Peerless india SKO204 8" woofer - 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 14th January 2013, 06:04 AM   #1
diyAudio Member
 
Join Date: Feb 2010
Default Peerless india SKO204 8" woofer

Hi

I am planning some to build 4 subwoofers for my living room mostly for music to help my mission bookshelf spakers with the low frequensies.

My room is 45m2 I dont play very loud.

Willys hifi on Ebay Peerless SKO204 8 inch hifi bass woofers speakers | eBay

Would 4 of these cheap drivers work as sub woofers?

In a vented 65liters box per driver they will go pretty low.

Is it a waist of money and if so why.

Regards Fredrik
  Reply With Quote
Old 14th January 2013, 06:24 AM   #2
diyAudio Member
 
picowallspeaker's Avatar
 
Join Date: Apr 2007
Hmmm...of course those speakers have the diameter to display
much volume of air, specially if there are as many as 4.
BUT
major thing to care about a sub is how those speakers manage the heat?
It's just because there's the intention to use a sub, that someone must
ask : how much power? for how long ? If there's a limited number of peaks,
most speakers can cope with it and may take their time to settle the
temperature, otherwise if they cannot cope with it - extreme usage to the limit-
they'll distort and presumably burn ( but it's useful to detect distortion before burn happens ! )their voice coil . Also the material of the voice coil is important. So the voice coile diameter , which somehow is indicative of good thermal behavior .
SO
Strictly talking about the Peerless product, which I don't know precisely but
it is similar to other speakers with big membrane and little magnet, it will
likely reproduce low bass but for very limited time, as it is not projected
to do sub duties .
  Reply With Quote
Old 14th January 2013, 09:33 AM   #3
diyAudio Member
 
Join Date: Feb 2011
Location: Colorado, USA
They look like decent drivers, but I would look for a 12" with a lower Fs. 40 is high for a sub. No Xmax figure is listed.
  Reply With Quote
Old 14th January 2013, 10:26 AM   #4
diyAudio Member
 
Join Date: Feb 2010
Default X-MAX

Is 5,5mm linear
  Reply With Quote
Old 14th January 2013, 01:51 PM   #5
bjorno is offline bjorno  Sweden
diyAudio Member
 
Join Date: Mar 2005
Location: Jacobsmountain
Send a message via MSN to bjorno
Hi,

Great driver! IMO:Enough loud for a smaller room when focusing music use.

b
Attached Images
File Type: jpg Peerless-SK0204.JPG (561.1 KB, 253 views)
File Type: jpg Peerless-SK0204_BR_OD_ML-TL.JPG (389.4 KB, 232 views)
  Reply With Quote
Old 14th January 2013, 03:03 PM   #6
sreten is online now sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

Great value driver, I've recommended the 2 way kit before for
a a pair of large 2-ways, but 4 2.3 cuft internal cabinets for
subwoofery with 8"ers isn't what they are good at.

With 40Hz Fs you ain't going to get very low for all that
cabinet volume, they will however be very efficient, why
the large 2-way is good for valve amplifiers and the like.

Unfortunately good cheap drivers to go low properly are
very hard to find and 45m squared seems a pretty big room,
which will take some driving, though your long main mode
should be pretty low. meaning low bass is on the cards.

This is an excellent driver :
Eminence LAB-12 400W / 800W 12" 6 Ohm Subwoofer Driver | eBay

100L tuned to 20Hz will do the business, see :
Monolith+ DF+ and FF+
and
http://www.bkelec.com/HiFi/Sub_Woofe...h%20Review.pdf

rgds, sreten.
__________________
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow
  Reply With Quote
Old 14th January 2013, 05:23 PM   #7
diyAudio Member
 
Join Date: Feb 2011
Location: Colorado, USA
Quote:
Originally Posted by sreten View Post
...With 40Hz Fs you ain't going to get very low for all that
cabinet volume...
I thought Mick Jagger was the only Brit that used "ain't."

Anyway, OP said he wants to build 4 subs, is that correct? Are you going for the multi sub room smoothing concept or did I get that wrong?

I sold a a large sub back in the 70s that used eight 8 inch Polydax bextrine woofers in a vented coffin sized cabinet that could move some serious air down low. That's back when the concept of "fast bass" was popular. I used the sand and epoxy trick to bring the Fs down a few Hz.
  Reply With Quote
Old 15th January 2013, 05:24 AM   #8
diyAudio Member
 
Join Date: Feb 2010
So in other words this could work fine?

I did some simulations in WinISD and hornresp and the kurves looked nice but I thougt "Whats the catch". You know I am pretty new to this.

Is it not so that many subs is easier to integrate with the bookshelves than just one.

Fredrik
  Reply With Quote
Old 15th January 2013, 08:54 AM   #9
bjorno is offline bjorno  Sweden
diyAudio Member
 
Join Date: Mar 2005
Location: Jacobsmountain
Send a message via MSN to bjorno
Quote:
Originally Posted by Ekand View Post
So in other words this could work fine?

I did some simulations in WinISD and hornresp and the kurves looked nice but I thougt "Whats the catch". You know I am pretty new to this.

Is it not so that many subs is easier to integrate with the bookshelves than just one.

Fredrik
Hi Fredrik,

Work fine'? IME, I believe you will be surprised of the very good SQ that comes when choosing T-QWP: s or T-TQWT: s...
..and 'No catch' as far as I can see other than the possibility to IMO preferably pick a single folded design (not the simpler BR 100mm(~98.4) diameter port/21(20) cm length)...if.... your 'Mission Bookshelf Speakers' have an f-3dB of 52..57Hz but if around 75Hz:

I would not hesitate to choose a cabinet with more than one bend (more extended upper end BW) or the mentioned simpler BR. An example of a single fold using the Peerless SKO204 driver(s):

.. If I were you I would invest in more than 4 drivers: One or two flanking(lateral placed) smaller BR boxes would be a good idea to include besides one or two main sub(s) using 2-driver cabinet(s)..

b

PS: You may dig into this thread concerning single folded T-TQWT: s. Copy and scale the dimensioning if you choose to make a couple of these.

Fiddling with Hornresp - Peerless 831759
Attached Images
File Type: jpg Peerless-SK0204_70L_Single-folded_T-TQWT.JPG (403.8 KB, 188 views)
  Reply With Quote
Old 15th January 2013, 10:13 AM   #10
diyAudio Member
 
Join Date: Feb 2010
Default Delay

Hi

If i do the T-TQWT do I have to delay them like the tapperd horns when getting them to play along with my Missions?

Fredrik
  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 (India) Sub? flypig Subwoofers 49 24th January 2012 09:29 AM
Anyone used a Fountek NeoCD3.0 Ribbon and/or a Peerless 5" HDS exclusive woofer? spot Multi-Way 19 18th September 2011 02:57 PM
10 pieces of peerless India 5" speaker oon_the_kid Multi-Way 0 17th January 2011 07:28 AM
Peerless India: Anyone need 12" subwoofer driver? yusuf Parts 0 10th January 2007 09:48 AM
Wtb Peerless 850122 Csx 6-1/2" Woofer kestrel200 Swap Meet 0 21st February 2005 11:15 PM


New To Site? Need Help?

All times are GMT. The time now is 08:56 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