Hi mRgSr,
http://www.diyaudio.com/forums/subwoofers/190635-th-18-flat-35hz-xoc1s-design-70.html , Post #693 by Tom Danley.
Regards,
http://www.diyaudio.com/forums/subwoofers/190635-th-18-flat-35hz-xoc1s-design-70.html , Post #693 by Tom Danley.
Regards,
I finally got REW working (on my secondary computer (Windows XP) and a different USB soundcard. Took various measurements of this 5Fold prototype, which I've been holding onto for a while.
My tests are to realize differences with and without that short board at S1, with the S-baffle cutout (Djim option) vs with 3/4 baffle cutout (another Djim option), waveguide/extenders, compatibility/frequency response when coupled with a TH-18 and a couple other things. I'll post them soon. Getting calibration (SPL meter & REW) just right takes some time at first. Has been quite addicting.
Two questions:
1. Although REW can measure impedance (with extra parts), I own DATS. Am I right in thinking this will work up-to-par, measuring impedance with the drivers loaded in the cab (in addition to purely measuring T/S parameters in free air)?
2. Anyone up to getting a symmetrical fold going for this 5Fold? If not, I'll move forward with the current plan. I'm purchasing multiple sheets of 3/4" birch ply on Monday (5'x5' for $40, or 4'x8' for $67). I need to complete 4 cabs by the end of the month. I'd love to learn how, but this might not be a one-day process for my first time. If it's not, there's another design I have in mind I could study for and practice folding (will be another thread).
My tests are to realize differences with and without that short board at S1, with the S-baffle cutout (Djim option) vs with 3/4 baffle cutout (another Djim option), waveguide/extenders, compatibility/frequency response when coupled with a TH-18 and a couple other things. I'll post them soon. Getting calibration (SPL meter & REW) just right takes some time at first. Has been quite addicting.
Two questions:
1. Although REW can measure impedance (with extra parts), I own DATS. Am I right in thinking this will work up-to-par, measuring impedance with the drivers loaded in the cab (in addition to purely measuring T/S parameters in free air)?
2. Anyone up to getting a symmetrical fold going for this 5Fold? If not, I'll move forward with the current plan. I'm purchasing multiple sheets of 3/4" birch ply on Monday (5'x5' for $40, or 4'x8' for $67). I need to complete 4 cabs by the end of the month. I'd love to learn how, but this might not be a one-day process for my first time. If it's not, there's another design I have in mind I could study for and practice folding (will be another thread).
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From what I have used DATS worked just fine doing impedance sweeps. I know others said it can be finicky at times though.
I would wait to hear from EP or others for the fold. Since trying to finish a few designs myself I am starting to understand how to fold now. BUT I wouldnt want anyone folding my designs and then becoming upset it was perfect.
Speaking of I need to get started on my prototype.
I would wait to hear from EP or others for the fold. Since trying to finish a few designs myself I am starting to understand how to fold now. BUT I wouldnt want anyone folding my designs and then becoming upset it was perfect.
Speaking of I need to get started on my prototype.
just a general cone correction for 18"
in here you find the stl files for cnc routing
btw,this is the bracing for 4 subs ,1 sheet 122x244
61 cm wide external
in here you find the stl files for cnc routing
btw,this is the bracing for 4 subs ,1 sheet 122x244
61 cm wide external
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just a general cone correction for 18"
in here you find the stl files for cnc routing
btw,this is the bracing for 4 subs ,1 sheet 122x244
61 cm wide external
Images don't seem to be working.
Maybe it might be best to include them as attachments with your post? They'll be hosted off the diyaudio site and therefore always accessible as long as the forum remains accessible (same site).
