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

series vs parallel SPL?
series vs parallel SPL?
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 February 2006, 06:02 PM   #11
MJK is offline MJK  United States
Account disabled at member's request
 
Join Date: Feb 2002
Location: Clifton Park, NY
If you look under the General Speaker Related Articles page on my site you will find a short write-up about wiring two drivers in series or parallel along with a worked example that calculates the equivalent driver properties and the SPL resposne.
  Reply With Quote
Old 20th February 2006, 06:15 PM   #12
kelticwizard is offline kelticwizard  United States
Wizard of Kelts
diyAudio Moderator Emeritus
 
Join Date: Sep 2001
Location: Connecticut, The Nutmeg State
series vs parallel SPL?
The link to that short article is here.
__________________
"A friend will help you move. A really good friend will help you move a body."
-Anonymous
  Reply With Quote
Old 20th February 2006, 11:31 PM   #13
Lusso5 is offline Lusso5  United States
diyAudio Member
 
Lusso5's Avatar
 
Join Date: Jul 2003
Location: Houston, TX
Attached is a visual of (8) 16ohm drivers that are 100dB in two configurations to end up with 8ohm. The figures in the visual represent power conversion only (i.e 3db), but even if acoustical conversions are entered, you'll still arrive at 112dB for both.

Both configurations end up at 8ohm, but one group has 6 parallel groups, and one has 3 parallel groups.

Which configuration is more efficient?
Attached Files
File Type: pdf 16ohm.pdf (4.2 KB, 57 views)
  Reply With Quote
Old 21st February 2006, 06:29 PM   #14
e-side is offline e-side  Netherlands
diyAudio Member
 
Join Date: Jun 2005
Location: The Netherlands
Quote:
Originally posted by kelticwizard
Of course, since our 8 ohm somposite spekaer is an 8 ohmer, it will get only hald the power delivered to it that the 4 ohm single speaker will, so the SPL per 2.83 Volts will equal the 4 ohm speaker. Even though it is only drawing half the power. Because the the 8 ohm composite speaker is 3 db more sensitive per watt.
You're right, I'm wrong.

regards

Erwin
  Reply With Quote
Old 21st February 2006, 08:53 PM   #15
vadi is offline vadi  Austria
diyAudio Member
 
vadi's Avatar
 
Join Date: Feb 2006
Location: Wean
Hi!

Can I lower the SPL of a woofer by adding a resistor?


Regards,

Sladjan
  Reply With Quote
Old 22nd February 2006, 10:26 AM   #16
e-side is offline e-side  Netherlands
diyAudio Member
 
Join Date: Jun 2005
Location: The Netherlands
Quote:
Originally posted by vadi

Can I lower the SPL of a woofer by adding a resistor?
Probably yes, but adding a resistor in series with the woofer will change the parameters of the woofer (Qes and Qts).

When your woofer has, for example, the following parameters:

Re = 8
Qms=4
Qes=0,4
Qts = 0,36

When you wire a 4 ohm resistor in series with the woofer, I believe Qes and Qts change as follow:

Qes' = Qes(1+(resistor/Re)) = 0,4 (1+(4/8)) = 0,6
Qts' = (Qms . Qes') / (Qms + Qes') = (4 . 0,6) / (4 + 0,6) = 0,52

I'm not sure the above will happen when you wire a resistor in parallel with the woofer, but the impedance changes because of the resistor.

regards

Erwin
  Reply With Quote
Old 22nd February 2006, 10:58 AM   #17
vadi is offline vadi  Austria
diyAudio Member
 
vadi's Avatar
 
Join Date: Feb 2006
Location: Wean
Thank you very much e-side!


Regards,

Sladjan
  Reply With Quote

Reply


series vs parallel SPL?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
What would you do? series/parallel MtnBob Multi-Way 22 23rd August 2016 02:41 AM
Three 10" 4Ohm subs, wired in series or series-parallel? Nagamitsu Car Audio 38 20th February 2014 12:16 AM
series or parallel? medicman Tubes / Valves 5 22nd January 2009 05:42 PM
Series vs parallel? legendaryfrog Full Range 5 14th December 2006 03:50 PM


New To Site? Need Help?

All times are GMT. The time now is 10:11 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki