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,
Has there been any revisions to this horn?
Curious if there have been any cone correction additions like in the Mk2 TH18?
Still tossing a few ideas around.
Curious if there have been any cone correction additions like in the Mk2 TH18?
Still tossing a few ideas around.
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).
Last edited:
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. 🙂
hi
want to build two of the flat to 30 th
i can get 18sound nlw 9000 for 365 euros
or nlw 9601 for 485 euro
same watts,near same db1w
9601 heavier cone
is it worth the exra money?
thanks
want to build two of the flat to 30 th
i can get 18sound nlw 9000 for 365 euros
or nlw 9601 for 485 euro
same watts,near same db1w
9601 heavier cone
is it worth the exra money?
thanks
first of i modded the design for a cone correction.cressendo got al the details, drawing and cnc files
the 9000 wil be a fraction louder where it counts ,it also moddels smoother.
i d go for the 9000
the rcf 18x451 is also a verry good option.
the 9000 wil be a fraction louder where it counts ,it also moddels smoother.
i d go for the 9000
the rcf 18x451 is also a verry good option.
Last edited:
@ chrapladm: The datasheet gives no difference in excursion between the 9000 and the 9601. Did you klippel them or is it experience or how do you get to this conclusion?
Last edited:
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
Last edited:
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).
