Member
Joined 2003
My new project page is up and running so I hope you enjoy the story of this latest journey.
The WTW was about 10 months in the making...most of that time was spent with the mid-tweet (1"x45" true ribbon). The baffles took just a few weekends to build.
(Apologies to those from the Mad board who had trouble with Geocities bandwidth...I've reduced image size to improve accessibility.)
WTW web page
The WTW was about 10 months in the making...most of that time was spent with the mid-tweet (1"x45" true ribbon). The baffles took just a few weekends to build.
(Apologies to those from the Mad board who had trouble with Geocities bandwidth...I've reduced image size to improve accessibility.)
WTW web page
An externally hosted image should be here but it was not working when we last tested it.
Paul W said:
is there any problems with midbass location?
Meaning any comb filtering problems having midbasses that far apart
Member
Joined 2003
The first null/dip within the woofer passband begins around 13 degrees off the vertical listening axis, and then moves lower in frequency as the angle increases. With a pink noise source, at normal listening distance, I cannot hear it moving my head from the floor, through on-axis, to standing.
Moving vertically like that, the dominate effect is the increase in higher frequencies as you approach listening height. Same result with a 1/6 octave RTA...midrange and top end slowly roll off above and below listening axis but little variation in the upper bass/low mid.
Someone here has asked similar/related questions...so here is a link to some really great freeware from the guys at the FRD Consortium. From them, I used BDS, ARPE, and VPR on this project. Try the 2D version of VPR first.
FRD Consortium
Moving vertically like that, the dominate effect is the increase in higher frequencies as you approach listening height. Same result with a 1/6 octave RTA...midrange and top end slowly roll off above and below listening axis but little variation in the upper bass/low mid.
Someone here has asked similar/related questions...so here is a link to some really great freeware from the guys at the FRD Consortium. From them, I used BDS, ARPE, and VPR on this project. Try the 2D version of VPR first.
FRD Consortium
Taco said:Wow, very nice engineering!! Not everyone can work with FEM.
FEMM's quite easy ... just need a little trial and error
Member
Joined 2003
Noob...LR4 ~600Hz
Miser, Taco...thanks...very satisfied for now...hope I feel the same a year from now 😉
Miser, Taco...thanks...very satisfied for now...hope I feel the same a year from now 😉
Member
Joined 2003
Agree, 600Hz is high for most 10". The W26 is designed like an overgrown W22 with copper shorting rings for low distortion, plus a very stiff cone with high breakup. Except off-axis, I think the 26 could go close to 1K...so blending isn't an issue. The ribbon is delayed 0.27ms which also helps on-axis integration.
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