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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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As a practical matter any room length shorter than 60 feet (20 Hz) is going to chop bass note waves - the smaller the room the higher the frequency with wave chopping. Also because of the size of the bass note waves, human ears have trouble locat...
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Marc Henry-In the 6moons write-up, you mentioned the Altec 515 re-issue not being satisfactory for your purposes on the Grande Castine horn. I presume the specific 515 variant you used was the 'g' type (designed for horn loading) rather than 515'b' ...
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Romy,
I have also noticed a difference in the response of my Altec 416A's with various amplifiers. My best rated amplifier the Bryston B60 was the worst and I could not listen to the speakers. I have been using a ch...
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First off, I forgot to mention an interesting observation: Before running the sweeps (previous post), since the drivers in the upper-bass horns are new, I decided to verify/optimize rear chamber volume (they are easily adjustable)... I wasn't expecti...
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Romy wrote:"...The material itself – what to use. I am wide open from any type of wood to synthetic panels (like cement panels). Perhaps it might be a combination of organic and synthetic layers..."I realize you won't be doing the work yourself, but ...
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Hello,not for PA that´s right,but up to 95-100 dB max.there are a lot of goodHiFi bass driver.normal listening level 55-65 dBthe trick is themembran movement interlacingand the bass horn mouth distancelook in the middle:http://www.hm-moreart.de/11.ht...
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About the bass, which must be lacking in such a construction:I once made an experiment with something similar (single "cut" horn with "mouth" directly adjacent to the driver), and subjectively there was much less bass extension when I placed a barrie...
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Paul, l I have written about it somewhere: the passive speaker-level crossovers on bass channels are no good. Marko has 250Hz that with 3rd order would be around 10mH and 2mH. With air core then would be very large coils with huge amount of DCR – ver...
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I know, I know, I know…
Any person who in one way or other practices horn-loading loudspeakers has a wet dream about bass horns. Here and there people built them. Here and there you can hear the assuring and overconfident statements like: “the...
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Romy's quotes in blue :"...Discussing the Jessie project we multiple times mention the idea of the large midbass horn hanging above MF section... The rational was to have it positionally contra-react the output of the upperbass horn... But do we au...
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Hello Romy,
I understand the difference between the kind of "basshorn" pictured here and the proper compression-horn that you use. It is true that many DIY-types like to make basshorns in their garage without much thought to technical consideratio...
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The throat diameter of 7" is what I first approximated as an acceptable size, with the 4" being an alternative (should some unwanted effects arise, I may then experiment with the 4" throat). I can't simply assume 7" will be correct (though that...
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jd wrote :
"...I may have come up with a way of making the BIG horns fairly painlessly..."
Yes well, I really must give up the absinthe !Lbjefferies7 wrote :"...Not "end-of-life"in the sense that it will be built and then I...
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These are some theoretical questions, I guess we can only build them and see, but some would be clear no no....
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[quote user="Romy the Cat"] 1) Horn loaded drivers are narrow-bandwidth transducing system. The wider range a horn channel covers the more it conflicts with restrictions of own topology.
2) All channels shell have strictly parallel axis
3) ...
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Just a quick note.I tired a JBL 3" compression driver 2490h model with original Titanium diaphragms on a 120 hz Tacrix horn. I got a response down to 200 hz. How did it sound? It sounded good clear and transparent but it lacked a little tone imho...
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I was pitching before that to make a loudspeaker with integrated LF module you have no ethical right to charge more then let say $20K retail. If you charge more then you have no mechanism to deliver anything for the money people pay. However, if you...
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[quote user="jeff1225"]Yes Rommy I agree with most of your comments above. What I found interesting in the larger installation was the time alignment and the bass implementation. I do disagree with your statement of not stopping by to see the Hornfab...
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[quote
user="Jorge"]We only
use the Beringher for bass under 100 hz, driven by the main amp. We tried a lot of different
solutions, including analog active xovers, the DCX is clearly better than the
Analog Xovers we tried. There
are very few com...
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Frankly if it was my product
then I would look in a different direction. I do not know what your bass
modules are and what kind amplification they need and sound they produce. I for
sure know that “top of the line class D” application is not the d...
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I have been quietly listening and working on my new system. The upperbass horn can be crossed lower than I anticipated, which is great news for me. I was going to have the crossover point of 160hz, but I can easily do 120hz :) The dual tad's will be ...
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Romy
the Cat wrote:
Well,
you need to define what does it mean “can't oper...
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Romy, thank you very much for very detailed explanation of your horn theory.Let me present some doubts about it. From physics basics when we have more than one springs (suspension, throat resistance, back chamber) we can consider it as one spring. Th...
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It's too long ago for me to remember the sound of your system, but not too long to remember my reaction to your playback. I remember the bass being different. The adjectives that come to mind are only words, but for the benefit of readers who may n...
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Gentlemen:I assure you, Infinite Baffle bass simply has no peer. Yes, you do need specialized drivers. The Infinite baffle bass concept is so old, it's rarely even considered anymore, plus, you are indeed married to the installation....
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I laid my hands on WinISD speaker modeling tool, which seems to be quite popular and widely used. It can model passive radiators too.
Here are the simulations of my idea of the Dannoy bass: Scan Speak active + Scan Speak passive in the same bo...
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Well, that is a small room, all right. Regardless, a "mid-bass deficiency" alone could literally evicerate big works. I have written up the Kubelik/BPO/Dvorak 9, because I think so highly of that performance. It should absoutely be loaded to the g...
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Hi Romy…and fellow audio nutters. I’ve bitten the bullet, and shifted from BLH to front-loaded. Yes, I was an idiot, a moron for not doing this sooner. My project is ‘humble’ by Romy’s standard…but I feel it meets the following objectives I h...
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Drawing of dual LF bass horn.Romy, here's a sketch of how I might be able to build the LF bass horns...per my post above.Regards....
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http://phys.org/news/2013-05-sheerwind-invelox-turbine-power.html
I tried to start this in a New Thread, but I did not know how members start a thread. Build a custom driver & throat adapter for this & shake a cit...
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