Opinions Needed: Vifa P21WO-20-08 - 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 13th September 2008, 05:26 PM   #1
diyAudio Member
 
Join Date: Aug 2008
Default Opinions Needed: Vifa P21WO-20-08

Hi all,

I have been searching for reviews of the Vifa P21WO-20-08 midwoofer. I would be interested in any links you might have - distortion analysis, sound quality opinions, documented designs, crossover points and the like.

Thanks,

Jim
  Reply With Quote
Old 13th September 2008, 06:16 PM   #2
PB2 is offline PB2  United States
diyAudio Member
 
PB2's Avatar
 
Join Date: Sep 2004
Location: North East
Blog Entries: 1
It is used here:
http://www.linkwitzlab.com/proto.htm
  Reply With Quote
Old 13th September 2008, 10:28 PM   #3
Andy G is offline Andy G  Australia
diyAudio Member
 
Andy G's Avatar
 
Join Date: Apr 2002
Location: Newcastle, Australia
I used the P21WO in "Windswept", and had previously used it in other vented and sealed apps.
http://members.optusnet.com.au/~grad.../windswept.htm

The P21WO is a reasonably soft coned driver, and I found that when used in sealed or vented, the mid quality suffered. It does do pretty darn good bass in a vented box, but it needs to be rather large (50L+ iirc.)

In Windswept the driver is much freer to move and the mids that it produces are really VERY good, and in combination with the old Seas 27TFFC makes for very good listening. iirc I used a first order series xo crossed at around 2.2k

If you are not able to use it in something like a big tapered pipe, my recommendation would be to use it as a bass unit in a 3-way, with something like a P13 or P11 doing the mids.
  Reply With Quote
Old 14th September 2008, 09:49 PM   #4
diyAudio Member
 
Join Date: Aug 2008
Thanks for the information guys. Wow Andy - are you the creator of Windswept? If so you certainly have a talent for design!

Hmm 50L you say? I am thinking of doing a smallish 2 way, so they might be out. I like to look of the P21's, and have had my eye on them for some time but maybe they aren't suited for this purpose. I noticed the Vas was rather high, which would need a larger cabinet for a lower Q. (I'm thinking about .60 or so)

Interesting stuff though, thanks!
  Reply With Quote
Old 15th September 2008, 03:51 AM   #5
Andy G is offline Andy G  Australia
diyAudio Member
 
Andy G's Avatar
 
Join Date: Apr 2002
Location: Newcastle, Australia
I certainly would NOT recommend using the P21 in a small sealed cabinet. Its an old style driver and needs room to do its job properly.

http://members.optusnet.com.au/~gradds55/index.html
  Reply With Quote
Old 15th September 2008, 04:03 AM   #6
diyAudio Member
 
Join Date: Dec 2002
Location: Utah
I can report that for the money this is an outstanding driver. In a large enough vented or aperiodic cabinet the lower midrange is quite natural in the vocal regions for a poly cone driver. And as Andy has stated the bass is strong for an 8 inch driver. It will also make a good budget 8 inch two way since it has a relatively smooth breakup region.

Mine are used as bass drivers in a 1.5 cubic foot aperiodic cabinet. Bass quality is amazing for a poly cone woofer in this type of loading.
  Reply With Quote
Old 15th September 2008, 04:26 AM   #7
PB2 is offline PB2  United States
diyAudio Member
 
PB2's Avatar
 
Join Date: Sep 2004
Location: North East
Blog Entries: 1
http://www.linkwitzlab.com/mid_dist.htm
  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
FS: Vifa P21WO & D27TG45 - linkwitz PMT1 santiu Swap Meet 3 24th February 2009 04:29 AM
Hornloading Vifa P21WO-20-08 ???? Circlomanen Multi-Way 1 18th July 2008 07:33 PM
Vifa P21WO-39-08 Alexnick Multi-Way 25 19th January 2006 09:56 AM
Vifa P21WO-39-08 Woofer - Sealed sunil Multi-Way 62 25th September 2003 02:57 PM
Vifa P21WO-20-12 measurements? Phear Multi-Way 1 28th June 2003 10:12 AM


New To Site? Need Help?

All times are GMT. The time now is 08:57 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