Cheap and simple Open Baffle (a la MJK) - Page 2 - 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 20th March 2012, 08:08 PM   #11
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Quote:
Originally Posted by Tea-Bag View Post
Have you considered the highs might stink?
The graph's dont look too impressive.
Click the image to open in full size.

Vifa TC9FD-18-08 3-1/2" Full Range Paper Cone Woofer 264-1062

http://www.parts-express.com/pdf/264-1062s.pdf

Hi,

Given the above I don't think so but off axis response would be limited,
like all FR's. Yes you could add a tweeter but you'd be moving away
from MJK's basic premise. The off axis responses in the PDF suggest
a slightly off axis response could be flatter and a respectable power
response. Compared to similar drivers the highs won't suck at all.

For a real graph (Zaph's) the response looks very impressive to me.

I guess an option would be to look at this co-axial if a tweeter is needed:
http://www.parts-express.com/pdf/264-827s.pdf
Might work well with a zobelled bass/mid and high 1st order (series) x/o
to hit ~ 2nd order L/R acoustic around the x/o point, drivers out of phase.

rgds, sreten.

(Yes PE do do the Vifa, so that would be $120 a pair delivered free ....)
__________________
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

Last edited by sreten; 20th March 2012 at 08:28 PM.
  Reply With Quote
Old 20th March 2012, 10:19 PM   #12
ttan98 is offline ttan98  Australia
diyAudio Member
 
Join Date: Apr 2006
Location: Melb
Sreten,

Vifa TC9FD-18-08 3-1/2" Full Range Paper Cone Woofer 264-1062, from the spec. sheet the eff. is about 84dB and a PAIR in parallel should give you about 90dB not 93dB as you implied.

BTW, I use Mark Audio Ch-70 mark III the eff. is about 85.5dB and a parallel PAIR in dipole config. in a box gives me about 91.5dB good enough for my 10W tube amp.
  Reply With Quote
Old 20th March 2012, 11:51 PM   #13
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Quote:
Originally Posted by ttan98 View Post
Sreten,

Vifa TC9FD-18-08 3-1/2" Full Range Paper Cone Woofer 264-1062, from the spec. sheet the
eff. is about 84dB and a PAIR in parallel should give you about 90dB not 93dB as you implied.

BTW, I use Mark Audio Ch-70 mark III the eff. is about 85.5dB and a parallel PAIR in
dipole config. in a box gives me about 91.5dB good enough for my 10W tube amp.
Hi,

You need to read more carefully, the 93dB refers to the pair of suggested
bass units, not the driver itself. You have to mean bipole as opposed to
dipole, and quite frankly what has that got to do with this OB thread ?

Seems your just lazy and haven't worked out what this thread is about.

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

Last edited by sreten; 20th March 2012 at 11:56 PM.
  Reply With Quote
Old 21st March 2012, 01:35 AM   #14
ttan98 is offline ttan98  Australia
diyAudio Member
 
Join Date: Apr 2006
Location: Melb
Quote:
Originally Posted by sreten View Post
Hi,

You need to read more carefully, the 93dB refers to the pair of suggested
bass units, not the driver itself. You have to mean bipole as opposed to
dipole, and quite frankly what has that got to do with this OB thread ?

Seems your just lazy and haven't worked out what this thread is about.

rgds, sreten.



I know you have contributed a lot to this forum this does not mean you can start accusing whoever you want. I may have misread your post you don't have this rude it does go very far.

Goodbye I leave this forum to you and your follower.
  Reply With Quote
Old 21st March 2012, 03:57 PM   #15
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Quote:
Originally Posted by ttan98 View Post
I know you have contributed a lot to this forum this does not mean you can start accusing
whoever you want. I may have misread your post you don't have this rude it does go very far.
Hi, Your right, i was unecessarily rude, I apologise, 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

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
sub amp question for MJK open baffle pforeman Full Range 7 15th May 2009 07:19 PM
are there simple PLLXO soltuions for open baffle setups? freddi Full Range 3 11th February 2009 08:21 PM
Open Baffle Fun with Cheap Goldmine Speakers wrenchone Full Range 4 5th September 2008 08:07 AM
Open Baffle Line Array - using cheap drivers giambi77 Multi-Way 4 26th January 2004 09:29 PM
Uber cheap open baffle line arrays -- almost done ryoshu Multi-Way 5 1st July 2003 11:31 PM


New To Site? Need Help?

All times are GMT. The time now is 02:39 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