Enclosure design for pair of JBL 2226H

Likeitloud · 15th January 2010, 03:13 PM

Hey guys, new member here. I can't believe I have never been here before, for how long I have been an audio nut!

Anyway, I am building a high output sub for a sort of unique situation for a customer. He is going to be using it in a very loud audio room in his home, plus he is wants to play along with it, when him and his band buddies get together. Note- he will not be plugging an instrument into it like a bass guitar, just having it playing the song they are playing at the time.

He is a JBL fanatic, so I cannot use anything else, so the 2226H seems to be the choice. It will be 2 of these drivers in one cabinet, ported, not wanting to tune too low, as this will be used for strictly music, primarily kick drum (rock) type bass, and loud. Power will be Crown, approx 800-1200 rms per driver.

Any assistance with the airspace and tuning would be greatly appreciated.
Thanks

djk · 16th January 2010, 03:40 AM

JBL 4508 cabinet, 8 cu ft tuned to 40hz.

Don Bunce · 16th January 2010, 07:35 AM

www.jblpro.com/pub/manuals/enclgde.pdf

Use #10

Luke · 16th January 2010, 08:15 AM

shouldnt you expect a lower frequency response than 40Hz for 2226H?

ds23man · 16th January 2010, 09:49 AM

The 2226 is not the way to go for a subwoofer, wrong Fs. It is a PA speaker!

Regards Gerhard

pinkmouse · 16th January 2010, 09:57 AM

I'd build two 4 cubic foot boxes, rather than one dual 8 footer. Bit neater.

letsbangout · 16th January 2010, 03:39 PM

You might not want that much power per-driver. The power compression kicks in around 350 or 400w. I'd be looking at 800-1000w for the entire pair.

Defo · 05:33 PM

Quote:

Originally Posted by ds23man

The 2226 is not the way to go for a subwoofer, wrong Fs. It is a PA speaker!

Regards Gerhard

Pfft, Im using two 2226H in a 100L closed enclosure with a low shelf eq filter, and have good output down to 20hz...

djk · 16th January 2010, 11:45 PM

"Use #10 "

Gee, that's 8 cu ft tuned to 40hz.

Lower tunings are possible, but will handle very little power (remember, cone motion increases at 4x for each octave of bass extension).

This is what 8 cu ft tuned to 40hz gets you:

http://www.jblpro.com/catalog/suppor...pe=3&docid=623

badman · 17th January 2010, 12:45 AM

2242 or 2235 would be better choices. 2226 is a midbass driver. An excellent midbass driver but definitely not a sub except in BIG boxes in a prosound sense

16th January 2010, 03:40 AM	#2
djk diyAudio Member Join Date: Feb 2001 Location: USA	JBL 4508 cabinet, 8 cu ft tuned to 40hz. __________________ Candidates for the Darwin Award should not read this author.

16th January 2010, 08:15 AM	#4
Luke diyAudio Member Join Date: Sep 2001 Location: Wellington NZ	shouldnt you expect a lower frequency response than 40Hz for 2226H? __________________ If you give a man a fish he will eat for a day. But if you teach a man to fish he will buy an ugly hat. And if you talk about fish to a starving man then you are a consultant. Dilbert

16th January 2010, 09:57 AM	#6
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	I'd build two 4 cubic foot boxes, rather than one dual 8 footer. Bit neater. __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

16th January 2010, 11:45 PM	#9
djk diyAudio Member Join Date: Feb 2001 Location: USA	"Use #10 " Gee, that's 8 cu ft tuned to 40hz. Lower tunings are possible, but will handle very little power (remember, cone motion increases at 4x for each octave of bass extension). This is what 8 cu ft tuned to 40hz gets you: http://www.jblpro.com/catalog/suppor...pe=3&docid=623 __________________ Candidates for the Darwin Award should not read this author.

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15th January 2010, 03:13 PM	#1
Likeitloud diyAudio Member Join Date: Jan 2010	Enclosure design for pair of JBL 2226H Hey guys, new member here. I can't believe I have never been here before, for how long I have been an audio nut! Anyway, I am building a high output sub for a sort of unique situation for a customer. He is going to be using it in a very loud audio room in his home, plus he is wants to play along with it, when him and his band buddies get together. Note- he will not be plugging an instrument into it like a bass guitar, just having it playing the song they are playing at the time. He is a JBL fanatic, so I cannot use anything else, so the 2226H seems to be the choice. It will be 2 of these drivers in one cabinet, ported, not wanting to tune too low, as this will be used for strictly music, primarily kick drum (rock) type bass, and loud. Power will be Crown, approx 800-1200 rms per driver. Any assistance with the airspace and tuning would be greatly appreciated. Thanks

16th January 2010, 07:35 AM	#3
Don Bunce diyAudio Member Join Date: Mar 2007	www.jblpro.com/pub/manuals/enclgde.pdf Use #10

16th January 2010, 09:49 AM	#5
ds23man diyAudio Member Join Date: Oct 2006	The 2226 is not the way to go for a subwoofer, wrong Fs. It is a PA speaker! Regards Gerhard

16th January 2010, 03:39 PM	#7
letsbangout diyAudio Member Join Date: Sep 2008	You might not want that much power per-driver. The power compression kicks in around 350 or 400w. I'd be looking at 800-1000w for the entire pair.

17th January 2010, 12:45 AM	#10
badman Custom Title diyAudio Member Join Date: Sep 2003 Location: Sunny Tustin, SoCal	2242 or 2235 would be better choices. 2226 is a midbass driver. An excellent midbass driver but definitely not a sub except in BIG boxes in a prosound sense __________________ I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!

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