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   Home » Horn-Loaded Speakers» Macondo’s Midbass Project – the grown up time. (456 posts, 22 pages)
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   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  45Hz Bass Horn..  Can We Ever be Saved From Ourselves?...  Horn-Loaded Speakers Forum     23  239194  09-19-2006
  »  New  8" Goto Woofer for 60Hz Horn..  It's not a Goto 8in driver...  Horn-Loaded Speakers Forum     5  62277  11-03-2008
  »  New  The Macondo’s Upper Bass Channel: what is next?..  Görlich again...  Horn-Loaded Speakers Forum     30  199767  10-28-2007
  »  New  Jessie Dazzle Project..  Will this better to be auditable?...  Horn-Loaded Speakers Forum     172  1153861  08-03-2007
  »  New  Romy The Cat's new Listening Room..  Won't be the last time he makes that trip!...  Audio Discussions  Forum     478  1922160  03-28-2010
  »  New  Problems with horns: upper bass ..  Must it be about loading?...  Horn-Loaded Speakers Forum     109  870610  03-25-2005
  »  New  Midbass Horns and Real Estate...  Just a youtube video......  Horn-Loaded Speakers Forum     247  1530189  07-26-2009
  »  New  Macondo’s lowest channel...  Good highs...  Horn-Loaded Speakers Forum     148  973205  09-15-2010
  »  New  Practical Guide for Back Chambers Tuning...  Back chamber’s cost-benefit....  Horn-Loaded Speakers Forum     5  51872  10-21-2006
  »  New  Superbly interesting effect: Suspended decoupled floor ..  Superbly interesting effect: Suspended decoupled floor ...  Playback Listening  Forum     0  12554  10-08-2010
  »  New  Midbass impedance bumps -- why and what to do?..  You need to stop deceive yourself....  Horn-Loaded Speakers Forum     18  137756  10-21-2010
  »  New  Mystery of bass horn calibration: Radiating Surface Dee..  Mystery of bass horn calibration: Radiating Surface Dee...  Horn-Loaded Speakers Forum     0  11858  02-03-2011
  »  New  Impulse response, short notes and midbass horns...  A possible solution to better impulse?...  Horn-Loaded Speakers Forum     14  86890  06-13-2011
06-05-2013 Post does not mapped to Knowledge Tree
rickmcinnis
Posts 27
Joined on 10-18-2010

Post #: 451
Post ID: 19443
Reply to: 19438
I have noticed a similar phenomenon
fiogf49gjkf0d
And thought it was in my head.
Not that I have infra-woofers ...
When listening to the individual parts of my system I had noticed that when the 75 hz horns were played by themselves there is a bloat in the 100 hz region that goes away when the subwoofers are returned into the system.
It is not related to relative phase because with either polarity the bloat would go away so it is not simple cancellation.  Of course, it was different eac way, but ...
Seems if the waveform is not put back together, even if imperfectly put back together, something goes wrong.
So I think this affects frequencies even higher than where you experienced it.
Good news that you no longer have to concern yourself with magnetizers!
We are all unbelievable idiots so don't feel bad.  
06-05-2013 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,547
Joined on 05-28-2004

Post #: 452
Post ID: 19444
Reply to: 19443
It looks like how it works
fiogf49gjkf0d
The effect indeed is very interesting. I think it has to do with some complex phase interaction what the high knee of ULF squashes the lower knee of midbass. From general perspective I would say that this is not good as I would prefer to observe summation not cancelation. However, this all happens at lower octaves where it very hard to manage anything phase related as the length of the wave is very long. Hypothetically one can run the ULF at a specific phase point. Like cheap subwoofers have a phase dialers that allow selecting any of the 360 degree point. Then we could dial in the exact phase, assuring that we have phase summation at midbass/ULF interaction. There are two problems with this approach. First it is impossible, or very hard to make delays with screwing with sound. At LF it is somehow possible but it is very, very, very hard. Second if we do have the proper midbass/ULF interaction then the midbass have to be build taking this ULF-inspired decay under consideration.  It is practically impossible as to observe the effect possible ONLY after the midbass is build. Looking at the reality of a real life room and some absurd cannels positioning (like midbass in my room) it is unfeasible to predict anything in design stage.

In practical world I think the way how it is done in Macondo is very optimal. The midbass is made as it shell be but the ULF is sitting at transition slope. The fact that it is at transition slope made is very very flexible and it might run at virtually unlimited gain. So, sliding the ULF up and down of the transition slope I in reality modulate the ULF decay, do I do summation or cancelation, I do not really know  if it is summation or cancelation and do not particularly case. This is not how I envisioned it before but it looks like how it works…

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
05-10-2016 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,547
Joined on 05-28-2004

Post #: 453
Post ID: 22611
Reply to: 13597
The end
fiogf49gjkf0d
Well, that is kind of the end of the little midbass era. As we begin to prepare the moving in a month I removed the Vitavox driver from Midbass horns. The even went unnoticed in my family but I have a lot in my hard to feel about. The new house is great, and I am pretty sure that I will be able to get in new listening room a decent Sound but I do not think I will be able even to undertake the project like I did with my midbass horns. I truly believe that no one able to appreciate how elegant it was done in term of room incorporation and how effective it was sound.


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
05-10-2016 Post does not mapped to Knowledge Tree
mats
Chicago
Posts 76
Joined on 09-18-2005

Post #: 454
Post ID: 22613
Reply to: 22611
Many share
fiogf49gjkf0d
Ah Romy, of course it's a big deal. You did something very special, and shared it with the world. You brought Bruckner into your home, followed you heart, and we all shared a little in the joy. It was truly amazing and inspiring on so many levels. Take it all with you in your heart, to your new home, and play it again for all of us. Well done Cat, very well done. 
12-17-2016 Post does not mapped to Knowledge Tree
Scott L
Posts 17
Joined on 02-26-2008

Post #: 455
Post ID: 22895
Reply to: 22611
A new house --- again
 Romy the Cat wrote:
fiogf49gjkf0dWell, that is kind of the end of the little midbass era. As we begin to prepare the moving in a month I removed the Vitavox driver from Midbass horns. The even went unnoticed in my family but I have a lot in my hard to feel about. The new house is great, and I am pretty sure that I will be able to get in new listening room a decent Sound but I do not think I will be able even to undertake the project like I did with my midbass horns. I truly believe that no one able to appreciate how elegant it was done in term of room incorporation and how effective it was sound.


Sorry Romy, but it has been several months since I have been here. I had only recently been drawn back here because of the topic of the
Infinite baffle bass.

Changing homes again with an elaborate stereo system is no small undertaking. I would not be able to do it.

Best of luck to you and your family !!
04-28-2018 Post does not mapped to Knowledge Tree
vintageman
Posts 2
Joined on 07-17-2014

Post #: 456
Post ID: 24824
Reply to: 14041
Vitavox 15/40
Hi how did your vitavox speaker project go?Im looking for a 1956/57 single original cone 15/40 to complete my vitavox project. Anyone got one?
Page 19 of 19 (456 items) Select Pages:  « First ... « 15 16 17 18 19
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  45Hz Bass Horn..  Can We Ever be Saved From Ourselves?...  Horn-Loaded Speakers Forum     23  239194  09-19-2006
  »  New  8" Goto Woofer for 60Hz Horn..  It's not a Goto 8in driver...  Horn-Loaded Speakers Forum     5  62277  11-03-2008
  »  New  The Macondo’s Upper Bass Channel: what is next?..  Görlich again...  Horn-Loaded Speakers Forum     30  199767  10-28-2007
  »  New  Jessie Dazzle Project..  Will this better to be auditable?...  Horn-Loaded Speakers Forum     172  1153861  08-03-2007
  »  New  Romy The Cat's new Listening Room..  Won't be the last time he makes that trip!...  Audio Discussions  Forum     478  1922160  03-28-2010
  »  New  Problems with horns: upper bass ..  Must it be about loading?...  Horn-Loaded Speakers Forum     109  870610  03-25-2005
  »  New  Midbass Horns and Real Estate...  Just a youtube video......  Horn-Loaded Speakers Forum     247  1530189  07-26-2009
  »  New  Macondo’s lowest channel...  Good highs...  Horn-Loaded Speakers Forum     148  973205  09-15-2010
  »  New  Practical Guide for Back Chambers Tuning...  Back chamber’s cost-benefit....  Horn-Loaded Speakers Forum     5  51872  10-21-2006
  »  New  Superbly interesting effect: Suspended decoupled floor ..  Superbly interesting effect: Suspended decoupled floor ...  Playback Listening  Forum     0  12554  10-08-2010
  »  New  Midbass impedance bumps -- why and what to do?..  You need to stop deceive yourself....  Horn-Loaded Speakers Forum     18  137756  10-21-2010
  »  New  Mystery of bass horn calibration: Radiating Surface Dee..  Mystery of bass horn calibration: Radiating Surface Dee...  Horn-Loaded Speakers Forum     0  11858  02-03-2011
  »  New  Impulse response, short notes and midbass horns...  A possible solution to better impulse?...  Horn-Loaded Speakers Forum     14  86890  06-13-2011
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