I think that what I said was that the accuracy isn't critical, but the algorithm needs to have something in the back to estimate from. I tied to just assume that the response goes to zero, but this worked poorly - the reason being that there is actually a bright spot dead on the rear so zero is a bad assumption.
Two things; 1) Time lock a series of measurements; 2) export a series of measurements as a single file.
I'm not comfortable running my 1" exit cds down to 500hz, sorry. I think when I xo to the woofer at 800-900 the directivity will be just fine in the horizontal.......it was with my 15" waveguides from earlier in this thread. Earl's 18" wg on the NS-15 does well and I think he crosses around 800hz.
It's been awhile since I read the REW docs, but I don't think it uses the Farina method for the log sweep like Holm and ARTA........don't hold me to that though. You can do a dual channel measurement in REW which should work like the time lock in Holm. I prefer the dual channel method when looking at phase for xo design.
Waveguide mold! Took over an hour to get it pulled off.....I thought I was screwed.
It turned out much better then I anticipated. I didn't get the glass laid down very well at the entrance but it's not too bad.
An externally hosted image should be here but it was not working when we last tested it.
It turned out much better then I anticipated. I didn't get the glass laid down very well at the entrance but it's not too bad.
Funny you should ask! I'm in the middle of converting the horns I built in this thread to synergy horns. I have another thread where I did some experiments using the original horn converted to a 2-way synergy. Detailed data there, and I'll be posting data of what I'm working on right now.
My plan was to build a larger version of this wg for a synergy horn but I'm not too excited about building anything larger by hand. I might try to modify these by making a much larger mouth round over....
How is yours coming?
Good to hear from you! I'm in the very early stage of experimenting. I have bought an large round Ikea basket made out of metal. it's 61 cm in diameter. I'm trying to stretch some swimsuit fabric out like you did. I'm going to try to spray paint the fabric, one layer at a time, until it hardens. That way it hopefully holds it shape until it is hard enough to remove from the basket. Later I plan to use epoxy. But right now, my challenge has been to fix the fabric evenly to the ring of the basket. Brown packaging tape loosens up. Maybe i'll try duct tape. Do you have any suggestions?
KVISTBRO Storage table - IKEA
KVISTBRO Storage table - IKEA
Thanks for inspiration guys! Too bad I have not come further yet...slow progress now.
Thick cotton stretch fabrik and a swim ring...
https://www.google.se/url?sa=t&sour...ggfMAA&usg=AFQjCNElSTJi7f-GZ3REFr05sj8UXgu_5w
Petter
Thick cotton stretch fabrik and a swim ring...
https://www.google.se/url?sa=t&sour...ggfMAA&usg=AFQjCNElSTJi7f-GZ3REFr05sj8UXgu_5w
Petter
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