But in the 3wc-15, the 8" is cut higher and the tweeter has no waveguide...it s not à good concept?
just very harder to do, off axis must copes, means low cut-off,means more disto on the tweeters... All about the spl average you are listening to. Also here I surmise front bafle width helps... notice the Be version tweeter is a little wave guided by design.
frankly, id have to compare both.
im just going with my very limited experience with BE tweeters
in the shoes of such a kit I would try a huge WG, not necessarily with an expensive tweeter. Maybe a SB26 STAC or metal SB26ADC could do the trick. I surmise it is all about the filter as well. That's funny TG both seems too like the huge loudspeaker with narow horn dispersion and at the opposit non wave guided tweeters at the same time in his narrow living room of 20m² (dunno remember if 17 or 17 square meter he said)
your actual 80L cabinet is too much little for the 3WC-15 design which is around 110 L. Seems made as said tovput the 12pr320 for instance, not the Faital 15".
you can compare both the overture aera of a rectangular overture, it is WxL , for the volume you add (multipllication) the depth.
For a circle, aera is 3.14 x diameter , add depth for the volume.
Now, a port seems more complex with calcul of the speed of air through the port, so it is not apple and apple comparaison...
you can compare both the overture aera of a rectangular overture, it is WxL , for the volume you add (multipllication) the depth.
For a circle, aera is 3.14 x diameter , add depth for the volume.
Now, a port seems more complex with calcul of the speed of air through the port, so it is not apple and apple comparaison...
I want to start from the 3wc-15 design but modify it and adapt it to my speakers with active crossover. I have 103 liters for the woofer after modification.
I already have 2 rectangular events of w=3.5 cm H= 26 and long = 16
which requires a volume of 1456 cm3 so 1.45 liters each event
in the 3wc-15, troel uses 125 liters and 2 round vents of 1570 cm3 so 1.57 liters
I would like to know if it is necessary to modify the size of my events because my volume is 22 liters less...for have 38 hz
I already have 2 rectangular events of w=3.5 cm H= 26 and long = 16
which requires a volume of 1456 cm3 so 1.45 liters each event
in the 3wc-15, troel uses 125 liters and 2 round vents of 1570 cm3 so 1.57 liters
I would like to know if it is necessary to modify the size of my events because my volume is 22 liters less...for have 38 hz
To keep the Fb the same, each of your rectangular vents should be 300 mm. You will know best by listening to the final product.
Thanks but Why 300 ?
Troel event area 78,539 cm2
Volume of its event (long 200) = 1530.78 cm3
Mine :
Area = 91 cm2
My event is 16 cm long so = 1456 cm3
But I have a lower literage of 22 liters
I can only change the height to 26cm, using plate wood in the event. So I can reduce to 25, 24, 23...not enlarge it
Perhaps another 15" is better for 100 liters
Troel event area 78,539 cm2
Volume of its event (long 200) = 1530.78 cm3
Mine :
Area = 91 cm2
My event is 16 cm long so = 1456 cm3
But I have a lower literage of 22 liters
I can only change the height to 26cm, using plate wood in the event. So I can reduce to 25, 24, 23...not enlarge it
Perhaps another 15" is better for 100 liters
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I don't know why TG sticks to 15pr400 in all his 15" designs. 15pr400 is good for 2 way designs. Anything below 500hz I would take 15fh500. I highly recommend swapping in active TG designs.
Seems it is all about the volume load and upper cut-off choice.
Tony Gee (Humble: HomemadeHifi) liked the 15PR400 as well in a higher cut-off with the Calapamos (circa 200L) and as I understand it above the natural 200/300 hz natural max of most 15". As usual, lower cut-off has better result with more rigid cone (higher mms)... my understanding at least!
For Sebas 75003 the Faital + Eminence 8" beta 8-A (@Pano and @profiguy members advised me once about this driver, IIRC) ... cut-off anything between 200 hz to 500 hz according how you want to manage the baffle-step... For a 8" it has (on axis) a high-ish flat on axis >2 k Hz)... sounds like a good SQ/QP trade off.
Tony Gee (Humble: HomemadeHifi) liked the 15PR400 as well in a higher cut-off with the Calapamos (circa 200L) and as I understand it above the natural 200/300 hz natural max of most 15". As usual, lower cut-off has better result with more rigid cone (higher mms)... my understanding at least!
For Sebas 75003 the Faital + Eminence 8" beta 8-A (@Pano and @profiguy members advised me once about this driver, IIRC) ... cut-off anything between 200 hz to 500 hz according how you want to manage the baffle-step... For a 8" it has (on axis) a high-ish flat on axis >2 k Hz)... sounds like a good SQ/QP trade off.
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I am interested in building one of Troels designs - leaning towards the TL2, TL3, Fatial 3W-15 or CNO-4. I want a speaker with a high level of dynamics and transparency. Can anyone who has heard or built any of these designs comment?
Thanks!
Thanks!
I have the TL2 and building now the CNO4 for a friend, so I'll be able to compare the two in about a month.
I have already heard the Faital 3WC-10 against the TL2, no comparison, size matters