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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Awhile back I had a conversation via email with Tom Danley concerning the Phoenix Gold Cyclone that he developed for Phoenix Gold and the car audio market. They were not well built by Phoenix Gold with some crucial parts made of plastic (although...
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Hello, Ulf, and Happy New Year. Slightly OT, I realize, but have you tried at all to optimize the L Cao driver as a direct radiator, and disregarding LF? Do you have any impressions of this driver above 300 - 400 Hz and below 4.5 - 6k Hz, with respec...
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That attic is a lot of space to perhaps return to a midbass horn, should you be so inclined.Is the IB ULF run from DSET or a separate amplifier?...
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I would try reducing the level of lowest channel or only play left or right side (if stereo ULF). Then run your experiment again.
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Bill, I am happy that you've improved your bass. As Romy mentioned in an earlier post about Bruckner, RTA is just one tool, and we have to listen and hear results with Music we know and love. When you told of the disappearing S2s, I was going to ment...
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Here is an image depicting the radiation pattern of the HF for a midbass with and without phase plug. The dotted line represents the HF output. This is not a measured response!Here are a couple of pictures that may be amuzing. My girlfriend and the s...
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[quote user="jessie.dazzle"] Below a certain frequency the advantages become a handicap. At that point (if you were using its EQ capabilities), the SMS -1 would start to step in... Whether you reach that point with your 10" arrays depends on how low ...
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Sounds like the title to a poem!I'd go with the RCRC crossover... Why? Its cheaper, and as Paul mentions, until you introduce the final character (uncle ULF), the real end of the story is impossible to write.
jd*...
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Ok, I did try the 4th order filter and it did not sound as I wanted. The 3rd order is right slope foe my room but I need to go for custom filters separately dedicated for right and left channels. The problem is my right channel with the att...
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[quote user="Paul S"]
I guess it’s time to talk about these amps in terms of The
Loudspeakers. In truth, I thought of these amps from the first time I thought
about The Loudspeakers, to the point where I “built and tested” The
Loudspeakers with...
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“A large room, open to the
stairs, maybe a dozen watts to play with” that was exactly my concern from
beginning. Of cause I could employ a more powerful amps from bottom but it my
case it would be under 100Hz and it would be a big white flag. So, ...
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A friend of my after reading my comments about the EdgarHorn installation in Vegas (in here) asked me why do I think the bass in Bruce’s room behave as it behaved. I tried to think about it. Some of those thoughts intersect with some other projects t...
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A few months ago, in May of last year in the thread about Listening Rooms and Composers and How to play Bruckner Sound on Audio I have complained that my room is not what I was looking for as I was hoping to have Bruckner Room but I need up with...
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Thanks, Rakesh. It might be a good driver, I always like Scan Speaks.
A few things. The Scan Speak nowadays is not Scan Speak anymore, just a name and they made by someone else. Also, I would like different type of drivers. I would like 18-24 ...
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Hello, Ulf.
Interesting. The TAD1201H is 12-incher with resonant frequency of 50Hz. It has relatively low resonant frequency for 100Hz Tractrix midbass but you most like used 10” thought and consequentially shorter horn. The shorter horns beam...
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...the Driver Will AppearWith appologies to the Buddha, and notwithstanding the fact that all the "action" on hi-fi forums centers around what to buy and where to buy it, success with speakers more often than not stems from lessons learned from "mist...
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Here are two guys in Belgium that made up 833A 150W amp. That might be a good candidate for driving ULF channels.
http://monolithmagnetics.com/index.php?option=com_content&view=article&id=77&Itemid=81
Why I do not have...
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Paul, thanks! I'm quite happy to hear I'm not the only one fighting vibrations in a seemingly dead structures...It takes a lot of thinking to properly isolate and damp vibrations.Not unlike in the complementary problem: reproduction of the audio rang...
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[quote user="Romy the Cat"]I do not understand what does it mean. Are you saying
that you lost bottom response with closed exit hole on the driver back? If with
the closed drift from back you have a (loaded!) response no lower than 200Hz then it i...
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Petar, wonderful observation as usual. I would like to add one factor that is always there but practically impossible to consider predictably. Any driver has suspension (with exception of suspension-less drivers that are not suitable for bass) and th...
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One advantage of the use of a phase plug in a midbass horn is that it will beam less at higher frequenzies than a horn without phase plug. If the phase plug is designed for the specific horn and driver it will help "steer" the HF.
Me and a friend ...
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Dear Romy,
well the horns are actually not designed for HF. The intended working range is up to 5-700. But since we use low Q, only second order filters we want to have a rather large overlap in the crossover region and a fairly even pattern over ...
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I told somewhere at the site about my idea of Zarathustra.
The amp as good as it is but I want to make it super compact and with max efficiency.
The efficiency I was considering to get
by making the secondary of output stage switchable. I got fro...
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[quote user="unicon"]Since you added a new parameter in audio play back called : Decor I'm afraid, it may make it far too hard. [/quote]I agree but it I do not think that it would change my mind. Perhaps “décor” is not right word however; it is not...
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[quote user="Romy the Cat"]“...very tight. I know the audio writers love this
type of bass but I want vomit from it. [/quote]I had a laugh at this...yes...soft bass is definitely where "it" is at. I hear someone mention the word "tight" in relation...
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Dear Romy,OK, some more about the midbass.Well, it was not really a surprise to us that the horn without the phase plug was dissapointing. Without the plug we had a horn that was a bit too short, had too large front cavity and less compression than w...
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There is a fusion in contemporary turntables: to make platters and tonearm bases separated. I am not an expert but in my ignorant common sense I do not think I like it. For instants take a look at a German table:
http://www.montegiro.de/...
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It is so funny. As Kitty and I are looking for different
houses we look at different listening rooms and we have different ways to think
about room sizes. She think about space for her piano and size of oriental ran
she would drop on the floor. Wh...
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Devo, the GM-100 for sure is a good triode to get 160 watts
output power in A1. Still, it would be a good chose, from my point of view,
ONLY from a prospect of embracing as good DIY audio project. There is nothing wrong
then to do the good DIY aud...
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