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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="MINGSU"] Time-aligned is an impossible task from my point of view. How can one perfectly time align different drivers? Align to what precision? mm, inch, cm or ft? 5%, 10%, 30% time align? Align to the tip of the cone or middle of the...
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Facing similar issues, until confirmed or disproved by experimentation, the following represents my view:Situation 1):Mid-bass horns aimed generally TOWARD listener's ears: Alignment of the DIRECT OUTPUT of the horn for time arrival to listening poin...
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[quote user="NBC"]Hi Romy,1) What dimensions for 1808 baffle would you suggest? The Golden rule is: 1.6 height, 1.0 width, 0.6 depth. 2) Is floor-firing vs. front-facing cone useful or preferred?I wouldn't use the 1808 or 8196 in ...
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Interesting.
When I moved my system and was just learning the new room and making changes, I was also listening to more Bach than usual. I mostly wanted to play Partitas, Inventions, Preludes, and Goldberg Variations. I was turned off by any cell...
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Koh,if time alignment is critical (in my world it is), the sources of the sound (the driver diaphragms) need to be aligned. A very long exponential horn and a short tractrix are not „impossible“ to align, but what reflective surfaces ftom the exp. ho...
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[quote user="Markus"]I can't really make it out on the photo, but it looks a bit like a Tannoy Supertweeter.[/quote] Yes, it is but my interest is not what kind of brand he used but why he would need an additional tweeter in the first place? The mult...
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My first choice would be a Sony SACD recorder with storage in SACD format. Quite expensive, but I would not use an expensive Sony playback device. Their early models (still available new on ebay) were designed to show how much better than regular CD ...
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I must be missing something - or not be ready for this yet. Here are my understanding problems:1) he starts with the "left" speaker and searches for the best bass. I would think that one should search individually with the left and right and pick the...
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[quote user="Bill"] I have set up a 16 channel system with 7 floor Edgar horns, six inexpensive height, and one overhead speaker (all under $150 each) and one subwoofer channel, all controlled by a Trinnov Altitude 16 pre-pro, which is a computer...
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Have been playing with the Dannoy’s for four weeks now and they have significantly improved. Using my Trinnov pre-pro to see and adjust the parameters, i can answer Rom'y points.1. Frequency response: combined with a JL f113 subwoofer crossed over at...
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Well, Romy has often said it, digital can delay but not filter and analog can filter but not delay (in respect to sound quality). I most certainly agree.So the speaker is not time aligned and they try to clean up the mess digitally. Perhaps with a mo...
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[quote user="kodomo"]I don't think you can align the tapped horn. My tapped horn has a total length around 5 metres. To time align that with my other drivers, its got to be around 5 metres closer than others. The only other solution is delaying the r...
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I find this project so fascinating. I find it particularly interesting because one of my first experiences of good sound involved a field coil driver. Many years ago my grandfather bought an old hammond chord organ(predates the b3 and other...
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[quote user="jessie.dazzle"]It is interesting to note that the evaluation tool shows lines radiating perpendicular to the curve at any given point, just as the sound wave is supposed to be oriented as it progresses along the horns length. [/quot...
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Hello Gera,First thing I would do is get rid of the active Xover, in my experience they mud everything up. preamps are very important and this is like a double preamp with a lot of gain stages. For bass you can maybe use it. I use a separate Xover...
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Actually it is very interesting question and I almost feel you pain for decision you will be making. I do not think that anyone would be able to express any arbitral opinion about the subject, as least an opinion that worth to follow. You see, buildi...
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[quote user="speedysteve"]The systems I've heard with steep slopes (only 4th or 8th order) sound hard and unnatural to me.[/quote] Yes, the higher order crossovers do sound harder even if all time alignment measures are taken. Still, do not forget th...
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[quote user="rowuk"] Need of Time alignment, in my opinion is an "acquired" taste like
with cigars, good wine or cognac. It is the product of an investment in time,
purpose and result. [/quote]
Hm, not necessarily, it has nothing to do with acquir...
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[quote user="Dominic"]Here's a threeway with the BMS coax like in your orpheans nested in what i think is a 80hz horn which is driven by 2x15"sI'm not sure how well the time alignment works. I think the woofers are a bit too far back.in any case: [/q...
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I think to call what Bill made as surround sound is make huge the service not only to the concept but to ourselfs. I wrote quite extended review of my thoughts on the subject and I was about to publish it but it is not in the computer that I have ac...
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Hi Murat,Personally, I would re-think the tapped horns being physically incorporated with the rest of the system. To start, from what I understand (I don't use a tapped horn) because they use both the front and the rear of the driver for sound, they...
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Hi Romy Im just trying to imagine that. If you got to keep the vertical offset small, between the ways, this would rip a hole in the middle, wouldnt it ? Also bit surprising as i thought you liked the injector on the ground initially. I hope I unde...
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I've been thinking; rather than placing the mid-bass horns off to the sides or above the rest of the horns as in the first two images below (a CAD model of the horns in my new place); a plan which implies accepting imperfect time alignment...Ori...
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[quote user="jessie.dazzle"]Even if you don't agree with the design, there's some clever DIY going on here.[/quote] Sorry, I did not now see any “clever DIY going on” in there. For sure he is a skilful, perhaps wonderful machinist and perhaps good ca...
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Unluckily I have no experience with IB, would love to. Any way If you want it hidden and time aligned, the best bet is the uderground!Now having all that space there it would be a pity not to go IB.The IB idea can be much more elegant than the pic...
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Time coherence of ULF may be less important than that of higher frequencies and that seems to make sense in theory and jibes with my own experience. However, I still think ULF timing matters a lot with respect to a) higher frequency drivers and b) ot...
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I think we are all agreed that if time alignment and space were not issues, a bass horn would be the way to go.Now, I'm fairly convinced that the overwhelming benefit of horns in this range is the phase response, ie flat group delay vs frequency. Mos...
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One thing to bear in mind with the bass horn delay - I thank Tom Danley for explaining all this a while ago - if I understand it right, a small direct radiator (ie small in relation to the wavelength - which will obviously be the case with ...
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Actually you put it absolutely beautifully; I should map your post to the Knowledge Tree. I would put in your formulation one more ingredient: the reverberation time in the room. The larger room and longer decay at the given frequencies the less anno...
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hi Romymy name is Angelo. I am swiss/italian, live in brazil the last 10 years . I grew up assisting my father buiding speakers and comercialize them in small numbers. I where listening for many years on Klipschorn replica with altec 416-8b...
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