I'm not sure I understand the point you are trying to make or what the GIF's demonstrate. There are an almost infinite number of profiles that can be used to design any waveguide but when the driver is chosen all profiles will have three main factors, you can vary two and the third is fixed. When you set the width and depth the nominal wall angle is fixed. You can make it more constant by making the profile straighter or less constant by curving it more but the nominal wall angle is still fixed. If you want to make the directivity wider using the same profile the waveguide must be shallower, to make it narrower it must be deeper.
Are the dimensions of the tweeters buried anywhere in this thread?
I salvaged a few tweeters from Eris 4.5 speakers and would like to use them in an ideally cheap and low-effort build. So if these tweeters were similar to any of the ones you used to design waveguides I'd just use your waveguides instead of firing up ath/abec/akabak.
I salvaged a few tweeters from Eris 4.5 speakers and would like to use them in an ideally cheap and low-effort build. So if these tweeters were similar to any of the ones you used to design waveguides I'd just use your waveguides instead of firing up ath/abec/akabak.
The ones I found:
; SB Acoustics 26ADC aluminum dome
; SB Acoustics 26STAC fabric dome
;Peerless XT25SC-90-04
; Bliesma T34B
; Bliesma T25A
; Peerless DA25TX00-08
; Peerless PLS-P830970
; Dayton DC200-8 Woofer
; Seas H1212-06
; Scanspeak 6640
Documentation how single line format to describe a dome tweeter works: https://www.diyaudio.com/community/...he-easy-way-ath4.338806/page-623#post-7353694
; SB Acoustics 26ADC aluminum dome
Source.Contours = { ; Dome only
zoff 2; 1 = surface mount, 0 = flush mount to top of mounting edge, -20 = recessed mount behind 19 mm plywood
; Tweeter Dome
point p1 4 0 1 ; dome
point p2 -0.5 11.5 1 ; valley of dome
cpoint c1 -12.9 0 ; Dust cap dome
arc p1 c1 p2 1 ;
; Tweeter Surround
point p3 0 12.5 1 ;
point p4 1.5 12.5 1 ;
point p5 1.5 13 1 ; foil cylinder
point p6 0 13 1 ;
point p7 0 13.5 1 ;
point p8 1.5 15 1 ; 1st surround peak
point p9 0 16.5 1 ; 1st surround valley
cpoint c2 0 15 0 ;
arc p7 c2 p8 1 ;
arc p8 c2 p9 0 ;
line p2 p3 1 ;
line p3 p4 1 ;
line p4 p5 1 ;
line p5 p6 1 ;
line p6 p7 1 ;
; Diaphragm bracket
point p10 0 35 20 ;
point p11 -4 35 20 ;
point p12 -4 16.5 20 ;
line p9 p10 0 ;
line p10 p11 0 ;
line p11 p12 0 ;
; Waveguide start
point p25 -5 16.5 1 ; Waveguide start point
line p12 p25 0 ;
line p25 WG0 0 ; start of ATH waveguide
}
zoff 2; 1 = surface mount, 0 = flush mount to top of mounting edge, -20 = recessed mount behind 19 mm plywood
; Tweeter Dome
point p1 4 0 1 ; dome
point p2 -0.5 11.5 1 ; valley of dome
cpoint c1 -12.9 0 ; Dust cap dome
arc p1 c1 p2 1 ;
; Tweeter Surround
point p3 0 12.5 1 ;
point p4 1.5 12.5 1 ;
point p5 1.5 13 1 ; foil cylinder
point p6 0 13 1 ;
point p7 0 13.5 1 ;
point p8 1.5 15 1 ; 1st surround peak
point p9 0 16.5 1 ; 1st surround valley
cpoint c2 0 15 0 ;
arc p7 c2 p8 1 ;
arc p8 c2 p9 0 ;
line p2 p3 1 ;
line p3 p4 1 ;
line p4 p5 1 ;
line p5 p6 1 ;
line p6 p7 1 ;
; Diaphragm bracket
point p10 0 35 20 ;
point p11 -4 35 20 ;
point p12 -4 16.5 20 ;
line p9 p10 0 ;
line p10 p11 0 ;
line p11 p12 0 ;
; Waveguide start
point p25 -5 16.5 1 ; Waveguide start point
line p12 p25 0 ;
line p25 WG0 0 ; start of ATH waveguide
}
; SB Acoustics 26STAC fabric dome
Source.Contours = { ; Dome only
zoff 2; 1 = surface mount, 0 = flush mount to top of mounting edge, -20 = recessed mount behind 19 mm plywood
; Tweeter Dome
point p1 9 0 1 ; dust cap dome
point p2 0 13 1 ; valley of dome
cpoint c1 -4.88 0 ; Dust cap dome
arc p1 c1 p2 1 ;
; Tweeter Surround
point p3 0 13.5 1 ;
point p4 1.5 15 1 ; 1st surround peak
point p5 0 16.5 1 ; 1st surround valley
line p2 p3 1 ;
cpoint c2 0 15 0 ;
arc p3 c2 p4 1 ;
arc p4 c2 p5 0 ;
; Diaphragm bracket
point p10 0 35 20 ;
point p11 -4 35 20 ;
point p12 -4 16.5 20 ;
line p5 p10 0 ;
line p10 p11 0 ;
line p11 p12 0 ;
; Waveguide start
point p25 -5 16.5 1 ; Waveguide start point
line p12 p25 0 ;
line p25 WG0 0 ; start of ATH waveguide
}
zoff 2; 1 = surface mount, 0 = flush mount to top of mounting edge, -20 = recessed mount behind 19 mm plywood
; Tweeter Dome
point p1 9 0 1 ; dust cap dome
point p2 0 13 1 ; valley of dome
cpoint c1 -4.88 0 ; Dust cap dome
arc p1 c1 p2 1 ;
; Tweeter Surround
point p3 0 13.5 1 ;
point p4 1.5 15 1 ; 1st surround peak
point p5 0 16.5 1 ; 1st surround valley
line p2 p3 1 ;
cpoint c2 0 15 0 ;
arc p3 c2 p4 1 ;
arc p4 c2 p5 0 ;
; Diaphragm bracket
point p10 0 35 20 ;
point p11 -4 35 20 ;
point p12 -4 16.5 20 ;
line p5 p10 0 ;
line p10 p11 0 ;
line p11 p12 0 ;
; Waveguide start
point p25 -5 16.5 1 ; Waveguide start point
line p12 p25 0 ;
line p25 WG0 0 ; start of ATH waveguide
}
;Peerless XT25SC-90-04
Source.Contours = {
zoff -0.5
point p1 11.6 0 0.5
point p2 7.8 3.8 0.5
point p3 2.5 4.9 0.5
point p4 2.7 9 0.5
point p5 -0.6 12.7 0.5 ; voice coil
point p6 1.7 16.5 0.5
point p7 0 19 0.5
;point p8 0 22 0.5
cpoint c1 6 -2
cpoint c2 -0.6 9.3
cpoint c3 -1.8 16
arc p1 c1 p2 0
line p2 p3 0
line p3 p4 0.2
arc p4 c2 p5 1
arc p5 c3 p6 1
arc p6 c3 p7 0.2
line p7 WG0 0
}
zoff -0.5
point p1 11.6 0 0.5
point p2 7.8 3.8 0.5
point p3 2.5 4.9 0.5
point p4 2.7 9 0.5
point p5 -0.6 12.7 0.5 ; voice coil
point p6 1.7 16.5 0.5
point p7 0 19 0.5
;point p8 0 22 0.5
cpoint c1 6 -2
cpoint c2 -0.6 9.3
cpoint c3 -1.8 16
arc p1 c1 p2 0
line p2 p3 0
line p3 p4 0.2
arc p4 c2 p5 1
arc p5 c3 p6 1
arc p6 c3 p7 0.2
line p7 WG0 0
}
; Bliesma T34B
Source.Contours = {
dome WG0 34 7 2 -1 5 1.5
}
dome WG0 34 7 2 -1 5 1.5
}
; Bliesma T25A
Source.Contours = {
dome WG0 25 6.71 2.35 -0.54 4 1.2
}
dome WG0 25 6.71 2.35 -0.54 4 1.2
}
; Peerless DA25TX00-08
Source.Contours = {
dome WG0 26 5.6 3 1.5 4 1
}
dome WG0 26 5.6 3 1.5 4 1
}
; Peerless PLS-P830970
Source.Contours = {
point p1 0 0 2
point p2 -4 13 2
point p3 -5 13 2
point p4 0 19.75 2
point p5 -1.6 21.25 1
point p6 0 22.75 1
cpoint c1 -23.67 0
cpoint c2 0 21.25
arc p1 c1 p2 1.0
line p2 p3 1.0
line p3 p4 1.0
arc p4 c2 p5 0.75
arc p5 c2 p6 0.25
}
point p1 0 0 2
point p2 -4 13 2
point p3 -5 13 2
point p4 0 19.75 2
point p5 -1.6 21.25 1
point p6 0 22.75 1
cpoint c1 -23.67 0
cpoint c2 0 21.25
arc p1 c1 p2 1.0
line p2 p3 1.0
line p3 p4 1.0
arc p4 c2 p5 0.75
arc p5 c2 p6 0.25
}
; Dayton DC200-8 Woofer
Source.Contours = {
zoff -24 ; -24 = external mount, -30 = flush mount, -49 = recessed mount w/ 19 mm plywood, -32 = rear flush mount
point p1 12 0 20 ; center of dome
point p2 0 35 20 ; inner edge of cone
point p3 24 75 20 ; outer edge of cone/ inner edge of surround
point p4 31 82 20 ; peak of surround
point p5 24 89 20 ; outer edge of surround
point p6 24 93 0 ; outer edge of divot/ inner edge of mount bracket
point p7 31 93 0 ; inner peak of mount bracket
point p8 31 104 0 ; outer peak of mount bracket
point p9 24 104 0 ; outer edge of mount bracket
cpoint c1 -50 0 ; center of dome arc
cpoint c2 24 82 ; center of surround arc
arc p1 c1 p2 10 ; dome arc
arc p3 c2 p4 0 ; inner half of surround arc
arc p4 c2 p5 0 ; outer half of surround arc
line p2 p3 0 ; cone line
line p5 p6 0 ; divot line
line p6 p7 0 ; divot to peak mount line
line p7 p8 0 ; inner to outer peak mount line
line p8 p9 0 ; outer peak to mount edge line
line p9 WG0 0 ; mount edge to waveguide line
}
zoff -24 ; -24 = external mount, -30 = flush mount, -49 = recessed mount w/ 19 mm plywood, -32 = rear flush mount
point p1 12 0 20 ; center of dome
point p2 0 35 20 ; inner edge of cone
point p3 24 75 20 ; outer edge of cone/ inner edge of surround
point p4 31 82 20 ; peak of surround
point p5 24 89 20 ; outer edge of surround
point p6 24 93 0 ; outer edge of divot/ inner edge of mount bracket
point p7 31 93 0 ; inner peak of mount bracket
point p8 31 104 0 ; outer peak of mount bracket
point p9 24 104 0 ; outer edge of mount bracket
cpoint c1 -50 0 ; center of dome arc
cpoint c2 24 82 ; center of surround arc
arc p1 c1 p2 10 ; dome arc
arc p3 c2 p4 0 ; inner half of surround arc
arc p4 c2 p5 0 ; outer half of surround arc
line p2 p3 0 ; cone line
line p5 p6 0 ; divot line
line p6 p7 0 ; divot to peak mount line
line p7 p8 0 ; inner to outer peak mount line
line p8 p9 0 ; outer peak to mount edge line
line p9 WG0 0 ; mount edge to waveguide line
}
; Seas H1212-06
Source.Contours = {
zoff -2
point p1 5.2 0 2
point p2 0 13.83 1
point p3 1.75 15.58 1
point p4 0 17.33 1
point p5 1 17.33 1
cpoint c1 -15.8 0
cpoint c2 0 15.58
cpoint c3 0.435 21
arc p1 c1 p2 1.0
arc p2 c2 p3 0.75
arc p3 c2 p4 0.25
line p4 p5 0
line p5 WG0 0
}
zoff -2
point p1 5.2 0 2
point p2 0 13.83 1
point p3 1.75 15.58 1
point p4 0 17.33 1
point p5 1 17.33 1
cpoint c1 -15.8 0
cpoint c2 0 15.58
cpoint c3 0.435 21
arc p1 c1 p2 1.0
arc p2 c2 p3 0.75
arc p3 c2 p4 0.25
line p4 p5 0
line p5 WG0 0
}
; Scanspeak 6640
Source.Contours = {
zoff -0.8
point p1 4.76 0 2.5
point p2 0 13.462 0.5
point p3 1.57 16.256 0.5
point p4 0 19.05 1.0
point p5 0 19.55 1
cpoint c1 -16.6522 0
cpoint c2 -1.6939 16.256
arc p1 c1 p2 1.00
arc p2 c2 p3 0.75
arc p3 c2 p4 0.25
line p4 p5 0
line p5 WG0 0
}
zoff -0.8
point p1 4.76 0 2.5
point p2 0 13.462 0.5
point p3 1.57 16.256 0.5
point p4 0 19.05 1.0
point p5 0 19.55 1
cpoint c1 -16.6522 0
cpoint c2 -1.6939 16.256
arc p1 c1 p2 1.00
arc p2 c2 p3 0.75
arc p3 c2 p4 0.25
line p4 p5 0
line p5 WG0 0
}
Documentation how single line format to describe a dome tweeter works: https://www.diyaudio.com/community/...he-easy-way-ath4.338806/page-623#post-7353694
I haven't tested that one. You could try this: https://www.somasonus.net/scanspeak-d3004-6600. No guarantees though.
Any experiences, precautions, tips / tricks you may have= regarding protective screen removal from the Bliesma T34B? That's one tweeter I'd hate to damage the dome on.
I took some pictures of what I did and described the process here, much simpler and less dangerous in practice than I thought it would be 🙂
https://www.diyaudio.com/community/...-and-purifi-6-5-aluminium.413697/post-7712944
https://www.diyaudio.com/community/...-and-purifi-6-5-aluminium.413697/post-7712944
Don't use a heat gun on these drivers 😳
Just take it off, the glue is not that strong, it's only for fixing the grid. I use a small hex screw driver (not pointy), put a pencil under it to create a lever and lift a few mm. Do this at 3-4 points and it comes off. There is a picture of it somewhere buried here, sorry couldn't find it now. No need to heat anything!
Just take it off, the glue is not that strong, it's only for fixing the grid. I use a small hex screw driver (not pointy), put a pencil under it to create a lever and lift a few mm. Do this at 3-4 points and it comes off. There is a picture of it somewhere buried here, sorry couldn't find it now. No need to heat anything!
Same observation with t25b-6.
I was surprise that the grill comes off very easily without heat.
I've used chopsticks inserted in the holes.
I was surprise that the grill comes off very easily without heat.
I've used chopsticks inserted in the holes.
Just wanted to reinforce what others said already, this whole enterprise is such an amazing project! I've been reading the first ten or so pages, jumped in the middle, and seeing the huge number of iterations on various designs, I think it's incredible how much effort @augerpro and others put into this.
I am trying to get back into diy now and I was thinking something around the Audax TW034. Will the waveguide designed for Bliesma T35B work?
I've been reading in this thread that T35A will not work as well because of the taller dome. The Audax dome appears to be 11.5mm tall but I could not find any info on the T35 variants.
Thank you!
I am trying to get back into diy now and I was thinking something around the Audax TW034. Will the waveguide designed for Bliesma T35B work?
I've been reading in this thread that T35A will not work as well because of the taller dome. The Audax dome appears to be 11.5mm tall but I could not find any info on the T35 variants.
Thank you!
It appears I cannot edit the post above anymore. Most likely it won't work well because TW035 and T35A have similar dome profiles. Any suggestions on how would one start to modify the T35B waveguide to fit the Audax?
hi augerpro again,
Is there any progress about model 1 or model 2 diy 2 way speaker project?
Is there any progress about model 1 or model 2 diy 2 way speaker project?
Life got really busy this summer, so I haven't been able to to anything with audio. I have free time now, I may even finish some prototype boxes this week.
I'm pretty sure I will go with 8 ohm. I figure as this is the budget model, they would likely be used with AVRs and 4 ohm might be an issue. Yes these are one of the prototypes. The background was that after I finished the work on the Model 2 (SB "ceramic" drivers) and validated it on Erin's Klippel, I was not satisfied with how complex the crossover was. At that point I had only designed around a baffle with roundovers, working under the premise that a smooth transition from waveguide all the way around to the sides was best. I decided to revisit this in ABEC and see if chamfers might simplify the crossover while keeping the excellent results I had. The ABEC models looked promising, so I've built a new prototype with both chamfers and round overs. I decided to sim all the other "families" at the same time and build boxes to measure which would be best for those too, since it differs a bit when you are trying to design a baffle who's diffraction signature complements the natural response of the drivers used. I actually have the boxes built and I'm just in the process of routing cutouts for the woofers and waveguides.
Some improvements made with the printing on the Bambu XC1!
There's a horizontal ridge on top and bottom from the transition from radius to the mounting flange.
This appears in the stl file. Is the ridge on this model only? We might try to smooth that out for next print..
There's a horizontal ridge on top and bottom from the transition from radius to the mounting flange.
This appears in the stl file. Is the ridge on this model only? We might try to smooth that out for next print..
