$5 woofers at PE might work on OB... - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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 8th July 2011, 06:27 PM   #1
diyAudio Member
 
Godzilla's Avatar
 
Join Date: Nov 2005
Location: New York
Default $5 woofers at PE might work on OB...

How low might this cheap 8" driver go on an OB or H-frame?

8" General Purpose 8 Ohm Ribbed Paper Cone Woofer

I'm wondering how these might perform in H-frames (one or even two) powered by a sub amp as a slim subwoofer?

TIA
  Reply With Quote
Old 8th July 2011, 06:30 PM   #2
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
From memory, the mass-corner is Fs/Qts, which yields good results in this case.

I think I'd take 2 per side on a H-frame. At that price, you might as well buy a couple extra in case you blow some up
__________________
"Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo
My setup: http://www.diyaudio.com/forums/multi...tang-band.html
  Reply With Quote
Old 8th July 2011, 07:00 PM   #3
Pano is online now Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Kona, Hawaii
Blog Entries: 4
4 per side maybe. That's $16 per side. You might still have trouble getting down below the Fs of 45Hz.
  Reply With Quote
Old 8th July 2011, 07:07 PM   #4
diyAudio Member
 
Join Date: May 2009
Location: Seattle, WA
I recently tried an OB experiment with some very cheap "white van" type speakers. My buddy and I cut the speakers in half at an angle and then used iTunes to provide some semblance of a balanced response. What I can tell you is that while those cheap woofers did produce bass, it was pretty lousy bass. I got no impression of the clean, articulate OB bass people talk about. This leads me to suspect that there is a major difference between a "cheap" woofer like the alpha15 and a CHEAP woofer like what's in the white van speakers. That leads me to ask: what are the chances that this cheap woofer will really sound all that good? Isn't this the kind of woofer that shows up in white van speakers in the first place?

Maybe using 4+ per side will reduce distortion and improve SQ...
__________________
Then again, what do I know?
  Reply With Quote
Old 8th July 2011, 07:10 PM   #5
Pano is online now Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Kona, Hawaii
Blog Entries: 4
4 per side would give you a cone area of about 160 sq in, (I think) compared to the Alpha 15 at about 137 sq in. So each driver would not have to work too hard.

For the price of the Alpha 15 you could have 16 of these.
__________________
Take the Speaker Voltage Test!
  Reply With Quote
Old 8th July 2011, 08:05 PM   #6
onform is offline onform  United Kingdom
diyAudio Member
 
onform's Avatar
 
Join Date: Apr 2008
They look like you could have some fun experimenting with them!

Is there anywhere in the UK/Europe that does these sorts of deals??
  Reply With Quote
Old 8th July 2011, 08:59 PM   #7
diyAudio Member
 
Join Date: May 2009
Location: Seattle, WA
Quote:
Originally Posted by Pano View Post
For the price of the Alpha 15 you could have 16 of these.
So what's the plan, guys? How about 8 per side, wired for a 4ohm load and 99db sensitivity; then put in an H-frame for a lower Fs and resulting lower Fo, and an overall sensitivity of 89db after dipole loss? I have to admit, it does sound appealing!

Question: can you place them side by side on an open baffle as opposed to stacking? So maybe it would look like:

OOOO
OOOO

or put a fullranger in the middle like...

O O
O O
o
O O
O O
__________________
Then again, what do I know?

Last edited by chazdrumzalot; 8th July 2011 at 09:02 PM.
  Reply With Quote
Old 8th July 2011, 09:31 PM   #8
Tom V is offline Tom V  United States
diyAudio Member
 
Join Date: Jan 2010
Or six? Arranged in a circle with the full-ranger in the middle?
  Reply With Quote
Old 8th July 2011, 10:31 PM   #9
Pano is online now Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Kona, Hawaii
Blog Entries: 4
That might be fun.

But don't be shy, do 16 per side. 12, at least.
  Reply With Quote
Old 8th July 2011, 10:34 PM   #10
diyAudio Member
 
Join Date: May 2009
Location: Seattle, WA
Quote:
Originally Posted by Pano View Post
That might be fun.

But don't be shy, do 16 per side. 12, at least.
And what will SWMBO have to say to that idea?
__________________
Then again, what do I know?
  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
Budget 12" OB candidate at PE for $29US mpmarino Multi-Way 0 1st May 2009 09:51 PM
OB 3 Woofers? NurEinTier Multi-Way 22 3rd July 2008 05:49 PM
OB efficiency with 2 or 4 woofers tinitus Multi-Way 29 19th June 2008 01:09 PM
Anyone tested 'Etone' woofers for OB? grantnsw Multi-Way 33 3rd March 2008 10:29 AM
Woofers for OB array G.L. Tirebiter Multi-Way 0 9th March 2005 05:49 PM


New To Site? Need Help?

All times are GMT. The time now is 06:03 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