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  »  New  45Hz Bass Horn..  Can We Ever be Saved From Ourselves?...  Horn-Loaded Speakers Forum     23  306286  09-19-2006
  »  New  8" Goto Woofer for 60Hz Horn..  It's not a Goto 8in driver...  Horn-Loaded Speakers Forum     5  84540  11-03-2008
  »  New  The Macondo’s Upper Bass Channel: what is next?..  Görlich again...  Horn-Loaded Speakers Forum     30  279625  10-28-2007
  »  New  Jessie Dazzle Project..  Will this better to be auditable?...  Horn-Loaded Speakers Forum     172  1509210  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  2779309  03-28-2010
  »  New  Problems with horns: upper bass ..  Must it be about loading?...  Horn-Loaded Speakers Forum     109  1130363  03-25-2005
  »  New  Midbass Horns and Real Estate...  Just a youtube video......  Horn-Loaded Speakers Forum     247  2062229  07-26-2009
  »  New  Macondo’s lowest channel...  What truly are you tryin to accomplish?...  Horn-Loaded Speakers Forum     150  1343862  09-15-2010
  »  New  Practical Guide for Back Chambers Tuning...  Back chamber’s cost-benefit....  Horn-Loaded Speakers Forum     5  72919  10-21-2006
  »  New  Superbly interesting effect: Suspended decoupled floor ..  Superbly interesting effect: Suspended decoupled floor ...  Playback Listening  Forum     0  17309  10-08-2010
  »  New  Midbass impedance bumps -- why and what to do?..  You need to stop deceive yourself....  Horn-Loaded Speakers Forum     18  187118  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  16593  02-03-2011
  »  New  Impulse response, short notes and midbass horns...  A possible solution to better impulse?...  Horn-Loaded Speakers Forum     14  123092  06-13-2011
09-25-2010 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,049
Joined on 05-28-2004

Post #: 321
Post ID: 14557
Reply to: 14553
The ego time capsule.
fiogf49gjkf0d
When my midbass horns projects will be finished the horns will be peaty much organic part of house and without looking at this thread an ordinary person would never understand what is behind and what it is for. When we look at reasoning for Carnac Stones or the Nasca images then we also are absolutely clueless what is it for but thousands year back I am sure people had no problems to understand what they were doing.
 
I heard that the people who built the contemporary Mt. Rushmore sculpture thought among the same lines and reasonably felt that in 5000 years no one would remember who George Washington or Theodore Roosevelt were, or that Unites States even exist as a country. The 4 curved in granite heard will however stay and the historian will scratch foreheads thinking who the hell the people on the mount are.  So, the Mt. Rushmore builders implanted into the mount belly a titanium vault with messages made on porcelain panels. The messages contain explanation what is all about. The panels are sealed in teakwood box and imbedded into a few tone polished granite. The idea is that this type of time capsule might live hundreds thousands years being discovered in future it will give perspective to Mt. Rushmore sculpture.  As much as I hate Mt. Rushmore  as the similar part of crappy art-Americana but the whole concept of sending a message future civilizations via this mean I find is cleaver one.

OK, my horn and my house will not live 1000s years. I will be lucky if it live for extra 30-50 years. Still in 30-50 years the house will be without me and I very much see the questions on the faces of the future house owners: “What the hell is it?” So, I decided as I finish this there to print the thread out on some kind of non-rotting wax paper and to stick my little time capsule for the attention of whoever comes in future...

The Nice Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
09-26-2010 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,049
Joined on 05-28-2004

Post #: 322
Post ID: 14564
Reply to: 14553
Temptations!!!
fiogf49gjkf0d
The entire morning I am cleaning house and listening WCRB, warming myself up for 3MP broadcast of Riccardo Muti leads Chicago with Verdi's Requiem. Hey, did I tell you that am listening my new midbass horns?

Well, I do and I do not. The throats of the horns are still plugs with a few inches of foam tampons and I am listening them as they are. I have so much Temptation to remove the plugs and to hear the thing but I will never will be able to put plugs back – there is a LOT of dirt in the hams not and will be even more this week.

Can I say anything about sound of the horns with the plugs? I do not think that anybody, including me care about this sound but I have to tell you that it is VERY funny sound. Not the sound of the horn but the horns localization. Even stain in the mid of the room the horns do not indicate too much where they are and the sound come very defused from the entire room, it is in way how the sound of organ in a church. Sure the foam plug is a hell of low pass filter… still it is very difficult to say anything now as I think now the driver work ONLY into the front chamber and the resonant frequency of the driver is no less then 150Hz.

I can wait what I will remove those damn plugs….

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
09-28-2010 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,049
Joined on 05-28-2004

Post #: 323
Post ID: 14586
Reply to: 14553
The first shaking test.
fiogf49gjkf0d
The horns are still plugged but I desired to test if the vibration from the midbass hors will be detectable on the listing room floor. The mouth of the horns does vibrate. Well, it is not a vibration but rather some shaking – pit in this way – if I hold my hand on the mouth then I do feel that the horn operates.

So, I desired to play it at full throttle. I maxed out my preamp and played a fragment from Queen of Spades. There is an episode in first act when a ghost comes to Countess and predicts that she will die when a yond lover will force her to reveal the magical secret of the Three Cards. As soon the prediction stated the orchestra dive into a magnificent fortissississimo, the whole orchestra with drams, brasses and strings introduce the hit of fate and then hold it for a while.

I played it a few time and was trying to detect if anything will be sensing on floor. It looks like it was free from any bone-transmitted vibration. So far so good. If it behaves like this without the throat plugs then my concerns are not warranted.

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
09-28-2010 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,049
Joined on 05-28-2004

Post #: 324
Post ID: 14587
Reply to: 14553
The very right color.
fiogf49gjkf0d
 Romy the Cat wrote:

Midbass_progress_156.JPG

 


I was helping my carpenter and was laying some layers of compound on my triangular wall (wait until it dry is a waste of time, so we do in it two shifts day and night) and I caught myself on the thought that I am  lucky that I did not went for brick wall finish of my wall. This pastel color of the room I find works so wonderfully on the horns – I truly fall in love with the light color of these horns. My carpenter is convincing me that when it will be done then the wall will be so smooth that that one would feel that the horn is not the part of the wall. Very-very good. Can’t wait to turn the lights under the second section window – it will make the horns to feel very deep and in way mysterious… Very enthusiastic!!!

Midbass_progress_157.JPG

 




"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
09-29-2010 Post does not mapped to Knowledge Tree
guy sergeant
United Kingdom
Posts 260
Joined on 08-03-2004

Post #: 325
Post ID: 14589
Reply to: 14587
Steps
fiogf49gjkf0d
Is there no way to smooth out the visible steps in the latter part of the horn's expansion or would you prefer not to?
09-29-2010 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,049
Joined on 05-28-2004

Post #: 326
Post ID: 14591
Reply to: 14589
The invisible Cheshire horns.
fiogf49gjkf0d
 guy sergeant wrote:
Is there no way to smooth out the visible steps in the latter part of the horn's expansion or would you prefer not to?

This is very interesting one. Yes, there is a way to smooth out the visible horizontal steps. The hors seen is very thick behind the steps and a running belt sander with coarse surface will get rid of the steps. My estimate is that it will take 3-4 hours per horn, including the finishing of the jointing chords between the vertical wall and top/bottom of the horn.  That was my initial intend and I did not do it juts because I did not have before the horn lifting. I just smoothed then a bit but I did not get rid of them. I figured that there is an access to the steps from a stepladder and I thought that if I would like to do it then I will do it with the horns installed.

After the horn got hoisted I frankly do NOT feel any inducement to deal with the steps. Under normal circumstances the steps are hardly visible with normal lights in my room. The picture above is made with strong fluorescent lights installed on the SIDE ridges of the cathedral ceiling. This side lighting emphasizes the steps but I hardly ever use this lighting in my room as it is too bright – 32x40W elements, I use it only for room cleaning.  Now, the funny part is that I kind of turn to like the steps as I do like how the light divide itself on the shaded on each step. So, I am willing to keep the steps as it for now and see how it goes.

One thing that I would mention is that in this thread we pay attention to the horn but if you in my room you would hardly notice them. I have the former house owner stop by another day we maintain a good relationship and she visit me occasionally.  She lived in here for over 25 years or so, she built the cathedral ceiling from scratch and standing in the room she did not recognize that the wall have horn in it. She saw that I do some construction in the room but until I pointed her attention to the horns she did not acknowledge them. The room is interesting – all attention is kind of “forced” to the opposite side of the room and there is truly not need to look back at the triangular wall. The triangular wall is truly a dream location for my horns and again – I am very glad that I did not finish them in any more attention-grabbing manner.

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
09-29-2010 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,049
Joined on 05-28-2004

Post #: 327
Post ID: 14599
Reply to: 14591
Under normal light. Some religious aspects.
fiogf49gjkf0d
Below is how my midbass horns feel in my listening room user normal lighting if evening listening. The horn look a bit too dart but they are the same density as the walls in the room. The horns feel darker because the Triangular wall is all white, from join compound. We still will repaint the horn 4 front section with 50% liter density then they are now to match the color of the ceiling. According to my schedule tomorrow shall be the last day of the project. I quest we did blow it up for 2-3 days as the plaster dries longer than we thought.

Midbass_progress_158.JPG

Anyhow, it looks like this weekend it will be a ceremonial removing of the horn's plugs. I spoke with a guy who is a divinity specialist and he proposed to christen the horns. I guess we need to get drunk and to the smash a bottle of champagne of the horns mouth, I think the choice of the horns, left or right will be upon the priest’s political inclinations…. I thought to bring a rabbi or kohanim to do the job but I afraid that they will circumcise the horns and then I will lose some bass response. With priest I see problem as well as he is accustom  to launching boats at Mariners and he insisted that after christening I need to refer to my horns and “she”. Sorry, I refuse to assume that my midbass horns will have no bolls… Also, the priest insisted to name the horns but it will be not birth but marriage Midbass horns with Macondo. The priest insisted that a marriage might be only between a man and women and not between two pieces of wood.  I am glad that he did not mention that Macondo is black and the midbass horns are white. I think he is clueless. I need to find somebody among Muslims… on the other head the rabbi told me that for 3 easy payments of 29.95 he will perform a ritual in any religious tradition. I told him that then I would prefer a cheetah’s ceremonial dance after she kills an antelope.  The rabbi told that I am a godless Moron… Hey, but I am a Moron with my 42Hz horn in time-alighned position….


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
09-30-2010 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,049
Joined on 05-28-2004

Post #: 328
Post ID: 14604
Reply to: 14599
A second minor screw up: the horno-lights
fiogf49gjkf0d
Today I realized that light windows in my horns are before the throat plugs and I can ease to setup the light in the horns. I bough very nice 7W defused light, cold running light sources and mounted them to the light windows of the horns. I can’t say that I like the result. The horn looks stupidly and the room filled with very ugly and very uncomfortable light.  Perhaps I need to play with density, diffusion and the most important color of the light. Anyhow, the first result with horno-light is not too thrilling.

Midbass_progress_159.JPG




"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
09-30-2010 Post does not mapped to Knowledge Tree
Paul S
San Diego, California, USA
Posts 2,570
Joined on 10-12-2006

Post #: 329
Post ID: 14605
Reply to: 14604
Another "Mood Enhancer"?
fiogf49gjkf0d
My first thought on looking at your photo: "Night On Bald Mountain"!  This particular set-up might work especially well for Halloween Hi-jinks!

You might even install a remote-actuated "turntable" with different filters... 


Best regards,
Paul S
09-30-2010 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,049
Joined on 05-28-2004

Post #: 330
Post ID: 14606
Reply to: 14605
I would not do the horno-lights if I knew.
fiogf49gjkf0d
As now I feel that the whole idea with light was a bit corny. I actually like the horn feeling the room without lights, or with the lights that I have in the room - I have a lot very good light solutions in the room that I do like. Thankfully the turn lights off take just a switch. I still think the horno-lights might serve some sustaining service (like cleaning dust from horn or to search for signs of moisture) but I do not think that I will use it as light source. I think it was a mistake.  There is no damage from the  horno-lights windows, just some wasted time to make them….

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
10-01-2010 Post does not mapped to Knowledge Tree
N-set
Gdansk, Poland
Posts 609
Joined on 01-07-2006

Post #: 331
Post ID: 14612
Reply to: 14605
Remote controlled LED
fiogf49gjkf0d
 Paul S wrote:
My first thought on looking at your photo: "Night On Bald Mountain"!  This particular set-up might work especially well for Halloween Hi-jinks!

You might even install a remote-actuated "turntable" with different filters... 


Best regards,
Paul S


I once used RGB LED lights, which even came with a remote control to change colors and different light-changing programms,
to lit my concrete library shelves.
Got a nice effect. Maybe you can use several RGB hi-power led bulbs, pointing them more toward the mounth?
Best,
jk



Cheers,
Jarek
STACORE
10-01-2010 Post does not mapped to Knowledge Tree
cv
Derby, United Kingdom
Posts 173
Joined on 09-15-2004

Post #: 332
Post ID: 14615
Reply to: 14612
Giant robot halloween lights
fiogf49gjkf0d
Romy - forget pulling the throat protectors out... just blast them out with a cheesy 1812 and have the canon shots modulate the lights... Solves the issue of the ceremonial initiation too in secular fashion...

Seriously though, I can't wait to hear (vicariously) how this all turns out...

cheers
cv
10-01-2010 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,049
Joined on 05-28-2004

Post #: 333
Post ID: 14617
Reply to: 13597
The horns are officially opened.
fiogf49gjkf0d
The paint has dried and the plugs from throats are removed. The horns are officially opened. BTW, they sound like shit.

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
10-01-2010 Post does not mapped to Knowledge Tree
jessie.dazzle


Paris, France
Posts 456
Joined on 04-23-2006

Post #: 334
Post ID: 14618
Reply to: 14617
School is in session
fiogf49gjkf0d
So they will need some "teaching".

The most difficult students are often the most promising.

Are you able to say whether the problem is due to the horn position relative to the room, or to throat diameter relative to the driver diameter?

jd*




How to short-circuit evolution: Enshrine mediocrity.
10-02-2010 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,049
Joined on 05-28-2004

Post #: 335
Post ID: 14619
Reply to: 14618
The Completion. Sad for far.
fiogf49gjkf0d
OK, my carpenter has finished today his part, go his final check and the project is officially over for him. Some minor things I will ask him to correct next week. Also I will ask him to put a narrow slightly darker border between horn and the wall, to make it as but more distinctive. We will try next week a few version and I am sure will come with something sensible. Generally I do like how the horns look like, well, it will be better.   I would need to find better looking air vents, not the temp crap that we put it. The sound is a different story….

What we removed the plugs and heard the horns for a first time I did expected as triumph. Instead it was a disaster. It is was not bad sound but the sound that clearly indicated that something is very wrong: supper compressed, complete absent of LF, huge HF extension. The whole horn sounds like a bad MD driver. I took a meter and measured the resonance frequency- it was like I never seen before - it has no resonance. I mean the driver from 14Hz to 150HZ gas absolutely linear impedance as it has no active load. I look at all of it and felt so tiered and I walked out if it. I think in the new room the horn is shooting into the wide open sealing and see no reflection  and all my back chamber calculation and testing the worked so great for horns in basemen is absolutely not applicable now. I need to redo my entire tests with the horns shooting preaty much in open air… Now today however…

Midbass_progress_160.JPG

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
10-02-2010 Post does not mapped to Knowledge Tree
cv
Derby, United Kingdom
Posts 173
Joined on 09-15-2004

Post #: 336
Post ID: 14621
Reply to: 14619
Horn trauma
fiogf49gjkf0d
That's horribly disappointing for now but I think Jessie is right.

Firstly, as you essentially said, I wonder if the horns are coupling into the room such that you actually have much bigger devices than you thought... you are actually sitting inside the horn, in other words. Do they sound any different with the door open, or standing way out in the garden?

2) What happens if you try and introduce a discontinuity across the mouth, say with a large blanket or two stretched across?

3) Obviously it will be interesting to see what happens with the back chamber open and foam removed...

Take hope; the impedance plot could imply you've managed to create some 10Hz horns by accident, and if they can be tamed... but, finally, I do wonder:

4) They're not playing out of phase by any chance?

Even if not, just look at the damned things - they can't fundamentally sound as bizarre as you've described without something being quite wrong in the setup!

Fingers crossed that a new day brings something quite different...




10-02-2010 Post does not mapped to Knowledge Tree
el`Ol
Posts 225
Joined on 10-13-2007

Post #: 337
Post ID: 14622
Reply to: 14621
About the foam
fiogf49gjkf0d
Romy, I think you have neither a system with back chamber now (because the foam is closed pore), nor a "true compression driver" (because the foam is not rigid). Probably you mainly have a second vibrating system coupled to the cone that enhances mechanical daming.
10-02-2010 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,049
Joined on 05-28-2004

Post #: 338
Post ID: 14623
Reply to: 14622
“Give me back my broken night, my mirrored room, my secret life. It's lonely here, there's no one left to torture.”
fiogf49gjkf0d
I woke up and thinking about the horn problem with fresh head I am thinking what did wrong. I did not measure the frequency response of the horn – I did not see a need for it – the sound of the thing is way beyond where it needs to be measured.

I discard the CV’s proposals that it might be somehow room coupling related – room coupling might impact sound dramatically but not this way. This thing sound much-much worse it sounds literally broken. The very main question is what is the difference between this state of the horns now and when they were in basemen. In basemen it was glorious, in the listening room is very bad – what went wrong? The most important is what happen with my impedance? What it is so flat and see not reactance. I called to Bruce Edgar last night and he told me that such a flat impedance is a very seldom positive indication and it suggests that the horn see no reflections. Still, I do not see a lot of positivity in it- I never seen it, I do not like it and in a way afraid it. If a driver’s impedance behaves like static resistor then something is very wrong.

I have a few leading proposals that I will test today:

1)      The foams from back chamber pushed itself through the window of basket and touched the driver cone. Sonically it is very likely but knowing HOW I did the thing I think (hope) it did not happen.  Also, both horns have identical impedance behavior – does it means that foam hold both diaphragms in same way?
 
2)       The refractive behavior of the horn in basement and in my room is so hugely different that it screwed up my primary resonance measurements. The perfect 42 Hz resonance that I was able to get in basement was not my imagination, it was a fact but how about it is as just a reactance of the horn to the wall it was shooting at? If so then I might made the back chamber too small and over tight the cone with pressure behind it. It is possible but also not likely as if this case the primary resonance shall go all the way up but I did not see it even at 140Hz.
 
3)      Burning in the drivers with plugs in the throat had damns them somehow…
 
Anyhow, I have no idea what it is and I need to provoke the horn to tell me what went wrong.

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
10-02-2010 Post does not mapped to Knowledge Tree
el`Ol
Posts 225
Joined on 10-13-2007

Post #: 339
Post ID: 14624
Reply to: 14623
Cone-foam coupling
fiogf49gjkf0d
 Romy the Cat wrote:


1)      The foams from back chamber pushed itself through the window of basket and touched the driver cone. Sonically it is very likely but knowing HOW I did the thing I think (hope) it did not happen.  Also, both horns have identical impedance behavior – does it means that foam hold both diaphragms in same way?
 


I think the foam vibrates with the cone even if it is not directly touching it. And even if the damping of the foam is not the reason for the flat impedance curve there will still be non-linearities. Was the horn fully assembled when you tested it in the basement?
10-02-2010 Post does not mapped to Knowledge Tree
oxric
Posts 194
Joined on 02-12-2010

Post #: 340
Post ID: 14625
Reply to: 14623
Misbehaving horns.
fiogf49gjkf0d
 Romy the Cat wrote:
I woke up and thinking about the horn problem with fresh head I am thinking what did wrong. I did not measure the frequency response of the horn – I did not see a need for it – the sound of the thing is way beyond where it needs to be measured.


I have a few leading proposals that I will test today: 


3)      Burning in the drivers with plugs in the throat had damns them somehow…
 
Anyhow, I have no idea what it is and I need to provoke the horn to tell me what went wrong.

The Cat


Hi Romy:

I doubt that this is the answer to your horn problems but if you recall, when we talked about the possibility of high temperatures affecting performance, maybe you might investigate whether the drivers still perform as they should given that 'burning in' with the throats 'plugged' might have resulted in very high temperatures building up with the drivers effectively sealed back and front, even with relatively low power requirements.

Just a thought.

Clearly the first thing to do in my mind is check state of the drivers, then take out foam and see what happens. You may also want to check the wiring you have used, given the extensive lengths involved and take some measurements there, possibly use some shorter lengths by moving some amps closer to drivers.

I hope it all works out as I love the idea so much I would like to copy it!!

All the best
Rakesh
Page 17 of 23 (456 items) Select Pages:  « First ... « 15 16 17 18 19 » ... Last »
   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  306286  09-19-2006
  »  New  8" Goto Woofer for 60Hz Horn..  It's not a Goto 8in driver...  Horn-Loaded Speakers Forum     5  84540  11-03-2008
  »  New  The Macondo’s Upper Bass Channel: what is next?..  Görlich again...  Horn-Loaded Speakers Forum     30  279625  10-28-2007
  »  New  Jessie Dazzle Project..  Will this better to be auditable?...  Horn-Loaded Speakers Forum     172  1509210  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  2779309  03-28-2010
  »  New  Problems with horns: upper bass ..  Must it be about loading?...  Horn-Loaded Speakers Forum     109  1130363  03-25-2005
  »  New  Midbass Horns and Real Estate...  Just a youtube video......  Horn-Loaded Speakers Forum     247  2062229  07-26-2009
  »  New  Macondo’s lowest channel...  What truly are you tryin to accomplish?...  Horn-Loaded Speakers Forum     150  1343862  09-15-2010
  »  New  Practical Guide for Back Chambers Tuning...  Back chamber’s cost-benefit....  Horn-Loaded Speakers Forum     5  72919  10-21-2006
  »  New  Superbly interesting effect: Suspended decoupled floor ..  Superbly interesting effect: Suspended decoupled floor ...  Playback Listening  Forum     0  17309  10-08-2010
  »  New  Midbass impedance bumps -- why and what to do?..  You need to stop deceive yourself....  Horn-Loaded Speakers Forum     18  187118  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  16593  02-03-2011
  »  New  Impulse response, short notes and midbass horns...  A possible solution to better impulse?...  Horn-Loaded Speakers Forum     14  123092  06-13-2011
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