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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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I have drawn up my 20Hz subwoofer horn in Google SketchUp 3D. This horn is more for home theater than for music. My smaller 40Hz loaded with B&C Speakers 8PE21’s is more musical and articulate. The 20Hz tapped horn is loaded with two Tang Ban...
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[quote user="ulf"]One advantage of the use of a phase plug in a midbass horn is that it will beam less at higher frequenzies than a horn without phase plug. If the phase plug is designed for the specific horn and driver it will help "steer" the HF.
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[quote user="jessie.dazzle"]The thraot size will be 7 inches. [/quote]
Wow, THAT IS BOLD!!!! The 45Hz how from 7” throat – that is very-very cool and very positively-obnoxious.
[quote user="jessie.dazzle"] Yes I have thought about paying someone e...
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[quote user="Jeffrey Jackson"] so, my straight horns... I like them very much.. I built mine similar in style to what Greg B linked, but obviously much smaller.. mine are just under eight feet long (length of a sheet of plywood) and have a mouth roug...
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First let me say I am NOT trying to promote the Synergy horn. I just think it is very intresting to look at and to think about.Ideal loading only occurs at a singular frequency within any horn. This ideal loading point is where the length is 1/2 a wa...
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Romy wrote :
"...BTW, in your scenario the center pipe that is sitting in the throat looks like smaller then 1.5”. Does it mean that you will eventually open up the horn intake diameter with sand paper until the throat hit the S2’s output diameter...
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[quote user="Dominic"]I'd put your sub horns above your head. There are some big issues with that but you save a lot on concrete engineering, and assuming space remains in future you could apply what you learned from the overhead wood horns to a more...
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The system is still very much a work in progress, but I have come to the conclusion that the concept as such is very, very good. It's only up to me to make it sound as well as I know it is capable of. Making and fine-tuning the crossover might take m...
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[quote user=""]...The most obvious problem is with the Bass drivers, which are left to radiate both to the front (via the horns) as well as to the rear... which in this case really means to the front!... The rear of the drivers are aimed upward at a ...
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Dear Malinowski,
Here are the input data used in the HornResp simulation for the tractrix midbass.This is a 117cm long tractrix horn with the TD-1201. Throat area 84 cm2, mouth 10000cm2 with 5,6 liters back cavity.Ang: 1Pi; FTA 89,80; S1 84;...
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Ah, your horn this way does not have own axis and the axis of the back plate become actually the axis of the horn? This way you get rid the ugliest element of co-axising – the integration of the axis of horn and the back plate. Very-very cool indeed!...
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Romy
Your rules say no direct answers so forgive me this one.
My horn is a true 21Hz horn.If you want to do the calcs:(More or less) Throat 6264 square cm.Mouth 48312 cmsq.M or Q 0.7 depth 3m.Quarter space loading.It does not quite make 21Hz.-3...
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[quote user="jessie.dazzle"] I might be totally wrong, but I just assumed that Vitavox's decision to specify a lower impedence voice coil for horn-loaded applications was related the additional load placed on the driver once mated to a horn, resu...
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[quote user="de charlus"]Alas, I am too young to have that whole "Mirrorphonics nostalgia" coloring my taste in sound reproduction - still, this is not to say that it cannot be investigated. [/quote] Actually the "Mirrorphonics nostalgia" that some p...
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This project just woke from a long slumber.I've been granted access to tools and people to move this forward. The tools are a large-scale CNC cutting machine and paint shop, used to fabricate volumes (large 3D shapes) attached to climbing walls at i...
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This weekend I am starting to draw the sketch and the preliminary building plan for my midbass horns. I initially thought to recruit somebody who have done it to help me with plan but after consulting with a few people I feel confident that I hav...
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Pretend
a driver diaphragm, any driver. From front diaphragm "sees" the horn
throat and the mass of air in the horn that diaphragm needs to
"push". This creates let call front spring. If a driver has a front
chamber than let discard it for now. ...
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[quote user="ulf"]A few years ago we discovered the tractrix horn for MF use. It was really the most important improvement so far. No more honking exponential horn sound. The improvement was so clear that A/B testing was not needed. [/quote]
For wha...
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Since I started this thread I have received a number of emails from people bitching that I do not like this, criticize that and that they can’t figure out what I do like. I reply to them invariably – “Do not read my site as you are too much a Mor...
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Of cause it shall be mentioned in the context of thin there that there is always the ALE Acoustic solution. The Japanese ALE Acoustic make two midbass drivers: P1260 and P160.
http://ns.tachyon.co.jp/~sichoya2/ale/drivers.html
In ...
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I have been running around this design for a couple of months...I re-designed it just now to change some numbers according to your post. The main idea is to have a lot of posibilities in a huge horn:It is formed by conical sectors th...
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Thinking further about my "Hanging" inverted Midbass J-horn presented above I asked myself: where is to cut this 12’-13’ horn hypothetic horn. Initially I thought to do it in order to keep the parts smaller to be able to fit them through the doors an...
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The horns that Stereo Lab make are very good, especially considering the relatively modest prices. I bought the "Ultra-Fi" version of the 140Hz horns and they are of course not completely free of resonance - JLH's and Romy's massive horns are cer...
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[quote user="cv"] The acoustic transformation's probably done by the time the wave reaches the throat. [/quote]
Yes, it is. If we loom how the S2 internal channel done then it would clearly indicate the it should not be a great tweeter but wha...
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AlloI had a theory that the bug screen was helping to damp horn modes/refelctions caused by a mismatch between the S2 internal flare and the horn flare rate. I have 340Hz flare JMLC horns, which may be expected to give less of a mismatch than the sma...
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Ronnie,
Very nice, though I do not know where you would like me to move the thread. (It looks like it’s OK where it is). There are some comments that I might to pass.
You decided to go for a large MF driver. This is fine if you like it but I ...
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Thats interesting... When Slatkin was music director and conductor,,The St Louis Symphony was voted No#1,, i dont know how that standing came about..Some politicle shananigons i presume.. Most of the Slatkin recordings were produced for RCA at that t...
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Romy, I use MDF primarily, plywood occasionally and solid wood if I am forced to.
Round horns are precision CNC made within +/- 50 microns.
However, during sanding and finishing process the accuracy is somewhat s...
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Romy, may be the alnico jbl 2482 + aluminium diaphragm (plastic surround) would suit for your application here. I tested such driver on 200 hz tractrix horn and worked fine. Went down well under 200 hz and is 2" throat. It is heavy but I would be usi...
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There was yesterday somebody at the Audio Asylum sewers, asked about possibility of building a multi-way horn installation but he did not want to cut own horns. I posted a reply that the AA dirt of course was vandalized. I intended it to and replay p...
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