swapping woofers with 2db difference in sensitivity - 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 14th December 2012, 10:29 AM   #1
diyAudio Member
 
Join Date: Jan 2006
Location: asdsadsa
Default swapping woofers with 2db difference in sensitivity

Planning to swap a focal 11w to 11wx without crossover changes.

Both are 11" and the 11wx is 2db lower in sensitivity. I assume since the drivers are both focal, tonality should not be far off.

Will this be a mistake as and have low bass output from the new driver?
  Reply With Quote
Old 14th December 2012, 12:18 PM   #2
diyAudio Member
 
Join Date: Mar 2008
Location: UK
2dB is quite a lot! i would recommend pulling down the level of the other bands.
__________________
__________________________
kickin the place all over the bass
  Reply With Quote
Old 14th December 2012, 02:12 PM   #3
diyAudio Member
 
Join Date: Feb 2008
Location: Enschede
'Both Focal' is like comparing a Volkwagen Beetle to a Golf. Same brand, similar size, but different car nonetheless. The type numbers may sound alike, but they're different drivers. It's well worth the effort to find the correct types if your original drivers are defective!
  Reply With Quote
Old 14th December 2012, 03:03 PM   #4
diyAudio Member
 
mondogenerator's Avatar
 
Join Date: Sep 2009
Location: City Of Villans
Blog Entries: 1
agree. 2db is certainly audible, and similar model numbers doesnt necessarily make their sound similar.
__________________
Every new piece of knowledge pushes something else out of my brain - Homer.....................Simpson
  Reply With Quote
Old 14th December 2012, 03:09 PM   #5
diyAudio Member
 
Join Date: May 2010
Location: MN
The sensitivity difference is actually pretty negligible in the main 100-1000Hz range, but a look at the spec sheets shows that everything else is pretty different. The impedance curves alone rule out using the same crossover, assuming you are starting with a crossover designed for the first driver. UNLESS, I found the wrong spec sheets...
  Reply With Quote
Old 14th December 2012, 03:36 PM   #6
diyAudio Member
 
Join Date: Jan 2006
Location: asdsadsa
The focal11wx is much better unit than the 11w inmy focals.with age, the spiders are lstarting to cause problems with low bass material and felt it may be a worthwhile stab in the dark.

I maybe adventurous to swap resistors of the tweeter and mid in the even the bass output is insufficient.

Given room acoustic issues with any set of speakers with muddy and boomy bass, swapping a superior driver may morethan compensate of a unoptimised cross over?

Do my thoughts hold and room to experiment?
  Reply With Quote
Old 15th December 2012, 07:34 AM   #7
diyAudio Member
 
Join Date: Mar 2008
Location: UK
The only way to be sure is to try it!
__________________
__________________________
kickin the place all over the bass
  Reply With Quote
Old 15th December 2012, 03:11 PM   #8
puppet is offline puppet  United States
diyAudio Member
 
Join Date: Dec 2011
Location: The Dells, WI
My guess is that if you're going to experience a change in sensitivity lower is better than higher. Depends on where they're xo is too. Personally, I can hear a 1/2db change in typical woofer range.
  Reply With Quote
Old 15th December 2012, 05:52 PM   #9
AJ34 is offline AJ34  United Kingdom
diyAudio Member
 
Join Date: Jul 2012
[QUOTE=justubes;3284645]Given room acoustic issues with any set of speakers with muddy and boomy bass, swapping a superior driver may morethan compensate of a unoptimised cross over?QUOTE]

Not necessarily.

I don't think anyone can say for certain (unless they've actually tried exactly the same modification) how well such a change would work out but chances of success are stacked against you for reasons already mentioned. No harm in trying but have a 'plan B' in mind.

There may still be a few specialists out there that will design you a completely new crossover for your intended drivers - as Wilmslow Audio (UK) did when I replaced both SEAS drivers in a two-way passive system with two Focal drivers. Worked a treat. Good luck.
  Reply With Quote
Old 16th December 2012, 06:23 AM   #10
diyAudio Member
 
Join Date: Jan 2006
Location: asdsadsa
I don't have the specs for the tweeter and mids, but do have the existing crossover diagram.

Neither do I know the existing spec for the woofer to be replaced.

This option may be tough.

I was just think to use a l-ad for the miss and tweets in the worst case senario.

[QUOTE=AJ34;3286235]
Quote:
Originally Posted by justubes View Post
Given room acoustic issues with any set of speakers with muddy and boomy bass, swapping a superior driver may morethan compensate of a unoptimised cross over?QUOTE]

Not necessarily.

I don't think anyone can say for certain (unless they've actually tried exactly the same modification) how well such a change would work out but chances of success are stacked against you for reasons already mentioned. No harm in trying but have a 'plan B' in mind.

There may still be a few specialists out there that will design you a completely new crossover for your intended drivers - as Wilmslow Audio (UK) did when I replaced both SEAS drivers in a two-way passive system with two Focal drivers. Worked a treat. Good luck.
  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
Swapping potentiometer ArthurZ Analog Line Level 3 29th October 2012 06:49 PM
best high sensitivity woofers? Bill poster Multi-Way 15 30th March 2010 08:48 AM
driver sensitivity vs system sensitivity bvan Full Range 12 5th November 2007 07:57 PM
Sensitivity match in a 3-way system? all of equal sensitivity? or bass is 6db more? rhythmdiy Multi-Way 5 5th November 2007 11:33 AM
Swapping an A/C Adapter FrankRoss Power Supplies 2 11th May 2006 01:16 AM


New To Site? Need Help?

All times are GMT. The time now is 07:24 AM.


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