Wojtek wrote:

but I attached a double layer of 3'x5' cement boards (wonder board) under the suspended floor (crawl space) and it seems to help with bass a little. It's a cheap and fairly easy solution ($9 for a board) if you have an acces and helping hand.

Wojtek, interesting, can your elaborate on it? You placed under the floor (from the basement) the 3'x5' cement boards right under the speaker? How you were able to do it? Did you floor supporting beams allow you to do it? What is the distance between your cement boards and the floor? Is the floor carpeted? How much dB attention you get at 100Hz at the location of your cement boards?  When you said “seems to help with bass a little” then it is your subjective feeling (that might be due to electricity change) or it is the actual measurable change of amplitude? What the percentage of the whole rooms represent those 3'x5' space?  What LF section your and how you drive it?

It might be an interesting solution, I just need more data.

Romy the Cat wrote:

Ok, I do officially like this “Battle Road” hours. Upon many considerations (and there are 4 ways to implement the midbass horn in that room) I have inclined to my leading idea to do it elegant and with time alignment.  The drawing below and a above are way out right proportion and dimensions are by my visual assessment. Still the idea is there.  I am considering to put two straight, irregular pentagon  or heptagon shaped, 12’-13’, Hypobaric 0.7, 45Hz horns in the attic of the house and to have the mouths to fire into the bid room. This will kill with one hit the following objectives: 1)      Not notable in the room 2)      Time-alignable 3)      Not direct radiation and allowing wave maturation 4)      Do not destroy property too much 5)      Kill the fist reflection for the MF channels 6)      Elegant. I do see in this a tremendous opportunity.

Hm, I was so proud about myself for a few days. I thought I have a key how to render my midbass horn in perfects time-aligned position and to make it literally invisible in my new room. It was such an elegant design!!! It still might be renderable but I discover some aspects in the new house that can make it very hard to implement. I was already thinking about the color patter of my new horns! Such a blow!!!

Anyhow, if I get this house then the configuration of the room still allows me to implement very good midbass horn but it will be no time alignment.  That is not good and I need to think about it. To have midbass with 12-15msec delay… I do not know if I want even to experiment with it.

Romy the Cat wrote:

Hm, I was so proud about myself for a few days. I thought I have a key how to render my midbass horn in perfects time-aligned position and to make it literally invisible in my new room. It was such an elegant design!!! It still might be renderable but I discover some aspects in the new house that can make it very hard to implement. I was already thinking about the color patter of my new horns! Such a blow!!!

miab wrote:

Romy the Cat wrote:   Hm, I was so proud about myself for a few days. I thought I have a key how to render my midbass horn in perfects time-aligned position and to make it literally invisible in my new room. It was such an elegant design!!! It still might be renderable but I discover some aspects in the new house that can make it very hard to implement. I was already thinking about the color patter of my new horns! Such a blow!!!   What did you find in the new house that will not allow you to do that? There might be a way around it.

Miab, I thought about this properly a lot. There is a lot in this house that I like from audio perspective. I like how the listening room talks with the other rooms and a few other moments. The most important is that the listening room allows using a semi-long-wall configuration, has enough for my objective volume and still not huge to lose the near-filed configuration.  I have been looking for right house from July and this is the very first that i was able to like in the neighborhood that I like, having other amendment trhat I like and is in my price range. I think the size of the listening room is perfect for what I am trying to accomplish: not too small to let Macondo to breathe free but not too large where Milq would clip to handle the power.

When I saw the house for a first time, I literary in my car right after the open house drew a plan how the midbass hours might be implemented in there. Below is the representation of the idea. The sealing below the moths of the midbass horns is cathedral, with wings doing right and left. The space above is a regular triangle roof with attic. So, there is a triangle wall in the second floor between the cathedral listening room and the house attic, where both roofs shape “T”. So, my idea was to cut off that triangle wall on the “second floor” of the listening room and slide in the attic a pair of the midbass horns, having their mouths to be the triangle wall. It is 19 feet by 6-8 feet – a good dimension to have two mouths.

Upon further inspection I have learned in the location what the horns shall be there are the beams from the perpendicular roof. That sucks! There is an option however. The beams that are in my way are the legacy of the attic roof but it is still under the cathedral roof. So, hypothetically the beams can be cut to accommodate the horns but I am afraid that it will screw up the structural integrity of the attic roof. So, I might bring a roof specialist to evaluate if those internal diagonal studs might be removed. Alternatively it would be possible to keep the existing beams in the mouth of the horns. I wish it were easier…

I do have alternative ways how the big horns might be done in the room (option B) but I will lose the time-alignment.

Yes, Jessie, this is the direction that I am contemplating - to put up a vertical poll to support the attic main beam and to cut the 4-5 diagonal lowering beams that lead to my working triangular wall.  Also the residue of the attic roof under the cathedral roof needs to be removed. My initial sentiment was that it would be essay but not I see that it will be not, if it is ever doable.

If I get the house then I would move in, get conformation from professional roofers or architect that what I would like to do is doable. Then I would devise a detail plan for the horns and for the way how the horns would be imbedded into the house. I am planning to recruit a horn builder I know to overview the design of horn and to consult my local woodworker. Facing and accepting the task is not a problem to me if I clearly see that the project will be successful and if I have all necessary lavers to navigate the project.

The alternative option is to put the horns in the 4 large 5x7 feet windows that the opposite wall has but it has few moments that I do not like. The time-alignment is the key for me and with midbass-horns are behind the MF channels is too much delay. Second, is that I would like to preserve front wall of the listening room. There is a lot of potential in it. It has 4 huge window-doors 5x7’ that allow making the whole width of the listening room wide open to open air.  Right behind the window-doors is a deck and then a forest. I do not know how the birds singing and sound of the near stream will be compatible with my Bruckner but I very much like the idea of playback be able to operate in a virtual open air. It looks like the neighbors will be not the subject in this house as they are 1) too far 2) the cathedral room will be doing the detractively shaping and the sound will go mostly to the forest. So, I would prefer do not put the front to the front wall…

As you see, Jessie, the house is very promising and I can’t wait to start paling with that room!

jessie.dazzle wrote:

As you pointed out, you've finally found a place with many positive points; this gives it, for you, a certain value beyond its purchase price. Over here where all real estate is not only valuable, but down right precious, people do not hesitate to rip into the main structure of very old, multi-floor buildings, often times with 4 or 5 floors of families living above, slip in a few big jacks, add a huge beam, and knock out an offending wall.

Thanks, miab

I am encouraged that your guys feel that it is doable. I was cowling in the attic and had very bad feeling. The beams (you call them trusses) are VERY thick and the attic is not a full waking. The house has center AC and my red triangle red wall has two vents. I thought that it is not a big deal to relocate them but being the vents are 2-feet-wide diameter.  The roof is cut just to accommodate the vent’s pipes, so the Red Wall is nit well reachable from attic. So, the Red Wall needs to be collapse from the cathedral room and then the attic space needs to be freed from there.

I presume that horns need to be assembled in the cathedral room, lifted up and slide to the attic, stopping mouths were the Red Wall used to be. Then the Red Wall need to be rebuilt around the mouths of the horns.  If and when I moive I would need some to evaluate all of this. I would LOVE to do is as it would make the horns time-alight, load cathedral ceiling from the mouth of the horns and even will extend the volume of cathedral room.  Funny it will not even diminish the cost of the house and it will use the space that is not being used now.  I wonder in 50 years what I will be long gone the people will be wonder what the hell formers owners were trying to do in there….

The 40Hz, ½ size, 13’-14’ hyperbolic at .7 midbass in time-align location and invisible in the room (with complimentary LF section)? That might be a LOT of fun! I hope it would all work out.

Ok, the story about the Red Wall is getting stranger …. Further thinning about all of it I came up with a brilliant idea.

The Red Wall has two air-conditioner wants. So, if the horns are built on the Red Wall then why do not make the rents … in the belly of the horns. Look, I install the big horns with a minor tilt toward to the room. At the ¾ of the horn I make a went and connect the air-conditioning pipe to there. Now the air-condoning in blowing inside the belly of the horn and since the cold air is heavier then hot air it will descent into the room and do not go up to the horn driver.  Since the horn will be crossed at let say 150Hz then I do not think that the vent size will be even notable by the wave in the horn. I love the idea a lot! I just concern that the horn will amplify for 6dB the noise from the air passing from the vent…

Paul S wrote:

….it would be easier to speculate if we had some photographs of the areas we are discussing.