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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="rowuk"]Brass instruments function much differently than audio horns. First of all they are built extremely resonant by mismatching length and horn taper. The taper of the bell is there not for horn type efficiency, rather to change the a...
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[quote user="Romy the Cat"]If I succeed to make my midbass horn at attic then I will face another problem that I do not know how to address at this point. The horns will be powered from Melquiades bass channels – it means it will use a good 70 feet s...
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[quote user="Romy the Cat"]I was very slightly open the back chamber of the driver that gave to me some ease at lower knee.[/quote]Congratulations you have found and use this principle, otherwise the back chamber acts like pneumatic brake for the low...
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I understand that "nothing changed in the horn dimensions if you go from between 10" and 12" driver". You are referring to the horn mouth I assume. Do you have a idea what compression ratio is good to have for upper base horn? It seems that 2:1 is ta...
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Thanks, Scott L. I get the math, and no doubt hearing is believing. Still, I do know for certain that "a driver" can be influenced by a defined amount of trapped air in an enclosure, at least as far as the sound that comes from the driver, and sound...
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Josh, I do not have a
definitive answer to this question with witch I feel comfortable. I need to say
that I had a multiple experiments in multiple audio fields and I always felt
that excessive or too limited magnetic force is not always complimen...
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[quote user="haralanov"] The horns, even the fast opening ones are physically too deep for their mouth’s size, and this leads to a psychoacoustic illusion that the sound images are arrested at the bottom of the horn and from there they scream they wa...
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[quote user="yoshi"]What was wrong was that I do not have a proper evaluation method/ability of Sound and piled up my system around the Reps driver with an intention to overcome the obvious shortcomings under the way I've been listening to jazz....
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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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Hello again Romy and cats... sorry so slow in replying to this thread... the recent posts generated an automatic email reminder... :^)so a few things... one, there is a pair of Goto 370 on eBay and pictures of insides... the newer ones are made the s...
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Adrian,
This it truly complicated question. The Titans’ upperbass (the better one, curved, with 12” driver) is not realty HF capable and it makes a MF driver need to go all the way down to probably 500Hz (I do not know what Bruce dies in the crossov...
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Romy
Your rules say no direct answers so forgive me this one.
My horn is a true 21Hz horn.If you want to do the calcs:(More or less) Throat 6264 square cm.Mouth 48312 cmsq.M or Q 0.7 depth 3m.Quarter space loading.It does not quite make 21Hz.-3...
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[quote user="Ronnie"]"Still, even if I knew that you use very poor amps I would hardly anticipate that it should be as bad as you descried"-I could imagine one of them being faulty to this degree but not all three, and not at ALL sound levels!Those&n...
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[quote user="cv"] I couldn't unscrew the top threaded piece myself. Perhaps I was turning it the wrong way?! Any guidance you could give on dismantling the driver would be appreciated.[/quote]Chris,
To take the outer ring is very simple. Uncre...
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slowmotion,I think the ultimate length of the upperbass horn is 3”- 4” throat. With longer horn it would be very complicated to time-align it as the horn will mask out the MF driver. The ultimate driver for upperbass should be a compression dri...
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Romy, I am not clear from re-reading how low you plan to go with a 4" to 5 " dynamic driver, like you mentioned a few posts back. I thought I read that you planned to go as low as 70 Hz with this channel, which confused me when ...
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This is probably the reason I can listen to EV Patrician IV in relatively small space and close to the speaker without much of fatigue. The other factor must be that it's 4- way design with narrow band-pass for each horn. EV T25 2" phenolic com...
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Thanks Romy, I'm using a TAD 10" mid in a sealed box to produce 200hz-800hz. Although I'm fairly happy with it, I'm hoping a compression driver/horn would give even better results. There aren't a lot of ready made options for 200-800hz so I chose Got...
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Low power set should not be a problem. The Unity was fine with SET amplifiers, so the Synergy should be no different, if not better. The Synergy horn is different than the original Unity horn. There are some very specific improvements in the Synergy ...
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Hello Marc Henry,I am curious as to why you picked the 4540 driver for HF. I have no experience with this unit but it is interesting since the design claims to be of the "ring-radiator" type. This topology was invented by Steen Duelund for use in reg...
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Audio Federation have publish some images from the Silbatone room at CES, even it is in their new idiotic format of the “magazine” but they still visible.
http://spintricity.com/445/public/Vol1-3/page182
What attracted me in the images is to see wh...
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[QUOTE]Tone in language is entirely different from tone in language.[/QUOTE]OOPS... should read "Tone in language is entirely different from tone in music."Where's the edit button on this thing?....-----------------------------On single drivers and p...
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Here is my proposal for an ideal horn system. The concept derives from the really of the horns as I know them, the available park of the drivers, the drivers’ real capacity and from… everything else that I might comment upon if you would not figure o...
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[quote user="Romy the Cat"]One of the emails that I receive is very interesting. The author warns: “...when experimenting with throaths I found that if the compression is big, near 2 or higher you get some big, smooth, unfocused aqualung sound. You...
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What was wrong was that I do not have a proper evaluation method/ability of Sound and piled up my system around the Reps driver with an intention to overcome the obvious shortcomings under the way I've been listening to jazz. The result wa...
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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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Romy Hi, Raplh uses a 300b push pull, but the power supplies are massive, parts alone 15K Euros, each channel has a separate supply, the pre-amp again two massive power supplies , he prefers to use eight of the horn loaded bass bins, although I...
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Based on my own long-gone experience it appears that every horn is "loaded" to sound just like a horn, in terms of length and flair versus frequency demands, not to mention phasing/cancellation problems that I would like to see/hear corrected digital...
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Robin, I don't know why, but for no reason at all I was thinking the 1" polyester driver was a dome! Its being a compression driver likely means a 2" diaphragm, and it certainly opens the door for sub-2kHz performance. Actually, it's 8" drivers doing...
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Romy, if you have some spare diaphragm/VC assemblies for your S2 drivers, do the experiment I mentioned above (remove the outer layer of the VC) and we will talk about the inductance in terms of sound after you hear the results with your own ears... ...
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