Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

is L-PAD attenuator recommended for a 6 1/4 midbass?
is L-PAD attenuator recommended for a 6 1/4 midbass?
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 30th October 2008, 12:57 PM   #1
rhythmdiy is offline rhythmdiy  India
diyAudio Member
 
Join Date: Dec 2006
Default is L-PAD attenuator recommended for a 6 1/4 midbass?

Ive ordered a 10 inch Vifa PL26w driver for 4 ohms but It got shipped as 8 ohm driver which is making me a problem to design the crossover ... I have a 4 ohm
Midbass>
http://www.wavecor.com/html/wf160wa01.html
Tweeter>
http://www.wavecor.com/html/tw030wa02.html
Woofer>
http://www.tymphany.com/pl26wr09-08

Since i need to match the sensitivities I can get down the tweeter sensitivity to the woofer level from 94db to 87db... but how about midrange? I ve seen some threads where one doesnt advice to use a l-pad for a midrange? is it so ? then how do i match the sensitivities of these drivers ...

Another question that i have is that the woofer is said to have 6db more than the mid and tweeters since the room will absorb alot of bass... so do i need to make the sensitivity of the tweeter and the midbass to 81db? since the woofer sensitivity is 87db....

can anybody pls give me the right advice...
thanks...
  Reply With Quote
Old 30th October 2008, 03:12 PM   #2
sreten is offline sreten  United Kingdom
R.I.P.
 
Join Date: Nov 2003
Location: Brighton UK
Hmmm ..........

The bass driver given its response seems to be suited to a 3 way
of 82dB to 85dB midband / treble depending on BSC amount.

You can L-pad the midrange but you need to include any effects
of the increase in source impedance on the driver Qts and the c/o.
(the same is also true for tweeters)

Alternatively go active bass / mid with more power for the bass,
you could also use active BSC on the mid driver for high efficiency
in the upper midrange and treble (90dB+).

/sreten.
  Reply With Quote
Old 30th October 2008, 06:17 PM   #3
rhythmdiy is offline rhythmdiy  India
diyAudio Member
 
Join Date: Dec 2006
Is there anyother alternative?
  Reply With Quote
Old 30th October 2008, 06:57 PM   #4
sreten is offline sreten  United Kingdom
R.I.P.
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

You can use a transformer/autotransformer but not common.

Or go with two 8 ohm 10" drivers per side, for 4 ohms and ~ 89dB.

/sreten.
  Reply With Quote
Old 30th October 2008, 08:30 PM   #5
rhythmdiy is offline rhythmdiy  India
diyAudio Member
 
Join Date: Dec 2006
at present I cant afford using two 10 inch drivers per channel to do the job but ofcourse its how I wanted in the beginning but i could go with single driver for now so i think I should be happy with L-pad atten for both mid and tweets what do u say?

Reducing 7db for the tweeter and 4.5 db for midbass would be ok? to match it to 87db woofer?
  Reply With Quote
Old 31st October 2008, 01:49 PM   #6
sreten is offline sreten  United Kingdom
R.I.P.
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

Read up on baffle step (compensation).

http://www.rjbaudio.com/Audiofiles/FRDtools.html
http://www.geocities.com/woove99/Spk...esigningXO.htm

http://www.rjbaudio.com/projects.html

Understand RJB's 3 way designs.

And this 3.5 way :

http://www.zaphaudio.com/ZDT3.5.html

/sreten.
  Reply With Quote

Reply


is L-PAD attenuator recommended for a 6 1/4 midbass?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Recommended Repairer welshkid Solid State 1 12th June 2008 08:39 PM
Recommended diy Pre for T-amp t. Class D 12 21st June 2005 09:56 AM
Recommended 2-way for beginner Dave Bullet Multi-Way 5 28th February 2003 09:57 AM


New To Site? Need Help?

All times are GMT. The time now is 07:25 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki