Concept, Beolab 11 style isobaric sub using Ikea Blanda metal bowls. - Page 2 - 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 26th June 2012, 09:35 AM   #11
djk is offline djk
diyAudio Member
 
djk's Avatar
 
Join Date: Feb 2001
Location: USA
"(cancelling 2nd order without doing anything about 3rd order creates a non-monotonic series of harmonics). "

Then you must not like servo subs either.

I've listened to both, and prefer not to have the 'mud'.
__________________
Candidates for the Darwin Award should not read this author.

Last edited by djk; 26th June 2012 at 09:38 AM.
  Reply With Quote
Old 26th June 2012, 09:44 AM   #12
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Never heard a servo sub.

If you use good drivers, push-pull gains you little (ref Llambda Nick), and reduces the effectiveness of force cancelation. So i use good woofers & choose to maximize force cancellation.

The only mud is out in the yard after it rains.

I do have a pair of pushpush-pushpull box in the works, my thinking being that to do push-push without sacrificing force cancellation one needs to use 4 woofers/box.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 26th June 2012, 01:18 PM   #13
diyAudio Member
 
Join Date: Sep 2008
Location: Bristol
Thanks for the images.

So is the consensus push-push will be best?

Have been eying the Peerless XLS10 on ebay 69, half the cost of the Scan-Speak. Will they work, will they be good? Any better recommendations?

Peerless XLS10 Subwoofer P830452 Loudspeaker - Speaker. | eBay

Here are the specs:


Specifications

Nominal Impedance (Ohms)
Zd
4
Min Impedance
Zmin
5.2
DC Resistance (Ohms)
Re
3.6
Voice Coil Inductance (mH)
Le
0.99
Resonant Frequency (Hz)
Fs
22
Mechanical Q Factor
Qms
3.86
Electrical Q Factor
Qes
0.24
Total Q
Qts
0.23
Moving Mass (g)
Mms
136.6

Suspension Compliance (mm/N)
Cms
390um/M
Effective Cone Diameter (cm)
D
21.1
Effective Piston are (cm2)
Sd
349.7
Equivalent Volume (Ltrs)
Vas
66.90
Force Factor
Bl
16.75
Reference Voltage Sensitivity
dB
86.6
Weight of Magnet (kg)
2.42
  Reply With Quote
Old 26th June 2012, 01:40 PM   #14
Xoc1 is offline Xoc1  United Kingdom
diyAudio Member
 
Xoc1's Avatar
 
Join Date: Nov 2008
Location: Devon UK
A 36cm Hemisphere is approx 12 Litres.
Insert a 12m baffle with cutout and you down to 11.5 Litres! Subtract the driver volume from that again then calculate the bass response for a sealed cab. Methinks it might roll off quite high for a bass cab.....
  Reply With Quote
Old 26th June 2012, 01:54 PM   #15
djk is offline djk
diyAudio Member
 
djk's Avatar
 
Join Date: Feb 2001
Location: USA
Looks like a pair of 6-1/2s are in order, and boost below 50hz.
__________________
Candidates for the Darwin Award should not read this author.
  Reply With Quote
Old 26th June 2012, 05:52 PM   #16
diyAudio Member
 
Join Date: Sep 2008
Location: Bristol
@Xoc1 any way to help this along? The two cabinets will be joined i reckon a total of 19L.

Could run x4 like Planet 10's first picture the gap containing 2 magnets sticking out?

Would always rather have less better quality drivers than more cheap ones.

@djk, any recommendations for a 6-1/2" sub woofer?

I hear lots of people talking about Tang Band, just seem really hard to find in the UK.

Tons of drivers on eBay, hard to filter out the less than ideal stuff.
  Reply With Quote
Old 26th June 2012, 07:46 PM   #17
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
These'll do the job.

W6-1139SIF - TB speakers 6 inch paper cone subwoofer - Europe Audio

I use mine (earlier Neodymium version, basically the same) in a 11L ported box each and think they're brilliant.
They'll go lower, louder, in tapped horns, but the THs I used were many times that cabinet volume.

Watching with interest

Chris
  Reply With Quote
Old 28th June 2012, 09:40 AM   #18
diyAudio Member
 
Join Date: Sep 2008
Location: Bristol
50 Uk $45 Us. Grrr

Look good though, would they work well in a sealed 11L enclosure?
  Reply With Quote
Old 28th June 2012, 01:29 PM   #19
bjorno is offline bjorno  Sweden
diyAudio Member
 
Join Date: Mar 2005
Location: Jacobsmountain
Send a message via MSN to bjorno
Quote:
Originally Posted by Studio Au View Post
50 Uk $45 Us. Grrr

Look good though, would they work well in a sealed 11L enclosure?
Hi,

You may find answers here:

b
  Reply With Quote
Old 28th June 2012, 01:32 PM   #20
diyAudio Member
 
Join Date: Sep 2008
Location: Bristol
Really wish I knew what I was looking at?

Doesn't seem like a very smooth response in any of the graphs.
  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
B&O Beolab 11 - how does it work? natumbri Subwoofers 12 20th August 2013 01:37 PM
Beolab 5 clones!!!!! legendaryfrog Multi-Way 72 16th April 2013 01:31 AM
WTB: 4x Ikea BLANDA bowls, 8" or 12" Spasticteapot Swap Meet 7 11th March 2010 06:46 AM
Ikea Bowls question joe58 Full Range 2 27th February 2010 06:11 PM


New To Site? Need Help?

All times are GMT. The time now is 07:59 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