Please sanity check my ideas for a 281 variant with Vifa PL22s. - diyAudio
Go Back   Home > Forums > Design & Build > Parts
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

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
Thread Tools Search this Thread
Old 31st March 2004, 10:43 PM   #1
diyAudio Member
Join Date: Mar 2004
Location: Maryland
Default Please sanity check my ideas for a 281 variant with Vifa PL22s.

I am trying to locate a set of plans for a pair of HT mains that would work nicely with the Vifa PL22 8" woofers I have.

I have looked around quite a bit and the best I can come up with is to use a variation of the Kit 281 enclosure since the PL22 specs appear to my inexperienced eyes to be very close to the AV8:

AV8 PL22-04
Fs 35.8 27
Vas 56 56
Qts 0.39 0.34
Qes 0.43 0.37
Qms 5.65 5.91
Xmax 5.6 mm 4mm
EBP 83.3
SPL 89.3 dB 86db
BL 9.06 N/A 10.9
Le 1.15 mH 2.7mH
Re 5.48 ohms 3.2

The inportant differences is that the vifa goes a little lower, and it's 4 ohm vs 8 ohm and the AV8 has a somewhat flatter response, especially between 1-2khz.

I am thinking of using two of these drivers in a smaller version of the 281 sealed enclosure: about 23l vs. 27 from the 281 plans. This gives me a F3 of about 60Hz which seems fine for HT use. I also like the simplicity of a sealed design because there are fewer variables to get wrong.

Does this seem reasonable? Am I missing something here? Any suggestions for tweeters that will integrate well with minimal fussing with the crossover.

I would also greatly appreciate a helping hand with the crossover design, especially how one handles two 4 ohm woofers....

Thanks in advance

  Reply With Quote
Old 1st April 2004, 08:21 AM   #2
sreten is offline sreten  United Kingdom
diyAudio Member RIP
Join Date: Nov 2003
Location: Brighton UK
two 4 ohm drivers in parallel will cripple your amplifier,

  Reply With Quote
Old 1st April 2004, 09:53 AM   #3
sreten is offline sreten  United Kingdom
diyAudio Member RIP
Join Date: Nov 2003
Location: Brighton UK
I've also checked out the PL22-04.

Sensisitivity is low for a 4 ohm unit, but linear throw is good.

Its a pure bass unit, entirely unsuitable for midrange use.

They would be excellent for the subwoofer, or 5 small sealed
box AV speakers with left and right with stereo subwoofers.

Used in series they would also be in the right ballpark for some
3-way louspeaker designs, instead of a 8 ohm 10" or 12" unit.

  Reply With Quote
Old 1st April 2004, 05:56 PM   #4
diyAudio Member
Join Date: May 2002
Location: Cambridge, MA, USA
Send a message via AIM to Kilentra
Hi Philip, I would suggest just waiting on the AV8s. There's no way you could drop in PL22s.

BTW, where do you live? I'm in Gaithersburg and I own Kit281s.
  Reply With Quote


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
F1 Voltage sanity check rpafenberg Pass Labs 7 28th March 2009 10:42 AM
Sanity Check ..... please Lostcause Digital Source 0 16th October 2008 06:19 PM
This model can't be right... need sanity check NogginBoink Subwoofers 4 30th July 2005 09:14 PM
Ideas for system using vifa Pl22s, please? philiprst Multi-Way 0 2nd April 2004 01:52 AM
Sanity check planet10 Multi-Way 14 7th March 2004 10:15 PM

New To Site? Need Help?

All times are GMT. The time now is 04:22 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2