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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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[quote user="Merlin"] Absolutely inadequate for desiphering the subjective sound quality yes - all we can deduce is that the system has a maximum sensitivity of 98db/w at best, and quite possibly less. As do many fine loudspeaker systems.
All louds...
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[quote user="rowuk"]Hi Amir,your english is just fine.I think that there is an additional factor that your formula needs. Sense of pitch is not determined acoustically by "Q" unless we are talking about pure sine waves. When we add the overtones foun...
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Understanding Line Array SystemsBy John Murray
Behind the buzz, there are a lot of factors at work in line arrays. An explanation and comparison of current models. This discussion can’t be contained in just a few paragraphs, so we must start with th...
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A six year ago or so when I played with different compression drivers I bought a pair of Dukane 5A540 and at that time I was not able to find any information about them. Nowadays I was pointed out that an eBay sealer “ bayleafs” actions a pair of Duk...
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[quote user="Paul S"]Dirty ground effects have remained a problem for me even with a special ground dedicated to my system, and I believe this is caused by varying ground potential and also inter-component "cross-talk" via the AC lines. ...
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The “Enjoy His Music” published the old celebrated by many DIYers Herb Reichert’s article about his 300B amp ideas.
http://www.enjoythemusic.com/diy/0709/flesh_blood.htm
I read it before but reading it now, after a few years again...
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Nice posts Romy and Jan, agree almost 100%. I've heard the Behringer in an originally crummy system and it butchered things completely. The input levels were low, which as you point out, won't have helped at all.On a vaguely related note: I dunno if ...
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[quote user="Marc HENRY"]hi all,thanks for your interest !yes the frame is curved, HF and MF are //yes there is a phase plug in the bass horn. This cover 80-300Hz.there is a separate infra-bass section, covering 20-80Hz.images of the bass phase p...
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The coherent wave phase plug gives time alignment across the full width of the Be diaphram,, No other phram can do this.....
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I believe you use the laser to find out at what frequencies there are resonances and where they are at so youcan make the phase plug accordingly but like I said I know about as much as those lasers as I saw in the Tad brochure. A machinist told me on...
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After thinking about this for a while, I have had a thought that should be relatively easy for anyone motivated to explore and I would be interested to see what others on this forum observe from such experiments.Fundamentally I think the injection ch...
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Romy
I had a SG370 mid apart only yesterday.I should have taken a photograph.I have also seen the inside of the tweeter.They are very similar,so I have no reason to suppose the low mid SG 505 will be much different.I'll try to explain.I think they a...
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[quote user="Vasyachkin"]the only real questionable aspect here is adding a second set of back firing, inverted phase horns. mathematically speaking it is what the design "needs" but of course the real question is - what does it sound like ? that's...
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It was honestly like "oh a big horn, gotta listen .... nice, who did that, hello, how did you..." .... "lets go outside for a talk". I actually thought to the last moment that they were japenese. Coz majority of eastish industry is, and me as western...
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Hi PaulWhy don't you take any tweeter u like, hook up a second in reverse phase on its back?Cheers Josh ...
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You said it sounded like a phase problem and it was. Couldn't have been easier to fix either. ...
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[quote user="haralanov"] My comment may look too simplistic, but it is not. The frequency response is not self contained entity, because it shows the energy balance of the Sound. So you can have flat energy balance of good Sound and you can have ...
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Here is an active (I think), "analog" (they specify) product that is said by its promoters to develop something good by way of "phase" information that otherwise remains buried in recordings. While the "specifications" and marketing are vague (to sa...
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Likely, whatever you do with subs will include a big coil, and caps and resistors, too, if to make a steep filter to "match" the Dannoy LF "roll off". The sub(s) might be tailored in terms of correct SPL to blend with the Dannoy at the X/O point, and...
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Edgar, very very nice observations re the phase! Can you somehow share the movie? Shouldn't there be a second phase jump around Fs of the passive radiator?
Have you tried combining sealed subs running parallel with Dannoys? I.e. ...
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Amir, I have a couple of options for swapping phase, at different points in my system. On 2 occasions when Clark visited me at my place, I could switch phase and he could hear it, every time. I was pretty impressed by this, though he insisted that it...
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[quote user="Romy the Cat"]
Drdna, generally I would not agree that your assessment of the EdgarHorns is correct. There is nothing fundamentally wrong in them that would prevent them to "disappear" in the room. [/quote]Well, this is good news.&nbs...
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I couldn't figure out where to put this but this thread came to mind. ( a post which i loved by the way)tube phase plug from Decware. http://www.decware.com/newsite/images/dfr6%20006.jpg I actually used to appreciate this guy.. partly because he didn...
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... this is the mid-low horn showed mounted on the bike... missing from this pix - because time-aligned and well in phase, but out of sight - were other bikes like this driven by the sons and daughter of Goto the Elder... mid-high and high bike/drive...
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ZZ, clearly, no single driver or pair of drivers can reproduce the range and power of an orchestra, and each of us deals with this according to our own personal demands and resources. The concern of this thread is trying to juggle/work with "phase" ...
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Hi Romy,
Again, good words (don't want to kiss your ass ;) ). Though, I get your point and agree, one should not think that this winter picture means Goto sound cold (u never know what one could read out of it) .
What Klaus also highlighted, is...
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Of course we are just picking our poison when we settle on any sort of speaker, since any speaker is a compilation (pile) of compromises. And it's not like we can contain and control "phase issues", either by measuring the distance to our voice coils...
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Of course, any speaker is a compromise rather than a "solution" for the complex problems of "phase", which can hardly be "solved" by fixing driver diaphragms in the same verticle plane, at least relative to the listener. Not to say that this is not w...
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[quote user="eduardo"]
YL 75000 has heavy phase plug indeed , rca style (see sketch) while 1250 ( I never had one) gets a fixed metal dome equivalent to spherical piece on 75000 and rca plugs without conical shape pointing the exit of throat. Ir...
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When the passive radiator in question is mentioned, are we sill talking about a particular active 10" Scanspeak driver that is not hooked up to an amp? Again, the PR is always parasitic, more or less fighting with the active driver, except, apparentl...
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