help with my 19 cubic foot box - 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 11th July 2013, 10:53 AM   #1
diyAudio Member
 
Join Date: Jul 2013
Default help with my 19 cubic foot box

i am making a sub woofer box for my next project and i am using a
"dayton 18 inch classic subwoofer"
(Dayton Audio DCS450-4 18" Classic Subwoofer 4 Ohm 295-475)

i have used bass box pro to calculate the best box size for a extended frequency down to 21hz 118 decibels loud

but what i need to know is if it will work?

i have attached the bass box calculations (please rename the ending from ".asc" to ".bb6" so you can open it

cheers for any help
Attached Files
File Type: asc 18 inch dayton classic.asc (3.3 KB, 15 views)
  Reply With Quote
Old 12th July 2013, 06:26 AM   #2
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Don't have BB6, but just doing a quick T/S max flat calculation using published specs yields a ~16.4 ft^3/21.5 Hz alignment, so wondering why the need for 19 ft^3 if you're not going to tune it lower.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 12th July 2013, 07:09 AM   #3
diyAudio Member
 
norman bates's Avatar
 
Join Date: Nov 2003
Location: iowa
yup, 20hz tuning is nice, but jeez, 16ft3 is a big box for a single 18, but that's the ideal 4th order.

Just because a driver can do 400 watts rms doesn't mean it is 6db louder than 100 watts.

Norman
  Reply With Quote
Old 12th July 2013, 03:37 PM   #4
diyAudio Member
 
Join Date: Feb 2004
I would pick a different woofer that goes low in a smaller box.
  Reply With Quote
Old 12th July 2013, 05:35 PM   #5
OscarS is offline OscarS  United States
diyAudio Member
 
Join Date: Jan 2011
It will work as in, you'll get the frequency response out of it, but I'd bet that it won't handle all that much power in the 30-50hz range where most bass lives. Post a screen shot of the excursion graph....
  Reply With Quote
Old 12th July 2013, 08:33 PM   #6
diyAudio Member
 
Inductor's Avatar
 
Join Date: Feb 2006
Location: Cascais
Quote:
Originally Posted by OscarS View Post
It will work as in, you'll get the frequency response out of it, but I'd bet that it won't handle all that much power in the 30-50hz range where most bass lives. Post a screen shot of the excursion graph....
Xmech will be up from >15Hz by tuning to high?, up from 20Hz. I would double check, before final design or use some effective protection for LF, at around max. excursion/power 275/300 W@4 Ohms.
__________________
NEXT-proaudio Portugal
  Reply With Quote
Old 12th July 2013, 08:46 PM   #7
OscarS is offline OscarS  United States
diyAudio Member
 
Join Date: Jan 2011
Quote:
Originally Posted by Inductor View Post
Xmech will be up from >15Hz by tuning to high?, up from 20Hz. I would double check, before final design or use some effective protection for LF, at around max. excursion/power 275/300 W@4 Ohms.
I don't understand what you mean. "Xmech" is usually understood to be the maximum excursion before physical damage, is not a value that changes....so I'm confused at what you're getting at.....
  Reply With Quote
Old 13th July 2013, 07:48 PM   #8
Scott L is offline Scott L  United States
diyAudio Member
 
Join Date: Dec 2008
Location: Knoxville, TN
Default Nineteen cubic feet !!

Too bad you already bought the 18 inch "classic".

With an enclosure that HUGE, you could have put TWO of the 18inch
reference series RSS460HO-4

AND... do a reaction-cancelling mounting technique, that would be a SUB !!

p.s. I'll let the math guys do the alignment, but a quick glance at the specs tells me 19 ft^3 is still a tad bit too big even for a PAIR of the RSS 18's !

As soon as PE released this monster driver, I wanted it, even though I don't really need it !!
  Reply With Quote
Old 14th July 2013, 03:24 PM   #9
diyAudio Member
 
Inductor's Avatar
 
Join Date: Feb 2006
Location: Cascais
Quote:
Originally Posted by OscarS View Post
I don't understand what you mean. "Xmech" is usually understood to be the maximum excursion before physical damage, is not a value that changes....so I'm confused at what you're getting at.....
Xmech (what ever it is) is going to be reached with a "bad" alignment. In this case with frequencies 15Hz and up? with alignments superior to 20Hz tuning. (lingo)
__________________
NEXT-proaudio Portugal
  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
Driver Reccomendation for 5 cubic Foot Enclosure. Home theater use permo Subwoofers 17 21st February 2013 12:21 PM
Is this driver a good value candidate for simple 100W 3 to 4 cubic foot sealed sub? peace brainerd Subwoofers 25 17th September 2011 07:00 PM
Decent 18 inch woofer for a 7.5~8 cubic foot bass reflex enclosure? Upstate NY low life Subwoofers 9 9th July 2011 08:35 PM
Calculating box dimensions from cubic volume retroman Multi-Way 6 11th July 2009 04:06 AM
fostex 206 in 2.5 cubic foot box JimW Full Range 6 5th January 2005 05:50 PM


New To Site? Need Help?

All times are GMT. The time now is 11:46 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