Sealed sub: cabinet size?? - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 9th August 2006, 02:05 PM   #1
Klimon is offline Klimon  Belgium
diyAudio Member
Join Date: Apr 2005
Location: Leuven
Default Sealed sub: cabinet size??


I'm one of those cheap guys that does things as buying two dirt-cheap (discount car subdrivers, than hassles you guys with questions on how to make them work in a home environment

The only specs I have are: 91db/w, 4ohms, 21hz-800hz, max. 600watts, good build quality with plastic membrane and inverted dustcaps. I did a first test with a 60 liter (about 1,5 cubic feet) closed cabinet, didn't go low enough... Now building a 120 liter test cab which, when fully stuffed should give about 160liter max.

The way I see it I should be able to make it work when the cab is sufficiently large. I'm planning to power them with class T-amps, bridged, one for each sub. Biamping with crossover point around 80-100hz, simple cap as highpass, simple coil as lowpass unless this messes up the low-midrange, maybe an active filter with 4th order filter will be better on the long run.

Just telling my story here in the hope someone has any suggestions,


  Reply With Quote
Old 9th August 2006, 03:15 PM   #2
GM is offline GM  United States
diyAudio Member
GM's Avatar
Join Date: Jun 2003
Location: Chamblee, Ga.

True, unfortunately, if it turns out to be designed for an I.B. (trunk) app, then it will require a huge cab for decent SQ/extension.

Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 9th August 2006, 03:42 PM   #3
Did it Himself
diyAudio Member
richie00boy's Avatar
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Default Re: Sealed sub: cabinet size??

Originally posted by Klimon
I'm one of those cheap guys that does things as buying two dirt-cheap (discount car subdrivers, ... how to make them work in a home environment
I used to do things like that until I realised it was a waste of time and money and effort. I suppose I learnt a couple of things though.

See how you get on with the larger box. If it's not so great, next time do some research and modelling before and buy right parts of better quality and do the job once.

It might be worth measuring the Thiele-Small parameters yourself just so you can see how bad the drivers are and seeing what effects the parameters have.
__________________ my website for UK diy audio people - designs, PCBs, modules and more.
  Reply With Quote
Old 10th August 2006, 12:30 AM   #4
diyAudio Member
Join Date: Nov 2004
Location: sk
Send a message via AIM to ocool_15 Send a message via Yahoo to ocool_15
you didn't say what diameter they are. You will likely need to use some sort of active equalization to get a decent low end. Since its a car sub your Fs is likely to be too high, especially if its intended for a ported box. Its quite efficient which from t/s limitations is indicate it may not be as well suited to a home subwoofer application. You really need to measure the specs to get a better idea.
  Reply With Quote
Old 10th August 2006, 11:26 AM   #5
Klimon is offline Klimon  Belgium
diyAudio Member
Join Date: Apr 2005
Location: Leuven
I'll follow your recommendations and try to measure the TS-parameters, also because a ported box seems to have big advantages over a sealed one apart from the need for a precise design. The woofers diameter is 12" and the magnet weight is 50oz; I've seen other car subs with 100+ oz magnets so this might be a good sign: ib car subs tend to have a much larger magnet so mine might be made for ported / sealed use after all. Finally, I seriously doubt their 91db/w efficiency...

Thanks a lot for your input; I'll put this thread to rest untill the parameters are measured

  Reply With Quote


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
DAYTON RSS315HF-4 12" sealed box size? Daveis Subwoofers 2 17th August 2007 12:33 AM
Sealed box size for Vifa M26wr-0908 .? JandG Subwoofers 5 12th November 2006 03:41 PM
what size sealed or ported box can this woofer use ? zuki Multi-Way 2 23rd November 2004 02:20 AM
Sealed cabinet speakers Zepper Multi-Way 3 21st May 2004 11:34 AM
good sealed box size for a 10" Peerless XLS sub peerless Multi-Way 1 1st August 2003 09:01 PM

New To Site? Need Help?

All times are GMT. The time now is 07:06 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2