15" kicker l7 30hz box design help !! - Page 10 - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 4th December 2012, 02:32 PM   #91
diyAudio Member
 
Join Date: Nov 2012
Peak SPL isn't my main concern. I'm barely driving it at all in the ported box and its output is definitely decent. Like I said I'm very new to tapped horns am I correct in my thinking that a TH only had about 3 usable octaves? So a 20 hz tune is only good up to 60hz? That's not ideal but may not be horrible either. I have Polk rti1000 mains with the built in "sub" that will grab down below 60 rather well.
  Reply With Quote
Old 4th December 2012, 04:35 PM   #92
diyAudio Member
 
BP1Fanatic's Avatar
 
Join Date: Jan 2009
Location: Columbus, Ohio
Quote:
Originally Posted by blackdynamitef350 View Post
Peak SPL isn't my main concern. I'm barely driving it at all in the ported box and its output is definitely decent. Like I said I'm very new to tapped horns am I correct in my thinking that a TH only had about 3 usable octaves? So a 20 hz tune is only good up to 60hz? That's not ideal but may not be horrible either. I have Polk rti1000 mains with the built in "sub" that will grab down below 60 rather well.
That design is not a true tapped horn. It's a tapped quarter wave pipe (TQWP), straight flare and EASY build since there are no angles to deal with. A true TH has a positive flare, is more efficient, and requires a bigger box for the same 19 hz tune. If you want a wide frequency response and smaller box, then a tapped-tapered quarter wave tube (T-TQWT) is what you want. T-TQWT's have a negative flare and are less efficient than TH and TQWP's. I built a T- TQWT for my L7 because I wanted 20-80hz. I would have built a bigger enclosure if I had bigger spare pieces of wood lying around. I'm cheap! My wife & kid bought the L7 for me for xmas in 2008. I would have NEVER spent $300 on a single sub for myself.

Last edited by BP1Fanatic; 4th December 2012 at 04:41 PM.
  Reply With Quote
Old 4th December 2012, 04:43 PM   #93
diyAudio Member
 
BP1Fanatic's Avatar
 
Join Date: Jan 2009
Location: Columbus, Ohio
D@/\/\N phone made me double lost!

Last edited by BP1Fanatic; 4th December 2012 at 04:48 PM.
  Reply With Quote
Old 4th December 2012, 08:31 PM   #94
diyAudio Member
 
BP1Fanatic's Avatar
 
Join Date: Jan 2009
Location: Columbus, Ohio
How about 130dB's @ 20hz with 550w @ 8ohms (1100w @ 2ohms) in a room corner or van/suv???

16" W x 12" H to 16" W x 6" H internally for 11 feet. Double fold box with 0.75" stock = 35.25" H x 39.75" D x 17.5" W externally.
Attached Images
File Type: jpg 15L7 T-TQWT1.JPG (70.2 KB, 47 views)
File Type: jpg 15L7 T-TQWT2.JPG (36.2 KB, 43 views)
File Type: jpg 15L7 T-TQWT3.JPG (53.8 KB, 41 views)
File Type: jpg 15L7 T-TQWT4.JPG (60.8 KB, 41 views)

Last edited by BP1Fanatic; 4th December 2012 at 08:49 PM.
  Reply With Quote
Old 10th December 2012, 02:54 PM   #95
diyAudio Member
 
Join Date: Nov 2012
That sounds like a fun and simple build! May try it some day.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
kicker l7 help Chaoticdopey Subwoofers 5 10th December 2010 12:52 PM
building my 1st ported box,kicker L7 scampo77 Subwoofers 28 2nd January 2010 06:31 PM
kicker L7 rebuildable? scampo77 Car Audio 1 16th June 2009 01:51 PM
Kicker L7 skooter Car Audio 5 25th September 2008 11:36 PM
15" box design ideas?? warnsey Multi-Way 4 19th June 2008 01:01 PM


New To Site? Need Help?

All times are GMT. The time now is 10:52 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2