Peerless 12" XLS sealed cabinets - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

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 19th June 2004, 08:25 AM   #1
tktran is offline tktran  Australia
Account Disabled
 
Join Date: Mar 2003
Location: Perth
Default Peerless 12" XLS sealed cabinets

Has anyone struck a good cabinet design for the 830500? I've found a few of recommendations for use with a passive radiator, but few in a sealed box.

I simulated in winISD but got an F3 of about 70Hz...


This is to be used for music and HT, with compact (5.5") 2 way floorstanders (or bookshelves)) so articulate bass is important. The woofer in a modest sized box (<2 cubic feet)

I've never heard this woofer, would prefer not to go with the PR because I am wary of unpredictable results (eg. rear riring PR up close against wall?).

I understand there may be other woofers better suited for small sealed boxes but they tend to be unavailable or overpriced in Australia, and would prefer to use what is locally available at reasonable prices.

Power requirements not a problem with expected 300-500W RMS to be available (own design using TI class D)
  Reply With Quote
Old 19th June 2004, 08:51 AM   #2
diyAudio Member
 
Join Date: Jul 2003
Location: Silicon Valley
You just haven't googled enough. An XLS in a sealed box requires equalization. Here's the most famous one: http://www.linkwitzlab.com/thor-intro.htm
__________________
Davy Jones
  Reply With Quote
Old 19th June 2004, 09:50 PM   #3
Therac is offline Therac  Denmark
diyAudio Member
 
Join Date: May 2003
Location: Denmark
D-S-T (Danish Sound Technology) has some application notes for the 830500 in a sealed box.

www.d-s-t.com then select "engineering" at the left...

Hope that you can use it...

-Therac
  Reply With Quote
Old 19th June 2004, 11:38 PM   #4
angel is offline angel  Norway
diyAudio Member
 
Join Date: Oct 2003
Location: Norway
Actually, you want a sealed box with a Qtc of 0.3-0.6. You're aiming for a -10dB point of about 30Hz to match room boundary gain.

A quick sim in WinISD using the 10" and 12" XLS-CAR driver gives good results around 69 and 58,5 litres respectively (Q 0.5).

If you want entirely optimal results, you'll still need a Linkwitz transform to move the poles to match the room boundary poles, but that requires measuring your room etc.

For starters, I'd just go with an enclosure with a Qtc of 0.5, to put you in the ballpark. You can add electronic compensation circuits later on.
  Reply With Quote
Old 20th June 2004, 03:21 AM   #5
tktran is offline tktran  Australia
Account Disabled
 
Join Date: Mar 2003
Location: Perth
I've read the Peerless engineering papers.

In the design or vented and passive radiator boxes, excursions limits at low frequencies are considered, and the design aims to makes use of minimising the risk of over-excursion by way of port or PR tuning. Also it is highly recommended to make use of subsonic (<20Hz) filters.

However there are no such warning or design targets to prevent exceeding the excursion limits in the 30L sealed box.

Will I still need to consider excursion limits?
  Reply With Quote
Old 20th June 2004, 09:03 AM   #6
Nisbeth is offline Nisbeth  Denmark
diyAudio Member
 
Nisbeth's Avatar
 
Join Date: Jan 2001
Location: Denmark
Try modelling your idea in UniBox (http://home20.inet.tele.dk/kou/ubmodel.html)
This should give you an idea about the driver behavior in closed, reflex and PR-systems


/U.
  Reply With Quote
Old 20th June 2004, 12:07 PM   #7
diyAudio Member
 
5th element's Avatar
 
Join Date: Oct 2002
Location: England
Ive done an XLS10 in a sealed box with EQ and it sounds great and I have not bothered with any kind of subsonic filter. Why would I need one? There aint much noise in music below 20 anyway, if any. HT though thats another matter. But if you were going to have a filter at about 20hz youd want it to be really steep.
__________________
What the hell are you screamin' for? Every five minutes there's a bomb or somethin'! I'm leavin! bzzzz!
  Reply With Quote
Old 20th June 2004, 11:41 PM   #8
diyAudio Member
 
Join Date: Jul 2003
Location: Silicon Valley
Quote:
Originally posted by 5th element
Ive done an XLS10 in a sealed box with EQ and it sounds great and I have not bothered with any kind of subsonic filter. Why would I need one? There aint much noise in music below 20 anyway, if any. HT though thats another matter. But if you were going to have a filter at about 20hz youd want it to be really steep.
How did you EQ it? Some (most?) plate amps use a peaking highpass filter for EQ, so you automatically get a subsonic filter whether you want one or not.
__________________
Davy Jones
  Reply With Quote
Old 21st June 2004, 06:15 AM   #9
diyAudio Member
 
Join Date: Mar 2002
Location: Ca
Send a message via ICQ to THOR Send a message via Yahoo to THOR
Default this is what you want

and this guy is in oz.
http://members.ozemail.com.au/~joeras/sub_index.htm
this is one of the best!
__________________
If it aint Baroque , fix it !
  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
peerless xxls sealed -vs- peerless xls with passive radiator Naudio Subwoofers 8 23rd March 2008 10:00 PM
Peerless XLS sealed bhg41088 Subwoofers 2 11th October 2004 12:57 AM
Peerless CSX 10" Sealed bass modules LageB Multi-Way 13 23rd November 2003 05:45 AM
good sealed box size for a 10&quot; Peerless XLS sub peerless Multi-Way 1 1st August 2003 10:01 PM
Peerless SLS 315 /Sealed Sub LageB Multi-Way 0 24th February 2003 10:51 AM


New To Site? Need Help?

All times are GMT. The time now is 03:23 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