Merry Christmas.
The fact that the designer has shared all the relevant information for scrutiny tells me a lot. Taking all the relevant measurements and publishing them for scrutiny needs confidence.
If the voicing doesn't align with you ears, you have enough Xover info to sharpen or lessen the responses where you are less than happy. Possibly the only thing you would touch is the attenuation on the tweeter.
The drivers are good quality and a few here have used them. I have used the tweeter and I like them, also great value for money.
All of this cannot tell you how well they will sound in your room which is the case for nearly all kits unless you have a friend who has built them already.
Merry Christmas.
I don't understand Polish, but the design appears to be based on real measurements (on-axis only though), and it seems good. I would have liked best a lower crossover point for better power response, something you can't see on on-axis measurement only.
However this is a 2.5 way design and thus IMHO not suitable to your room.
Ralf
However this is a 2.5 way design and thus IMHO not suitable to your room.
Ralf
With the CAC design there are no resistors so if I built that one I am not sure where I would put a resistor to change the tweeter level.
I suppose that really applies to most designs using the the NAC etc.
I suppose that really applies to most designs using the the NAC etc.
If needed you would insert a resistor in line with the tweeter, or alternatively an Lpad resistive attenuator, which you would have to research or ask somebody to help you with. It is either the use of considerable skill with design or pure luck that a resistor isn't needed in the design. typically 95% of the time tweeters need padding down to match the midrange sensitivity.
The second design using the paper drivers does have a inline resistor. Everything is tweakable if you desire or have the inclination.
Have you read here:
Introduction to designing crossovers without measurement
Maybe a 6.5" plus 1" tweeter from one of Troels SB designs would suit with the port intentionally blocked if you dont want a reflex. Especially as I have now read that you have a sub, if more bass is needed on occasions.
What do you think, see here:
SBAcoustics-61-NAC
The second design using the paper drivers does have a inline resistor. Everything is tweakable if you desire or have the inclination.
Have you read here:
Introduction to designing crossovers without measurement
Maybe a 6.5" plus 1" tweeter from one of Troels SB designs would suit with the port intentionally blocked if you dont want a reflex. Especially as I have now read that you have a sub, if more bass is needed on occasions.
What do you think, see here:
SBAcoustics-61-NAC