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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Join Date: Jan 2011
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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Location: Texas
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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Location: California
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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Join Date: Apr 2010
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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