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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Some of you
have already seen my old posts about the 2 pair of concrete midbass horn a
friend and I built a few years ago.
Now I just
wanted to share what has happened to those beauties since the last po...
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I remember a couple year back I was observing how sound of playback interact with sound of the forest just out of my listening room. Somebody even proposed that it would be fun to have Mahler 7 complimented by the scream “off stage” life deer… Last n...
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Romy, Looking at your cartoon again, I wonder if you are showing manufactured trusses inside the horns?If not, what does the shading that looks like trusses mean to show?If so, your carpenters are either very good, very optimistic or very hungry.Are ...
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N-set, you may remember that from the beginning I encouraged you to try a wall mount, for all the reasons you have just cited, and this approach seems even more obvious if the walls are concrete/masonry vs. floor joists and sheet subflooring, not to ...
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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 refined bass setup. O...
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The sail ideas sound good, and I did play with it a little (before realizing the magnitude of this rooms acoustic problems).When you talk about diffusing effects, I think of reflections and reverberation that smears the sound so that it looses focus ...
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Go buy a load of tennis or racket balls and use them to float the horns. You can vary the number until you get just the right squish. As it is just the edge of the mouth that rests on the attic floor, this will require a some prep work... Here's how ...
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For some reason I cannot post pics, they wont upload to the server so I cant select them.The way Aurios work is with 3 ball bearings rolling inside a round chanel, something like an inverted doughnut...top and bottom.On the center they have a bol...
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Romy,you did not disappoint my expectation in your reply. Who can argue with the take: "bugger off and do some home-work"? On the other hand, when looking through that "Knowledge tree TM" it's more of a "forest" as far as horns are concerned. So it's...
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This is not a specific question but I would like to have some abstract general numbers in my head. Paul said somewhere that he is in building business, perhaps other are close to it. So, might I have a very approximate estimate for a project I descri...
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This is a fact but, you need to review literature relating to lightning/surge arresting systems. It is given in books such as the FURSE system because stranded conductors DO NOT WORK in that application. Flat tapes and small solid core wire should ...
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[quote user="Jorge"] …Most of us are using some sort of cabinet for the LF range. Romy was using the Scanspeak up to 75 hz crossed to his UBH, Haralanov is using those wonderful 23" woofers on an infinite bafle, and Jessie is using the McCauley 18"...
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Paul S wrote:"...In any case, I have never heard even a concrete LF horn that did not sound like a cave, a sewer pipe, etc..."I believe you; and this is why I am hoping these LF horns you heard were ineptly implemented.I would guess that the "cave/se...
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The more-driver/more-power method has in fact been used to very good effect in rooms that +/- eat bass. The set-up I remember had about 8 515s per side and LOTS of power that I suppose it did not actually use very often; but it did provide nice,...
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Herman, horn dimensions does not described by size of driver but only size of throat. It will be absolutely nothing changed in the horn dimensions if you go from between 10" and 12" driver. Sure you would need a bit larger back side of the horn to ac...
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Hi Romy,Got my new Le Cleach tractrix horns (320hz) for the Vitavox S2's. I'm x-ing over at 600hz with 2nd order 12db/Octave which I know is barbaric for you but it is all I have for the moment. With the new horns the S2s are puttin...
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Hi Guys,An idea I've had for damping thinner horns in a more or less aesthetically pleasing manner is to house the horn in a Sonotube rigid cardboard cylindrical concrete former, and then apply the desired damping material inside the Sonotube.&n...
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LED facade:Mind blowing!One thing is LED in the circuit as an indicator lamp or, say, SS bias and another is a LED bulb.The bad element in the bulb is the RF generator. The LEDs in the bulbs are not fed with DC or line freq. but withRF square wave. S...
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Of course the issue here is not so much time alignment as it is whether the physical structure will allow/facilitate decent LF. And of course "framed" structures eat some LF and create a +/- unpredictable LF environment.Two of many questions are, wh...
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After trying these reticulated foams for some time now, I ended up with using them only on the JMLC 1400 with the Radian 475 beryllium drivers. I had a smallish bump about where it worked. It flattened out and the sound changed a little. It sounded a...
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Jessie, you know I am not a horn guy. I played with horns for 5 years, and I have heard plenty of them, and so far none have worked for me, musically. But I have remained mindful of horns' potential, and I keep co...
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Thank you Ulf and Jessie,
I can't wait to get this started. Jessie I am going to send this plaster spec to my supplier and see if I can find something close..
In the past I would use plaster for creating a wax form.. then put the wax form into a s...
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Hello Romy and others,Ive been away for a long time taking care of my health but i'm back with renewed interest. I am moving to a new house in the future and have plans for a dedicated music room (and an occasional movie) The space is however much sm...
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Collin, I think you just got some excellent ideas from Robert, including practical use options for available square footage, and there is maybe more to Romy's responses so far than yields to casual inquiry.I haven't used horns for years, bu...
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Sorry, but I have to tell you that you do have it backwards on the skating forces. Just Google for a force diagram. Another way to know is to look at how the anti-skating force is applied in arms using the weight, pulley and monofilament line approac...
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N-Set, I do not claim to add to the facts you have already comprehensively given, I am merely asking about the logic, and I do not suggest to have a definitive answer, hence my ending with a question. I can see three reasons why other people use spik...
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Yes, the raised-floor-with-vaulted-ceiling rooms are very hard to charge properly. Perhaps you might at this point begin to work on some of the floor sink treatments discussed up this thread?The corner "nook" can be framed in, if need be, with a doo...
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We should define some borders here; LF, when you have an UBH, should be from around 100 hz down to 30 hz, where the last fundamental tone of an instrument is played. ULF should be under 25-20hz.I would say that a driver playing 25-30 hz should...
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So here is the promissed picture of yet unfinished rack:It's huge (the columns are 10x10cm) but still quite elegant-looking in my room. The electronics rack on the rightwill be put inside the TT rack when I finish working on it. It's all thick (4-5m...
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[quote user="steverino"] Romy said "When I had my magnetic and EMI probes running with open PP2000 cover then the probes showed me that I was in the middle of Chernobyl Black Forest. I think the PP3000 even more poisoning..."Now I begin to understan...
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