C/E/X PA Flat to 30 (FT30) PA TH Awesomeness - Page 77 - diyAudio
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Old 21st March 2013, 07:04 PM   #761
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I forget where I saw it. Ill look around for it and direct you.
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Old 23rd March 2013, 12:31 AM   #762
tb46 is offline tb46  United States
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Hi mRgSr,

TH-18 Flat to 35hz! (Xoc1's design) , Post #693 by Tom Danley.

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Old 17th January 2014, 02:41 PM   #763
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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.
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Old 19th April 2015, 12:30 PM   #764
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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).

Last edited by CRESCENDO; 19th April 2015 at 12:33 PM.
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Old 19th April 2015, 02:15 PM   #765
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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.
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Old 1st July 2015, 11:32 AM   #766
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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
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Old 1st July 2015, 12:42 PM   #767
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Its worth the money if you need more excursion than the 9000 can give.
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Old 1st July 2015, 12:56 PM   #768
epa is offline epa  Netherlands
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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.
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Last edited by epa; 1st July 2015 at 12:58 PM.
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Old 1st July 2015, 12:56 PM   #769
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@ 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?
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Last edited by Sabbelbacke; 1st July 2015 at 01:11 PM.
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Old 1st July 2015, 01:08 PM   #770
epa is offline epa  Netherlands
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i just moddeled them in hr,and yes they have the same excursion and power ratings.
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