Infinite baffle subs. - 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 22nd September 2012, 12:22 PM   #1
diyAudio Member
 
Join Date: Aug 2011
Default Infinite baffle subs.

Hi everyone
I need some feedback on a subwoofer system I have in mind. My room is 27' long, 9' high and 11' wide. At one end I want to install two Peerless XLS 830452 drivers in the corners of a cabinet open to the 18" void under my house. They will be driven by 350 watts of class D, fed through a Tannoy active crossover. The system they will complement is a pair of Vulcans with Fostex Fe203en-s driven by AN Conquests. I thought I'd let the Vulcans go down to 120hz and cross over there. This is for music not HT. As an idiot, I humbly ask if this is a sensible plan or if there are any issues I need to be aware of?
I'm going for this approach because it seems simple and I've no idea how to design a box, the carpentry will not be a problem because it's something I can do.
Many thanks.
  Reply With Quote
Old 22nd September 2012, 01:10 PM   #2
diyAudio Member
 
Join Date: Jun 2012
"Cult of the Infinitely Baffled"Hear The Bass, Not The Box The definitive online resource for Infinite Baffle subwoofer designEstablished 1999 - Home

Mine feels awesome with a small room a Peerless 12", a Behringer DEQ 2496 and a car amp till I get more funds
  Reply With Quote
Old 23rd September 2012, 10:45 AM   #3
diyAudio Member
 
Join Date: Aug 2011
I'm mainly worried about driver excursion, any thoughts?
  Reply With Quote
Old 24th September 2012, 08:47 AM   #4
diyAudio Member
 
Join Date: Jan 2008
Quote:
Originally Posted by doubtingthomas View Post
I'm mainly worried about driver excursion, any thoughts?
Don't drive your drivers above X max and you have no worries about driver excursion.
  Reply With Quote
Old 24th September 2012, 12:17 PM   #5
diyAudio Member
 
Join Date: Jun 2012
Default Excursion!

I'm using a single Peerless 12" in my loft, I can't remember the model number, its an XXLS with Aluminum cone. My loft is obviously huge and my listening room a measly 3 x 4 m2. My DEQ 2496 has hold of a few peeks and troughs and I've been gentle with my house curve. Diana Krall Girl in the other room sounds a treat, Double bass and piano going down a treat and yet when I listen to Somafm's Drone Zone, I can feel my sofa move, but I don't hear much bass! So I'm thinking maybe thats below my hearing. However, if I watch a movie, I gotta be careful, theres a whole lot of movement going on!! Always be careful if you play movies through an IB, especially Blu Ray and Action movies. You need some good excursion, I think Ive got 15mm in one direction, you should aim for 30mm!! My previous system had 2 15" drivers with 30mm one way, driven by 450w rms amp, but thats tied up in my Divorce
Maybe just try and see, have a look to see if you can reverse any openings if it doesn't work. My 12" was in a box, but I had to have an IB, I'm bitten by it

Mike

Cheers
  Reply With Quote
Old 24th September 2012, 12:38 PM   #6
diyAudio Member
 
Join Date: Aug 2011
Thanks for the advise, I won't be using these subs for movies so I guess I'll be OK. I will post pictures of the build.
  Reply With Quote
Old 24th September 2012, 03:28 PM   #7
diyAudio Member
 
Join Date: Jun 2012
Default Construction

Hi doubtingthomas, just in case you haven't looked at the construction side of things, your Manifolds are best solid. On the Cult website, they recommend I think it was 18mm mdf with an 18mm ply skin. Solid bracing, and a solid attachment to the floor. So with that in mind, mines chip board and some scraps of wood to stitch to my rafters

But like I said, my other one is at the ex wife's house, and I'm a single parent, I have my eldest daughter who lives with me and 12 year old girls are expensive
  Reply With Quote
Old 24th September 2012, 03:53 PM   #8
diyAudio Member
 
Join Date: Jun 2012
Default some pics

My IB on a budget My source is a PC running Linux Ubuntu 12.04, I have an Asus Xonar DS soundcard, I'm using optical out, a Yamaha RX-V565 Surround Reciever, ( I'm 2 channel only- I have centre and surrounds but rarely watch movies), you can see my Beringer ECM8000 mic and a pre on the floor in one pic. The car amp is an MBQuart, I don't belive its quoted power, but its happy driving the Peerless. And yes, thats all chipboard. I also have a Radio Shack digital SPL meter and a spare hard drive with, yuck, Window$ 7 on it, wich I run REW. REW is a good bit of software for measuring things and its free. Can never get it running under Linux, hence my Windoze 7 hdd.
REW - Room EQ Wizard Home Page

Mike
Attached Images
File Type: jpg 2012-09-24 16.22.19.jpg (190.5 KB, 166 views)
File Type: jpg 2012-09-24 16.23.05.jpg (250.6 KB, 162 views)
File Type: jpg 2012-09-24 16.23.34.jpg (233.7 KB, 160 views)
File Type: jpg 2012-09-24 16.26.37.jpg (206.5 KB, 160 views)
File Type: jpg 2012-09-24 16.27.07.jpg (181.1 KB, 160 views)
  Reply With Quote
Old 24th September 2012, 04:28 PM   #9
diyAudio Member
 
Join Date: Aug 2011
Thanks, I am mindful of the need for solidity so I will over engineer everything, carpentry is not a problem for me. Am I right in thinking IB gives best sound quality?
  Reply With Quote
Old 24th September 2012, 05:07 PM   #10
diyAudio Member
 
Join Date: Jun 2012
Default I believe so

Yeah, I'd say. No box is good My first impression was, wheres the bass gone? But more like wheres the boom gone? My 2 15"s made a concrete slab outside the patio door, vibrate. The Prodigy live HD made my back brick wall vibrate against my back. The neighbours could never hear it! I think the large Sonotubes are supposed to be near IB, though I've never heard one, also there's a Tapped horn, Tapped Horn Experiments, never played fully with one but I had a Linkwitz Transform on a 12" sealed box, that was beastly , but no, give me an IB any day
Mike
  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
Infinite baffle Sub? Is it for me? JapanDave Subwoofers 23 24th September 2012 02:07 AM
Open Baffle vs Infinite Baffle. DrDyna Multi-Way 33 12th July 2012 05:31 PM
Infinite subs T edward Car Audio 0 15th October 2006 03:27 PM
Help with infinite baffle. Andrew S- Multi-Way 2 8th February 2006 03:53 PM
help w/ infinite baffle sub HIPCHECK Subwoofers 5 16th December 2005 12:19 AM


New To Site? Need Help?

All times are GMT. The time now is 10:07 PM.


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