Crescendo posted cut sheets in post 773-775, and measurements around # 955-969.
Any design is "playable".
If you skip building the cabinet as Crescendo did, it won't have the same response as he posted.
Lol , what I mean is that if we omit cone correction it will be not catastrophic to sound horrible peaky or just burn out the driver.
Martin (Xoc1) and others had much discussion about "cone correction" or what Tom Danley called a "stub" that he uses in many of his commercial TH designs.
Xoc1 did not include the "V" throat stub in his plans for the TH-18 as it became too much of a clone of the DSL TH-118.
Post #912, 921, 927, 987, etc. and #2343.
https://www.diyaudio.com/community/threads/th-18-flat-to-35hz-xoc1s-design.190635/page-50
Anyway, driver "burn out" or "rocking the cone to death" are different catastrophic failures, thermal or mechanical 🙂 .
Art
Xoc1 did not include the "V" throat stub in his plans for the TH-18 as it became too much of a clone of the DSL TH-118.
Post #912, 921, 927, 987, etc. and #2343.
https://www.diyaudio.com/community/threads/th-18-flat-to-35hz-xoc1s-design.190635/page-50
Anyway, driver "burn out" or "rocking the cone to death" are different catastrophic failures, thermal or mechanical 🙂 .
Art
OK, not quite sure if I understand since the specs in HR are different from the DS115, but with either specs I see nothing wrong other than its near 3:1 CR is pretty high for such a powerful output driver.
If wanting a more optimal alignment, its specs 'wants' a small ~46 Hz tapped pipe (TP) or horn (TH), which can in theory handle all 3400 W 'fast' transients.
If wanting a more optimal alignment, its specs 'wants' a small ~46 Hz tapped pipe (TP) or horn (TH), which can in theory handle all 3400 W 'fast' transients.
Unfortunately I would say that sort of peaked response is what I have found when Simming the B&C DS series in existing tapped horn designs.
Is there any way I can make it perform better (ie with careful EQing) or am I doomed with the wrong drivers? Sorry if the questions are dim, it's my very first build.
Hmm, need to keep in mind that HR doesn't account for any acoustic damping, so in reality its actual response will be somewhat smoother plus a TP, TH is basically a two octave alignment, so you'll need to EQ/XO it above 80-100 Hz, which just leaves some EQing to suit the needs of the app, if any.
In short, had you simmed a typical BR-like flat response it would be severely over-damped (rolled off on both ends of the gain BW), so in the future 'shoot' for ~ +/- 3 dB with equal amplitude peaks.
In short, had you simmed a typical BR-like flat response it would be severely over-damped (rolled off on both ends of the gain BW), so in the future 'shoot' for ~ +/- 3 dB with equal amplitude peaks.
Hi guys, been lurking for a while without an account but I now need to actually get on with choosing a design to build to replace our current Super Scoops.
Really liking the look of the epa design FT30 that CRESCENDO built - defo makes more sense for us dimension wise than the Xoc1 TH18.
Has anyone considered a version of the design without the cone correction (for simplicity and less risk to the driver) - kinda like a Mk1 TH18 in the form factor of the epa/CRESCENDO FT30? How would I go about adjusting the plans to do this
Has anyone got a design of the FT30 with the stacked plated cone correction method for construction simplicity? obviously this does loose a little in volume/horn length. Alternatively, could stacked circular plates be used with a max diameter less than the baffle cutout, so that the correction can be installed after completing the cab.
If cone correction is uses, what's the best approach to take to ensure the cone does not collide with the panels when driven hard?
Has anyone also considered loading this design with any Precision Devices neo drivers? Specifically the PD1845-1n and the new PD1845-2n. I've done some very amateur hornresp (attached below) and I can't see any obvious issues although there is a considerable chance I've made an error somewhere.
If anyone can offer any input/help/advice it would be greatly appreciated.
Cheers!
Sam
Really liking the look of the epa design FT30 that CRESCENDO built - defo makes more sense for us dimension wise than the Xoc1 TH18.
Has anyone considered a version of the design without the cone correction (for simplicity and less risk to the driver) - kinda like a Mk1 TH18 in the form factor of the epa/CRESCENDO FT30? How would I go about adjusting the plans to do this
Has anyone got a design of the FT30 with the stacked plated cone correction method for construction simplicity? obviously this does loose a little in volume/horn length. Alternatively, could stacked circular plates be used with a max diameter less than the baffle cutout, so that the correction can be installed after completing the cab.
If cone correction is uses, what's the best approach to take to ensure the cone does not collide with the panels when driven hard?
Has anyone also considered loading this design with any Precision Devices neo drivers? Specifically the PD1845-1n and the new PD1845-2n. I've done some very amateur hornresp (attached below) and I can't see any obvious issues although there is a considerable chance I've made an error somewhere.
If anyone can offer any input/help/advice it would be greatly appreciated.
Cheers!
Sam
Attachments
that new PD 1845-2n is YUMMM!!!! YUM!!!!
sadly in USA they hijack the price, again i wish to live in EU... where you can get that driver
for what the PD web site says
here that will cost around 580 or 600 USD 🙁
I have something that i collected in my stash of SUB plans
browsing trough all the FT30 thread
it was XOC1 who made something called the 6FOLD TH
basically it was his TH18 but moded to hit 30Hz and no cone correction
just plain folding AKA. the SS15
i can UL the plans if you like
he added a compression plate ( like the CV L36) cause he used the 18TBX100
but i guess you can remove it for the PD driver
and btw, the PD 1845.n2 sims great !
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