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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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You have identified the tricky parts -the transistion between the front and back horn as well as the throat of the front tractrix horn. A one to one throat with the front horn works best with my coaxials and a short 1.25" straight 'ring' ...
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I am not quite sure what is going on but wherever is going on is wrong. I was listening this morning Shostakovich’s second cello concerto by Berlin and Rostropovich and I detected that something was not right. It was too direct and “too stereo”, if I...
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[quote user="jessie.dazzle"]For your rear chambers, as they will be adjustable, it would be smart to go with a max volume that is larger than the max you estimate to be necessary. [/quote] The size of rear chamber is something that dials in the compo...
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Ming,
thank you very much for resonance information, it explains a lot about the SG145LD4’s suspension. Still, my primary interest was not how folks out there build 20Hz of 24Hz horns but about ability to use the SG145LD4 properly for smaller horns...
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Ronnie,
The stuffing the back chamber in upper bass horn and stuffing a sealed enclosure have totally different purposes. In the firs case we need to decrease volume of the chamber in the second to increase it. The polyurethane foam spray is not foa...
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I’ve been thinking about all this electricity stuff…
I’ve stopped using all power conditioning devices since Bush got re-elected, and I consequently left the country to start a new life in the land of 220v/50Hz (this BTW, is not an exaggeration).
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Being a musician, I deal with constructive resonance every day. Tubes resonate as a function of length, boxes resonate as a function of the internal length, width, diagonals. Irregular shapes resonate as a function of volume, horns resonate as a func...
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I got this new midbass horn to replace the Edgar 80Hz straight horn. It is made by Funktion-One and they claim it plays down to 90hz. I could not get it to play below 120Hz and I am trying to figure out why.Pictures are:mouth measurements with no fil...
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Jorge,With the risk of being called a moron, I actually didn´t do any calculations more than using hornresp to get a decent spl-curve.The driver properties a got from a guy in Denmark who renovates old altec drivers. The numbers probably weren´t accu...
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Hi Romy, I ended up using a TAD 1101h 11 inch driver, 97db, 38fs, and is what I believe a stronger cone than the Goto 8 inch. The DIY mid bass horn is a 1/2 space 53hz hyperbolic horn with 5in x 5in square throat. Length is about 8'6", height of mout...
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[quote user="Romy the Cat"]
...this interesting point has no practical answer. First of all in the case of Rakesh horn what N-Set proposed is not necessary. Those 115Hz Hasqiun-style horns that Rakesh emulates are well dumped with own mass and own ...
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It was interesting, educational and in way embarrassing. Last night I send the directions to my carpenter to redo the third section in accordance to the original plan where the opening of the sections is more consistent. This morning he took the thir...
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The horns are painted with final coats. 240 feet of superb 6ga cable laid out to connect the horns (on the picture below). The sand bags sealed. The final bridges on the attic are built. The horns are almost ready to move up. I just need to hang the ...
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jd, I cannot see any of PDF files, probably my current networks kills them.
I do not know the AK150 drivers. I know AK157, AK151 and K15/40. If they have significantly lower free-air resonance, at 30-35Hz then I am not sure that they would be ...
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[quote user="ayebee"] 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 ….Present system consi...
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I recently completed some upper bass horns which I'm now enjoying very much. Sadly I lack the skills of someone like Jessie so my efforts are crude in comparison, but they are working well for me which is the main thing.I already had some old frontlo...
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Thanks, Jessie. I just will buy that Beswick Engineering valve, it looks like it is the right size and it look like it will do what I need
I made some experiments applying large gaskets to cover of the back chamber. I used a gaskets up to 12 mm but ...
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Thanks for the recommendations on crossover points and the image of the rear chamber on your Upper Bass horn...
I've been back into some virtual modeling of this large horn (having made one quite nice MF horn, I've proven to myself that I have no...
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Ronnie,
I’m sorry I was not able to detect the clipping you were taking about listening your file. However, if you can hear ANYTHING distorted at 1kHz (when ONLY your upper bass horn is playing) then you might consider the following: it has NOTHING ...
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[quote user="Romy the Cat"] I have to admit that since the torch of sane sounding horn-loaded loudspeakers nowadays in my hands (among the outspoken people with web presences) I feel sort of an obligation to comment about new interesting species ...
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This is the text that John posted a few years back at Triode Mafia. John allowed me to post it here warning that he have learned more about tapped horn since then and hat his opinion might have changed since then. -- *****************************...
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Guy, here some unconnected comments that you might find worth considering. They are in no order or importance, just random thoughts.
1) Talking and describing about horn we shall always mention at least 5 mandatory characteristics
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Moreart, somebody sent me this link last year. You are surely the DIY pioneer of back loaded Manger.As you probably know this is a touchy speaker to work with. Rated at 91 dB/W input by the factory, we measure ~91 up to near 92 dB/1W/1m in our two mo...
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I told before that I have high respect to Brian Cheney (because of multiple reasons) but I do not agree with his loudspeakers, where he tries to use ribbons wider range then they should be... Brian recently announced his new model VMPS RM V60. Since ...
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Hello Romy and everyone here, Thanks again for your thoughts on the large horns. It seems best to start a new thread, as previous threads dealing with the "10-Footer" originally began as discussions of other subjects. Romy, you may want to move previ...
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I have seen Beyma rewrite their specs when they redo a driver and even add a letter to the driver for that change, even if it is the same driver.Now I have seen variable FS responses form different drivers of the same model also. I was joking with a...
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Decays may not be only from your horn inside mouth ...Try to treat your back chamber(whole area of were your driver radiating sound ) with highly dense materials and use absorbers too.Use acoustic dampers like rubber where your horn mouth contacting ...
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Hello Macman,Nice horns, I like that you finished everything properly! I am getting tired of seeing piles of horns.I think the ringing you are getting from your midbass horn is that the throat reactance is not balanced. How did you calculate the ba...
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Romy,If you havent already, why not explore the Infinite baffle concept? Or a long terminated back chamber for that matter.Current drive should also be very good on the lower registers.Rgds, Collin...
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I woke up and thinking about the horn problem with fresh head I am thinking what did wrong. I did not measure the frequency response of the horn – I did not see a need for it – the sound of the thing is way beyond where it needs to be measured. I dis...
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