🙁 he will be greatly missed, but we still have ( and i will not name in a specific order) patrick bateman, weltersys, neodan ,brian steele, jbell and even he do not come here often, Ricci, if i forget to mention a big name i appologize, just spitting off what come to mind.
Has anyone tried modeling this sub with the Eminence Kappalite 12" ?
(I haven't yet learned how to model horn subs.)
Now that I have some pretty good 2 x 12" reflex subs (Thanks again, Art !) I'm ready to try a TH design, but it must be as light as possible and I'd love to be able to use my existing Kappalite drivers.
FWIW, I read that Eminence now offers this driver in a 4 ohm version as well, though it's hard to find much hard data on it.
I have the 4 Ohm version. I purchased it from Parts Express. Looks like they don't stock it any more...
https://www.parts-express.com/Emine...ower-Neo-12-Subwoofer-4-O-290-4518?quantity=1
https://www.parts-express.com/Emine...ower-Neo-12-Subwoofer-4-O-290-4518?quantity=1
This guys also listed the 4 ohm version but out of stock
you can call them or email them to see if eminence will still going to supply them
other option is to use 2 8ohms in parallel , double the power rating 🙂 but then you need to modify the design for dual driver 🙂
https://www.loudspeakersplus.com/Eminence-Kappalite-3012LF-4-p/eminence-kappalite-3012lf.4.htm
you can call them or email them to see if eminence will still going to supply them
other option is to use 2 8ohms in parallel , double the power rating 🙂 but then you need to modify the design for dual driver 🙂
https://www.loudspeakersplus.com/Eminence-Kappalite-3012LF-4-p/eminence-kappalite-3012lf.4.htm
The sim just for you!
The Kappalite 4012LF can't take much power without flapping the cone in this design.
The 4012LF is great in small BR, not so good in a large low tuned TH, output to enclosure volume is poor.
At 34.5 volts, about 210 watts into the impedance minima of 5.7 ohms, reaches Xmax (9.1mm).
Looks pretty flat from 40-100 Hz, but only 120dB, not much for a 10 cubic foot box.
A pair of these loaded with the Kappalite 4012LF would be larger (and heavier) than a single Keystone or Xoc1 TH18, but have around 4dB less output.
I'd suggest adding more of your "pretty good 2 x 12" reflex subs" and some "barn doors" if you want more output and want to stay light.
Art
Thanks, Art. I sure do appreciate you running that.
I'm really looking to try a TH design more for the different sound quality than for more efficiency.
Those 2X12 reflex subs I built are good, but don't put a huge smile on my face, either. Still a little "tight & constricted" compared to the dream sound I have in my head. They might improve slightly if I make new ones with a P-P mounting, and I intend to try that, but horns supposedly sound very different.
As you know, I'm a big fan of the Danley TH212, but they are just too darned heavy for me. (145 lbs)
Maybe a dual 10" version of the same? Efficiency would go down, but I could probably carry 3-4 of them.
I'm really looking to try a TH design more for the different sound quality than for more efficiency.
Those 2X12 reflex subs I built are good, but don't put a huge smile on my face, either. Still a little "tight & constricted" compared to the dream sound I have in my head. They might improve slightly if I make new ones with a P-P mounting, and I intend to try that, but horns supposedly sound very different.
As you know, I'm a big fan of the Danley TH212, but they are just too darned heavy for me. (145 lbs)
Maybe a dual 10" version of the same? Efficiency would go down, but I could probably carry 3-4 of them.
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120dB is the same amount predicted for the 3012LF in a straight ODTL that's a lot smaller, albeit at a higher voltage. And the passband is wider and smoother.
What about Jbell SS15 ?
single 8x4 sheet of plywood
goes to 40Hz using the Kapalite 3015LF
and with just 375 watts@ 8ohms you hit around 128db with one cab
with 4 of those cabs you will make some noise
That's more of a 50 Hz design than a 40 Hz design.
The 3015 is also a different driver.
Interestingly enough, you can get to 40 Hz in a similar-sized box using the 3015, with similar peak SPL too (and of course more under 50 Hz). You'll just need to provide more power.
Yeah, I've seen that JBell, Brian, thanks. I don't think its pros & cons quite balance out for my particular application.
I'm really fond of having decent LF extension, but need portability. Ughh.. With BR, after massive amounts of research and thinking, It seems to me that a 2x12" cabinet is the sweet spot. - But that becomes a weight problem with a TH box.
Like Art said, I may just need to use more BR boxes (I planned on having three, anyway) but I'm dying to try TH.
I'm really fond of having decent LF extension, but need portability. Ughh.. With BR, after massive amounts of research and thinking, It seems to me that a 2x12" cabinet is the sweet spot. - But that becomes a weight problem with a TH box.
Like Art said, I may just need to use more BR boxes (I planned on having three, anyway) but I'm dying to try TH.
Hey Brian,
so how your proposed mods to the box will look
i do not know how to translate hornresp screens to actual cabinet dimensions.
i will like very much to evaluate it as an option to actual make a pair and then another pair.
does they hit lower in pairs or is the same ?
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Yes, very similar, though my Vb is a bit larger.
Sadly, I think all my notes are on a hard drive that recently died (I'm trying to recover the data now)
Art W probably still has his notes on this design. (A very slight change to the suggestions I got from Jerry McNutt @ Eminence.)
My gross Vb is a bit over 5 cft. I forget the actual Vb. Reflex cabinets aren't exactly rocket surgery, so...
IIRC my boxes are tuned to 39 Hz.
I used 1/2 ply for lighter weight, with carbon fiber rods inside for reinforcement. They are larger than the JTR's yet weigh about 5 lbs less. The hardest part was getting the ports right, especially as my boxes are very shallow. The end result is surprising loud, and reasonably punchy. However, they still have that "bass reflex" muddiness and tightness. Re-making them with a semi-clamshell P-P mounting should help a little with the muddiness, (based on my own personal experiments) and so that's another project for the spring.
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Anyway, still thinking hard about a TH design that will ride that line between LF extension and portability. Possibly this one, or ideally Art's design but with a 15" driver. Or even a 10" version of the Danley TH212. - One of these might be workable if I use some high tech material, but of course that will be very expensive. - And it could end up an expensive failure. 😢
I would love to have a plan copy of your dual12 cabinet.
I saw a guy who used some cloth and epoxy to make light cabinets, lighter than 1/2" ply, over the AVS forum.
Let me se if I can get the thread back.
Btw Art design with a 15 neodymium and 1/2"ply with carbon fiber reinforcement can be what you looking , maybe loosing some SPL, but you can add more cabinets to compensate , since they were light, your back will be happy 😁
And mine 2, me no kiddo anymore. 🤣
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