Curious about horn sub

[markusA]

Maybe I should do the legwork myself but you could spare me a lot of reading...
Sometime in the future I might be forced into building a sub for the lowest ocatves.
I tend to forget numbers so feel free to correct me if something seems off..

Let's make a couple of assumptions.
20-80Hz @110dB. (20-60 might work but 80 seems like a standard goal?)

How small can you make it if you opt for either a TH or a FLH?
What kind of driver would you need? (10",12",15",...?)
I'm thinking corner loaded and using two might be a possibility?
How would these compare with a CB+LT or ACE-Bass?
Pwerful amps might be easier to obtain than building a horn?

This is just me feeding my curiosity, maybe we can get a rewarding discussion going somehow?

[Jmmlc]

Hello,

What else?

Hello,
http://www.diyaudio.com/forums/attac...floor-horn.jpg


http://img209.imageshack.us/img209/7...024x768qs8.jpg

http://www.diyaudio.com/forums/attac...d-basshorn.gif


Best regards from Paris, France

Jean-Michel Le Cléac'h

[markusA]

That's awsome. Lol
Maybe not as small as I was hoping for but very impressive.
Although hiding them under the floor is ingenious I sort of doubt my landlord appreciating that form of redecorating.

[weltersys]

Originally Posted by markusA

That's awsome. Lol
Maybe not as small as I was hoping for but very impressive.
Although hiding them under the floor is ingenious I sort of doubt my landlord appreciating that form of redecorating.

You need to define what is "small".
20Hz to over 200 Hz can be done at over 110 dB just using a 7.76 cubic foot (actual built size) ported cabinet with a pair of high Xmax drivers.
With room/corner gain, a single half that size may hit 110 dB.

Art

[Jmmlc]

Hello,

The stand type bass horn shown in the following attached picture used to replace 3 ported cabinet using the famous JBL 15GTI at my friend Didier's home. (Th eleft horn and right horns are each double ducts horns and 4 Altec 515 are used for the whole bass horn.

I used to listen to both version and the sound of the system using the basshorn stand type is "world record level" compared to the sound that was delivered before by the 3 x JBL15GTI subs. I really think that nothing can be better in the bass register such a lrage basshorn. Really an amazing and so natural and detailed sound (details and melody in the bass register, yes!).

Best regards from Paris.

Jean-Michel Le Cléac'h

[markusA]

Ok, let's see...
For me a small horn would be something with a footprint in the 0.5m^2 region.
Although I could see myself building a floor horn like that I'm afraid my livingroom is to small.
I estimate something like 5.5x3.5m but I'm not sure since I'm moving in a month and I don't have the floor plan for the appartement.

[Jmmlc]

Hello,

Sub boxes are they have around them, for most of them, a certain "fridged" area, are often more intrusive in your living room that such floor bass horn.

Floor stands like this are often used by interior designers as aesthetic elements...
The whole area above them can be used which is nor the case with convnetional sub boxes.

Best regards from Paris,

France

[markusA]

Oh, I have no doubt about that.
My concern was rather the limiting dimensions of my room.
If I'm forced to sit too close to the horn?
It looks like you need at least a couple of meters (possibly more than that) of free space between yourself and the horn?

[Jmmlc]

Originally Posted by markusA

It looks like you need at least a couple of meters (possibly more than that) of free space between yourself and the horn?

Hello Markus,

For the last picture, the listening distance is less than 3 meters from the mouth and there is no audible artifacts due to that limited listening distance.

That's really surprising for me that here in France wher the living rroms are generally smaller than in most other countries there is many floor bass horns like this and that in countries where the mean living room is larger than in France there is none...

There is another solution more adapted to smaller living rooms which is the "stereophonic floor corner bass horn".
Here is a shematics of that one (bass horn in red color line, median wall of the horn in blue, purple = Western Electric 22A, Green = tweeter horn):

Depth from the corner 1.5 meter
Width of the mouth = 3 meters.

Best regards from Paris, France

[weltersys]

Originally Posted by markusA

Oh, I have no doubt about that.
My concern was rather the limiting dimensions of my room.
If I'm forced to sit too close to the horn?
It looks like you need at least a couple of meters (possibly more than that) of free space between yourself and the horn?

Bass horns, if used below 100 Hz or so, have little directionality, so the distance from the mouth is not important, they will simply sound louder the closer you are to them.