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-   -   The elusive Horn...can I have it all? (http://www.diyaudio.com/forums/full-range/109451-elusive-horn-can-i-have-all.html)

Fast1one 3rd October 2007 07:46 PM

The elusive Horn...can I have it all?
 
So I have built nearly every possible enclosure, or have atleast heard a good example of it.... Except...

Horns, specifically BLHs. I'll cut straight to the chase. I don't want to deal with a sub anymore, but I want most of the low frequency response to be in tact (IE as low as I can go). I was looking at the pioneer B20, or another 8 inch FR driver in that price range. Doesn't matter how much wood is used so long as I can use 2x4 feet project sheets as I don't have a truck right now. Complexity isn't too much of an issue either so long as I can use a table saw to do all the cuts.

What I am looking for is full range response from 20(30)HZ-20K. A helper tweeter will be used to fill in the upper octaves. I have about 15-20 watts to work with. Also, currently my room is too small to support anything under rouughly 30hz, but I want a response lower than that for headroom when I move into a larger space...

Is it possible? If you have any other suggestions for drivers, Im trying to keep the costs of drivers ~60 plus the cost of tweeters, so anything with an efficiency of 90db or more I can work with...

Thanks for any help or responses :)

-Serg

Scottmoose 3rd October 2007 08:13 PM

A BIB pipe-horn with an 8in driver like the B20 should do the trick. Small is not a word that immediately springs to mind with this cabinet though.

Fast1one 3rd October 2007 08:17 PM

Quote:

Originally posted by Scottmoose
A BIB pipe-horn with an 8in driver like the B20 should do the trick. Small is not a word that immediately springs to mind with this cabinet though.
That was my first option, but the problem (which I forgot to mention) is that I usually don't have corners to work with, not to mention I want to keep it relatively short. Which is why the Suzy chang caught my interest.

One alternative I thought of is building a BIB with two folds instead of one and either floor loading it or firing it towards the wall...

GM 4th October 2007 12:09 AM

Re: The elusive Horn...can I have it all?
 
Quote:

Originally posted by Fast1one

Is it possible?

Considering all your qualifiers and no corners, I don't see how.

Fast1one 4th October 2007 02:59 AM

Would folding BIBs with two folds give a noticeable drop in performance? I may just do that...It doesn't have to be small just short :D

Edit: I don't have to have response that low, because I know the real world is not perfect, just want to get as close as possible, maybe when I move in to my house I will have corners :)

GM 4th October 2007 03:27 AM

Hard to say, it just depends on how much, if any, extra damping is required.

Fast1one 4th October 2007 03:30 AM

Im thinking if just building the Suzy Chang for the B20, and adding stereo bass later if i really want to....Its so easy to build a chimp can do it, of course I always wanted to build a BLH :) But we can't always get what we want...

planet10 4th October 2007 04:18 AM

Quote:

Originally posted by Fast1one
Suzy Chang for the B20,
Suzy Chang is for FE107 (FE103). Half Chang is for B20.

dave

Scottmoose 4th October 2007 09:57 AM

Quote:

Originally posted by Fast1one
Its so easy to build a chimp can do it, of course I always wanted to build a BLH :) But we can't always get what we want...
Oook. Gibber. Scratch. etc. :D

In that case, I'd forget trying to go for 30Hz or lower. Go for 40Hz (which is as low as acoustic instruments, pipe-organs aside, go), and then add a couple of subs at a later date. If the box gets a little below 40 as is, bonus.

Circlomanen 4th October 2007 10:49 AM

The Decware Imperial with a B&C 15CX40???

Big BLH/BVR

15 Inch coaxial

If you will use a tweeter with a Fostex, you can just as well have the tweeter i the center of the bass-cone.


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