The elusive Horn...can I have it all?

Fast1one · 3rd October 2007, 07:46 PM

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

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

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.

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.

3rd October 2007, 07:46 PM	#1
Fast1one diyAudio Member Join Date: Sep 2006	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

4th October 2007, 03:27 AM	#6
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Hard to say, it just depends on how much, if any, extra damping is required. __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

4th October 2007, 10:49 AM	#10
Circlomanen diyAudio Member Join Date: Sep 2004 Location: Göteborg	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. __________________ We live in a horizontal world, why use vertical topologies???

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3rd October 2007, 08:13 PM	#2
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	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.

4th October 2007, 02:59 AM	#5
Fast1one diyAudio Member Join Date: Sep 2006	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 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

4th October 2007, 03:30 AM	#7
Fast1one diyAudio Member Join Date: Sep 2006	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...

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