building a folding horn for the time

offroadbum · 15th September 2004, 10:49 PM

where to start. i`ve got some 8" speakers laying around i can use.
where can i find some plans or calculator to figure the box size.

Josephjcole · 15th September 2004, 11:57 PM

More info than this is needed to give any kind of intellegent response... are you looking to make a rear-loaded horn for a fullrange driver, or are you trying to build a bass horn with the 8"er? What is the driver you have?
Joe
horn link

horn link#2

offroadbum · 16th September 2004, 12:18 AM

i want to build a bass horn. the driver i have is a leftover car sub
by mtx.i do have the specs on it
i just heard a Klipschorn some 20yrs ago and it just amazed me and i need a new project

dwk123 · 16th September 2004, 12:30 AM

How patient are you?

Bill Fitzmaurice who posts here does amazing folded horns. On his site you can see the Tuba 24 - a 24" cube sub designed for PA use. He'll be publishing the Tuba 18 in AudioXPress in a couple months. It'll be an 18" cube designed for corner placement and tailored more for home use. It uses a cheap MCM 8", so even if it doesn't work with your current driver it's only $35 or so for the proper one.

I'm looking forward to seeing the plans, and am seriously considering trying one or two depending on the complexity.

http://www.billfitzmaurice.com/

BillFitzmaurice · 16th September 2004, 01:05 PM

While you're waiting for Tuba 18 a slightly larger box design, AutoTuba, is already available. Just about any halfway decent 8 will work in it, though it works best with the MCM 55-2421 driver or another with similar specs.

dwk123 · 16th September 2004, 07:01 PM

Hmmm, I'd actually thought the Auto was smaller than the 18 - pictures can be deceiving.
Do you have any plots of how the Auto looks corner-loaded without the cabin gain to help out? Is it pretty similar to the 18 response you've posted at AA?

BillFitzmaurice · 16th September 2004, 07:07 PM

The Tuba 18 is 18x18x19 inches, the AutoTuba 14x14x32. Indoors corner loaded the AutoTuba runs about the same SPL but 5Hz lower than the Tuba 18. The same goes for quarter space.

dwk123 · 16th September 2004, 09:26 PM

Hmmmm, those dimensions *might* even work better in my room than the cube would.....

thanks for the info - might just have to pick up the Auto plans to see what i'm up against.

15th September 2004, 10:49 PM	#1
offroadbum diyAudio Member Join Date: Jan 2004 Location: tennessee	building a folding horn for the time where to start. i`ve got some 8" speakers laying around i can use. where can i find some plans or calculator to figure the box size. __________________ Lost in wonderland.......... now where that rabbit go??

16th September 2004, 12:18 AM	#3
offroadbum diyAudio Member Join Date: Jan 2004 Location: tennessee	i want to build a bass horn. the driver i have is a leftover car sub by mtx.i do have the specs on it i just heard a Klipschorn some 20yrs ago and it just amazed me and i need a new project __________________ Lost in wonderland.......... now where that rabbit go??

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15th September 2004, 11:57 PM	#2
Josephjcole diyAudio Member Join Date: Jun 2004 Location: Wisconsin	More info than this is needed to give any kind of intellegent response... are you looking to make a rear-loaded horn for a fullrange driver, or are you trying to build a bass horn with the 8"er? What is the driver you have? Joe horn link horn link#2

16th September 2004, 12:30 AM	#4
dwk123 diyAudio Member Join Date: Feb 2002	How patient are you? Bill Fitzmaurice who posts here does amazing folded horns. On his site you can see the Tuba 24 - a 24" cube sub designed for PA use. He'll be publishing the Tuba 18 in AudioXPress in a couple months. It'll be an 18" cube designed for corner placement and tailored more for home use. It uses a cheap MCM 8", so even if it doesn't work with your current driver it's only $35 or so for the proper one. I'm looking forward to seeing the plans, and am seriously considering trying one or two depending on the complexity. http://www.billfitzmaurice.com/

16th September 2004, 01:05 PM	#5
BillFitzmaurice Banned Join Date: May 2004 Location: New Hampshire	While you're waiting for Tuba 18 a slightly larger box design, AutoTuba, is already available. Just about any halfway decent 8 will work in it, though it works best with the MCM 55-2421 driver or another with similar specs.

16th September 2004, 07:01 PM	#6
dwk123 diyAudio Member Join Date: Feb 2002	Hmmm, I'd actually thought the Auto was smaller than the 18 - pictures can be deceiving. Do you have any plots of how the Auto looks corner-loaded without the cabin gain to help out? Is it pretty similar to the 18 response you've posted at AA?

16th September 2004, 07:07 PM	#7
BillFitzmaurice Banned Join Date: May 2004 Location: New Hampshire	The Tuba 18 is 18x18x19 inches, the AutoTuba 14x14x32. Indoors corner loaded the AutoTuba runs about the same SPL but 5Hz lower than the Tuba 18. The same goes for quarter space.

16th September 2004, 09:26 PM	#8
dwk123 diyAudio Member Join Date: Feb 2002	Hmmmm, those dimensions might even work better in my room than the cube would..... thanks for the info - might just have to pick up the Auto plans to see what i'm up against.