| Search | Login/Register
   Home » Horn-Loaded Speakers» 45Hz Bass Horn (24 posts, 2 pages)
  Print Thread | 1st Post |  
Page 2 of 2 (24 items) Select Pages:  « 1 2
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  Problems with horns: upper bass ..  Must it be about loading?...  Horn-Loaded Speakers Forum     109  926591  03-25-2005
  »  New  Chinese upperbass horn...  Some sensibility about bass reproduction...  Horn-Loaded Speakers Forum     35  285620  08-08-2005
  »  New  The “Primary Frequencies”...  Melody range and the other octaves...  Audio For Dummies ™  Forum     5  55237  09-08-2005
  »  New  LF for use with Vitavox S2..  Being more specific...  Audio Discussions  Forum     4  39535  09-10-2006
  »  New  Vitavox ak151 in klipschorn..  Please spare me from those questions....  Horn-Loaded Speakers Forum     1  19227  09-20-2006
  »  New  Practical Guide for Back Chambers Tuning...  Back chamber’s cost-benefit....  Horn-Loaded Speakers Forum     5  55876  10-21-2006
  »  New  Phase plug for midbass..  Ulf plug...  Horn-Loaded Speakers Forum     23  260539  11-08-2006
  »  New  About speakers Imbedded Macro-Positioning...  Big room AEZ...  Playback Listening  Forum     15  141752  05-16-2007
  »  New  Macondo's Axioms: Horn-loaded acoustic systems..  No wonder...  Horn-Loaded Speakers Forum     72  439777  07-29-2007
  »  New  Jessie Dazzle Project..  Will this better to be auditable?...  Horn-Loaded Speakers Forum     172  1238261  08-03-2007
  »  New  The Macondo’s Upper Bass Channel: what is next?..  Görlich again...  Horn-Loaded Speakers Forum     30  214886  10-28-2007
  »  New  Eventually - a reasonable midbass horn from GOTO..  Clever DIY going on where?...  Horn-Loaded Speakers Forum     97  969569  11-19-2007
  »  New  About bass horns by Johan Dreyer..  There are lowest bass horns and there are not lowest b...  Horn-Loaded Speakers Forum     5  72144  02-11-2008
  »  New  Denouncing of idea of Bass Horns...  Denouncing of idea of Bass Horns....  Horn-Loaded Speakers Forum     0  20590  04-15-2008
  »  New  60hz, GPA-515-8ghp horn.....  60hz horn...  Horn-Loaded Speakers Forum     32  238457  07-01-2008
  »  New  Midbass Horns and Real Estate...  Just a youtube video......  Horn-Loaded Speakers Forum     247  1634442  07-26-2009
  »  New  Experience Music Horn Installation @ VSAC..  RCA MI-1428B vs Vitavox S2...  Horn-Loaded Speakers Forum     25  206330  05-27-2008
  »  New  How to select mid/upper bass horn drivers...  How to select mid/upper bass horn drivers....  Horn-Loaded Speakers Forum     0  19613  08-25-2009
  »  New  My Multi-way Horns..  Faital chamber/ratio...  Horn-Loaded Speakers Forum     8  100694  11-29-2009
  »  New  An idea of “Rain Wake-Up Horn”?..  Looking Deeper into Rain Wake Up Horn...  Horn-Loaded Speakers Forum     3  23617  05-08-2010
  »  New  Macondo’s Midbass Project – the grown up time...  Vitavox 15/40...  Horn-Loaded Speakers Forum     455  2187846  05-20-2010
11-19-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,644
Joined on 05-28-2004

Post #: 21
Post ID: 8899
Reply to: 8897
A dynamically body-compressed midbass horn?
fiogf49gjkf0d

 jessie.dazzle wrote:

Wow, 6 x 15" drivers (!!!); though the curved profile certainly imparts rigidity, I'm guessing this horn must resonate more than a bit (no bracing until the mouth) -- but I like this thing.

Interesting, the phase plug-like device in the center.

If ever traveling near these people I will definitely try to arrange a demo.

About the idea of harnessing and trying to "tune" resonances... It reminds me of the "argument" that a flexible automotive chassis has merits (yes, perfect if you wish to "confuse" the suspension and fatigue the occupants! Never mind, I'm starting to sweat). I know, horns are not cars; apples and oranges etc.

In any case, my instincts tell me that energy would be more properly channeled by allowing the excited medium in the horn (the air) to "work off of" a solid foundation (Ever stand on the top rung of a ladder and try to hammer in a 10-penny nail?). Also, I don't like the idea of a driver working in the presence of a secondary source of excitement, regardless of its phase; in this case, air in the horn re-excited by resonating walls, causing pressure to feed back to the driver (An exaggeraton : The pulsating pressure one feels when speaking into the rear of a fan) But this all just theory.

Though I may be wrong, this is why I went the other rout and used a material that is really dead and heavy with loads of bracing.

I did not know that they use 6 x 15" drivers. This is what the big mouth comes from. To use many drivers is obviously not a chose. Looking at the midbass horn of other I constantly try to nails down what I would do if I go there. This horn is a nice illustration on my view. What I change? Obviously a single driver with 7’-8” throat. Use 7 sections instead of 6 sections. His would get rid of semi-parallel surface in horn, allows the horn to have much better coupling to side walls and eliminate an sharp angle on another horn’s side that in the case of 6 section would vignette the MF channels.

It is unquestionably that to use of dead and heavy material with lots of bracing is the way to do if there is an opportunity to do so. I question is there is another opportunity. Let pretend that we have heavily built 50Hz from 7” to 9’ form made from “dead and heavy material”. We are talking about a more or less permanent setting with each horn be let say 300kg-400kg or perhaps even less. Now let pretend an alternative version. We have the back chamber and the first 2-3 linear feet made “heavy” (let call it “base”) and then we have detachable, relatively light 7 leaves attach to the base. The 7 leaves might be made from wood of 3/4-1”” or architectural plasmas, or whatever… The leaves have little and accurate handled that extended inside of the horn and the through those handled we have tightening cables going. It might be one cable/cord/rod or isolated cables, I have no idea but the concept is that tightening the cable we have a change to dynamically compress the horn’s leaves.

Pretend we made the horn, installed it where it shell sit, let pretend that it is 50 to 180Hz horn. Then we take a sweep generator and begin to sweep the home, looking for the resonances. In this case we can objectively pick the resonances with stethoscope but we can also to evaluate how those resonances impact the auditable sound from the horn. Theoretically by tightening the cables/cords/rods it might be possible to manage resonances and to move them around, shaping up how the horn might response to sound. BTW, I have no idea if the concept would work but I do not see why it would not. After all the musical instruments are very light and the keys in them is not mass but well-managed propagation of resonances.  It however very much might not work for reproduction purpose.

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
11-19-2008 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,644
Joined on 05-28-2004

Post #: 22
Post ID: 8900
Reply to: 8898
Well, we can look even farther.
fiogf49gjkf0d

 jessie.dazzle wrote:
… This brings to mind the time I tried walking during a fairly serious earthquake, or trying to write a letter while riding in a car...

Actually it is very good association. In Zaratustra amplifier bias was made by the very same concept. It was the Newton's Laws of Motion in action. The similar idea might work in tuning bass horn. We can look even beyond that.

Back in my youth I was studying design of railway locomotives and I remember that they had one devised that highly attracted me – the antivibrator. Let live aside how and why it was used on locomotives and let to apply the same ides to our lightly-made midbass horn. Keep it not as the real pros but rather as brim-attack.

We have 7 light segments of the horn and they resonate, individually and together. In the end of each segment we hard-bolt the Aurasound’s Bass Shakers:

http://www.aurasound.com/public/bassshaker/frameset2.html

Each Bass Shaker sits begin some EQ, volume control and phase switch. Now we can do with the resonance of out horn whatever we wish… make horn form very cheap and light material… Theoretically, if it works then it open a new whole outlook at the “pain” of midbass horns. BTW, this idea I was playing with while I was thinking about my “Resonant Oops” concept…

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
11-19-2008 Post does not mapped to Knowledge Tree
Paul S
San Diego, California, USA
Posts 2,213
Joined on 10-12-2006

Post #: 23
Post ID: 8901
Reply to: 8898
The Point of No Return (a candle in the wind)
fiogf49gjkf0d

Jessie, I agree in spades.  You could play around trying to "tune" that thing for the rest of your life.

But then, who is going to hear serious problems with something that was such a pain and expense to build and install?

More likely is that anyone who got that far would either hear it as "successful" or they would, indeed, continue futzing with the thing into dotage.

OTOH, better to wind up with this a dud than to have one end of the house cast in bad-sounding concrete...

I'm going to light a candle, right now, for all the giant horn builders out there...

Best  regards,
Paul S

06-13-2010 Post does not mapped to Knowledge Tree
Paul S
San Diego, California, USA
Posts 2,213
Joined on 10-12-2006

Post #: 24
Post ID: 13751
Reply to: 8901
Can We Ever be Saved From Ourselves?
fiogf49gjkf0d

Mining the site, as I often do, I turned up a link to this thread.

Anyone thinking of horn LF right now, please take a look at post #7, this thread. This is, according to my experience, the quintessential "home brew" "LF" horn. Need I say more?

People, this is no "gimmie"...

Paul S

Page 2 of 2 (24 items) Select Pages:  « 1 2
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  Problems with horns: upper bass ..  Must it be about loading?...  Horn-Loaded Speakers Forum     109  926591  03-25-2005
  »  New  Chinese upperbass horn...  Some sensibility about bass reproduction...  Horn-Loaded Speakers Forum     35  285620  08-08-2005
  »  New  The “Primary Frequencies”...  Melody range and the other octaves...  Audio For Dummies ™  Forum     5  55237  09-08-2005
  »  New  LF for use with Vitavox S2..  Being more specific...  Audio Discussions  Forum     4  39535  09-10-2006
  »  New  Vitavox ak151 in klipschorn..  Please spare me from those questions....  Horn-Loaded Speakers Forum     1  19227  09-20-2006
  »  New  Practical Guide for Back Chambers Tuning...  Back chamber’s cost-benefit....  Horn-Loaded Speakers Forum     5  55876  10-21-2006
  »  New  Phase plug for midbass..  Ulf plug...  Horn-Loaded Speakers Forum     23  260539  11-08-2006
  »  New  About speakers Imbedded Macro-Positioning...  Big room AEZ...  Playback Listening  Forum     15  141752  05-16-2007
  »  New  Macondo's Axioms: Horn-loaded acoustic systems..  No wonder...  Horn-Loaded Speakers Forum     72  439777  07-29-2007
  »  New  Jessie Dazzle Project..  Will this better to be auditable?...  Horn-Loaded Speakers Forum     172  1238261  08-03-2007
  »  New  The Macondo’s Upper Bass Channel: what is next?..  Görlich again...  Horn-Loaded Speakers Forum     30  214886  10-28-2007
  »  New  Eventually - a reasonable midbass horn from GOTO..  Clever DIY going on where?...  Horn-Loaded Speakers Forum     97  969569  11-19-2007
  »  New  About bass horns by Johan Dreyer..  There are lowest bass horns and there are not lowest b...  Horn-Loaded Speakers Forum     5  72144  02-11-2008
  »  New  Denouncing of idea of Bass Horns...  Denouncing of idea of Bass Horns....  Horn-Loaded Speakers Forum     0  20590  04-15-2008
  »  New  60hz, GPA-515-8ghp horn.....  60hz horn...  Horn-Loaded Speakers Forum     32  238457  07-01-2008
  »  New  Midbass Horns and Real Estate...  Just a youtube video......  Horn-Loaded Speakers Forum     247  1634442  07-26-2009
  »  New  Experience Music Horn Installation @ VSAC..  RCA MI-1428B vs Vitavox S2...  Horn-Loaded Speakers Forum     25  206330  05-27-2008
  »  New  How to select mid/upper bass horn drivers...  How to select mid/upper bass horn drivers....  Horn-Loaded Speakers Forum     0  19613  08-25-2009
  »  New  My Multi-way Horns..  Faital chamber/ratio...  Horn-Loaded Speakers Forum     8  100694  11-29-2009
  »  New  An idea of “Rain Wake-Up Horn”?..  Looking Deeper into Rain Wake Up Horn...  Horn-Loaded Speakers Forum     3  23617  05-08-2010
  »  New  Macondo’s Midbass Project – the grown up time...  Vitavox 15/40...  Horn-Loaded Speakers Forum     455  2187846  05-20-2010
Home Page  |  Last 24Hours  | Search  |  SiteMap  | Questions or Problems | Copyright Note
The content of all messages within the Forums Copyright © by authors of the posts