Per Prof. Leach's math, it's a 0.462 M[T] hyperbolic flare beginning with a ~62.72 cm^3 filter chamber/~24.61 cm^2 throat [St], so will be much longer than its basic 1/4 WL; too long/big for Hornresp to sim in fact, though might if corner loaded, but it won't be accurate unless the horn is setting on an acoustically large enough open space with equally large/rigid walls to support the propagation of an 8.8 Hz long 'train'.
GM
GM
does it starts hyperbolic->exponential ...or hyperbolic->conical->exponential ?
for those who are able to use the basement of their house as a horn throat extension and both childrens rooms for horn mouths it's possible, but such a construction is to heavy for me !
thanks for the calculations GM
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I think I said "in an enclosure of this size" - referring to FE108 Sigma in the original Vivace - as we heard in Bernie Foucher's pair a while back. "Give me a long enough lever .... " - maybe.
The Vivace was a very pretty cabinet for sure, but I'm confident that any of several far less complicated or controversial designs I've heard or built over the past half dozen years would get far closer to the bottom end of the scale - without distress or contravening the laws of nature.
The Vivace was a very pretty cabinet for sure, but I'm confident that any of several far less complicated or controversial designs I've heard or built over the past half dozen years would get far closer to the bottom end of the scale - without distress or contravening the laws of nature.
You're welcome!
Right, with a [mostly] subterranean basement covered with a rigid/massive enough 'top'/room floor, room gain would allow it to be much shorter, though still fairly large.
To be usable over such a wide BW though requires it be front loaded, so in this case the driver's 'face' would ideally need to be vented into the open air, though in reality I found that a ~100x Vas enclosed space is sufficient.
Bottom line, for 'sub' duty with a < ~120 Hz XO, the larger the driver and Qts [within reason], the lower its Fs, Vas the more suited it is, so one normally has to use multiple drivers in socially unacceptably large cabs to go below ~16 Hz at 'only' THX reference [115 dB/LP].
GM
Right, with a [mostly] subterranean basement covered with a rigid/massive enough 'top'/room floor, room gain would allow it to be much shorter, though still fairly large.
To be usable over such a wide BW though requires it be front loaded, so in this case the driver's 'face' would ideally need to be vented into the open air, though in reality I found that a ~100x Vas enclosed space is sufficient.
Bottom line, for 'sub' duty with a < ~120 Hz XO, the larger the driver and Qts [within reason], the lower its Fs, Vas the more suited it is, so one normally has to use multiple drivers in socially unacceptably large cabs to go below ~16 Hz at 'only' THX reference [115 dB/LP].
GM
yes, we all need one of these lurking underfoot - makes Nelson Pass' El Pipe-Os look like a Bo$3 acousti-mass band-pass system 😉
just kidding
just kidding
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
It seems left channel is already playing a tune. Hmm, is it Antônio Carlos Jobim's "Girl from Ipanema" or John Lenon's "Woman" ? 😀
Anyway, think about the possibilities in such a big horn. Daddy is sitting in the sweet spot while his wifie is sent into the horn, with a pillow for tweaking/damping purpose.
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It's a 0.462 M[T] hyperbolic flare factor, 8.8 Hz flare frequency all the way from throat [St] to terminus [Sm].
GM
I thought it was obvious that I was zeroing in on the "or possibly any, including a Kleinhorn." with the reality being that it's capable of loading a many times larger horn, which was done strictly as a 'what if' scenario and as I noted, not useful in reality, i.e. just a piece of mostly useless audio trivia I felt like posting.
GM
FWIW, the one I simmed makes even this one seem like a tweeter horn in a size comparison.
These would be a smaller version of its mid bass BW section, so continue the expansion at both ends till you get to the tiny throat and 8.8 Hz mouth area to get to a truncated version that won't be quite as flat down low as the sim due to having a near 2x 'faster' flare frequency, ergo presumably a 'faster' flare factor to match it: Desibel, the world’s largest mobile horn system | Maja Solveig Kjelstrup Ratkje
All things considered, for virtually all HIFI/HT apps a [super] large OB or IB array of woofers ['12 dancing Shivas' manifold basement IB or similar] combined with large driver 'stub' mid-bass horns to bridge the gap to the mid horns, etc., would be a better choice overall than any basement size wide BW horn and probably won't cost as much.
GM
Just like Maja, a guy named Colin Furze is also a master in sending sound across sea ( all the way from Dover to Calais ) with a kind of Butt Horn :D
Check the 3 videos out here:
Fart@France - COLINFURZE
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sorry, I'm often too focused on some quick smart-alecky retort, and oblivious to the obvious
yes, I can imagine that should the building's construction withstand it, 12 dancing Shivas ( wasn't that Tom Nousaine's configuration? ) or the like would satisfy all but the most extreme obsessive bass hound.
The atlier first horn with the plate mod did go low and, to me it did sound good to my ears. What I liked about it is it was small compared to the others I've seen. The vivace has thick walls with fancy veneer but, the designs internal is basically the Same as the first horn. What other designs that is small as the atlier first horn that will produce deep bass and simple to make? I have a pair of 108ez and fe103 sol that I want to play with a small enclosure and simple to make.
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For those interested, Hornresp will simulate a mass-loaded horn. To create the acoustic mass element, first model a sharply tapering section of horn to emulate the closed end and then model a section with the cross-sectional area of the port and minimal expansion to emulate the straight-sided port. I think MJK's ML-TL worksheet will also model an enclosure like this (or similar), if the line is modeled to expand toward the terminus.
What you are doing is taking the wide bandpass characteristic of the horn, and then using the mass element to pile up all that acoustic gain over a narrower bandwidth (the effect of mass-loading a line).
What you are doing is taking the wide bandpass characteristic of the horn, and then using the mass element to pile up all that acoustic gain over a narrower bandwidth (the effect of mass-loading a line).
Those have a pair of my drivers. FE126eN (or maybe FE127eN). Early ones with EnABL 1.
dave
Yes they did and they sounded wonderful with my 45 SET. The pair use to belong to a audio reviewer, he has a review on your site.
FH3?
but to extend as deeply as the Vivace was original reputed to attain, I'd nominate something like an Alpair10.3 in Pensil, or larger FHXL
TANSTAAFL
Based on comparisons with Bernie's Vivace with FE108eSeN, FH3 is a better horn (bass included)
dave
dave
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