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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Years ago, when I visited the Cogent guys, Rich was working on one of their big drivers. The diaphragm was big and even thick and heavy, as compression driver diaphragms go. Of course they used 300B amps, and the bottom end had the "sewer pipe" type ...
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Two "temporary" solutions worth considering:1) A big nasty Krell KAV 500i (stereo 2x250 into 8 Ohms; 2x500w into 4 Ohms; built-in preamp; excellent volume potentiometer; remote; holds resale value). Though the mid range and HF of Krell amps is not co...
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From that location the only frequencies that would be useable would be 80hz down, basicly a subwoofer. You Don't even have 10 feet from the face of the wall to work with. I still say you will not be able to use above 80hz from this location behind yo...
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I ran quite a few types of gear with the 2000 I tested. It was quiet as a mouse with all of them. I also have extremely good high frequency hearing and if there's anything "unnatural" going on in that range it would bother me greatly. The buzzing...
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Well the thing is that the returning wave from the back side of the driver, does return in phase, but "later" than the front wave, logically. This should add some distortion that I have not noticed, but of course and worried for as much as I am worr...
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Regarding combined driver diaphragm area for ULF: Romy wrote: "...I disagree that using a bunch of 10" drivers is some kind of compromised in way. The six 10” drivers give me a surface of 2.3 18” drivers..." I recognize the relative and impo...
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"Like live" is a statement I really like to stay away from but seeing that someone else also misunderstood me there makes me feel I did a bad job describing my views on that. Last statement in that direction: live music and recorded music are two com...
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Paul, there is no dsp. Mine is just a hypex subwoofer ds series plate amp having the hypex ucd180 module inside. There were bigger and more powerful ones having the ucd400 or the ucd800. I think they may have stopped manufacturing this line actually....
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Paul S:My room setup is way too large. Vaulted ceilings, and this huge L where my listening area is in the top half of the L's spine (|) and the (_) is dining area and a corridor. It gets worse, there is also open space to the kitchen etc. etc. So it...
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Here are some real world measurements made at the 2007 NYC sub shoot out. The distortion numbers and characteristics should help us understand the difference between tapped horn distortion and conventional front loaded horn distortion.
The fir...
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Take a look at the below Dumax Report on the Dayton Titanic Mk III subwoofer.
http://www.parts-express.com/pdf/295-404dumax.pdf
Of course this is not the woofer I used, but the asymmetry seen in this report i...
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i am a fan of this.
who said that music is supposed to be ONLY about sound ?
until recording was invented musical performance was never ONLY about sound. because there was also something to SEE for example.
although i can still hear 25 hz i...
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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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After years of using the Expressive Technologies SU-1 and SU-2 step up transformers I come across to a fact this morning that the Expressive was reviewed by Robert Harley in June, 1992. I read the Expressive’s preamp review but I never seen this one....
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It is a shame that I keep finding threads about a 300Hz compression driver channel, that ends abruptly. I have been trying with a not-so-exact Goto S-150 replica (~1.7m deep, 75cm diameter mouth), and I know of another fellow in Sweden who tried the ...
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[quote user="AOK_Farmer"] I am ready for a subwoofer sized battery pack by the house electrical service feeding the audio dedicated lines. Whats wrong with this solution? It doesn't exist yet? Heck, $15k in the grand scheme of things...[/quote] Steve...
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Here is where I stay with my enigmatic Remedios project. I build inside of top box at resonator that I tuned 50-60 hertz. So basically it is under two square foot enclosure with a port tune at the bottom of resonance frequency. The port is shooting ...
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This is left channel. Right channel is mirror image.I am using 6db active crossovers all around.The subs are pair of 18" Aurasound 1808 per side. The current midbass is the white color horn you see. It is Funktion One DS15. The issue with this one i...
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The rule of thumb is that you can't localise sounds below 80hz. The classic experiment is to use a sub with an adjustable xo point and adjust it untill you can't tell where it's comming from. That doesn't change the fact that seperating the bass into...
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Thanks, Guy. JC Morrison? I am not familiar with this character well. All that I know about him the he pop up usually around Joe Roberts and they perfume act of public saliva liking. It does not say anything about his amps, however, neither about his...
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The weak bass of low-power SET amps is well known. I don't think anyone would disagree.Some reasons:Simple low power, especially with 93db speakers (try with 106db like Yorkville LS1208 horn subwoofer it might be different).SE output transformers hav...
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Thanks Romy!I went with two tiers as I do not have much space between the speakers and the side walls as I have a 2.5M cabinet on the front wall.I named my amp Koshka as I always felt Koshka made a contribution to the development of the Melquiades an...
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Romy, the drivers would NOT be facing down in a properly built infinite baffle. Google: infinite baffle subwoofer & then go to IMAGES to get a fast idea of installations. It is all extremely NOT complicated. The joists would not have to be cut...
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romy
i am not at all intentioned to make a horn speaker to get rich. i dont think abought this at all. for me its hobby. its abought to have fun, and to get as close as possible reproduction of live music. as close...
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Last time we wrote you thought I should focus less on tweeters and more on midbass.I am not done yet, but I have found a very nice midbass solution. Somewhat unorthodox, maybe.I have come to love police sirens! Without having A/B compared it to a pai...
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[quote user="mats"]Good start Dan!The JBL phenolic 2" driver is 2482.I would lower the crossover point as far as you dare, 300Hz or so.Now the 2226 will do what they are pretty good at.Later you will likely want to filter the 2445 around 2k.A 600Hz h...
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"Sadurni Acoustics' Staccato 4-way hornspeaker exploits MDF horns with up to 3" wall thickness. The 92cm lower midrange horn which loads a cone driver can "achieve 100Hz in-room". The actual 'turbine-horn' midrange driver is a compression sort. "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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Romy, thank you for your thoughts. First off, my further thought on the system and specifically the implementation of the high freq section: Yes, the time alignment would be a challenge but possible. This is the main compromise, in my view but the le...
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A “casual” look at full range usually results in 3 or 4 way playback for standard dynamic drivers or horns. There are a handful of “full range” commercial efforts from Edgar, Wilson, JBL, etc that are doing similar things with the range of each chann...
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