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

Two 4 ohm woofers in series or two 16 ohm in parallel. Which is better?
Two 4 ohm woofers in series or two 16 ohm in parallel. Which is better?
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 2004, 08:41 PM   #1
Cal Weldon is offline Cal Weldon  Canada
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
Two 4 ohm woofers in series or two 16 ohm in parallel. Which is better?
Default Two 4 ohm woofers in series or two 16 ohm in parallel. Which is better?

Hi everyone,

I'm not sure about anyone else but I don't seem to have much luck when I run two 4 ohm woofers in series. It seems to change the sound. I don't mean that it's quieter, I mean that it seems to lose some of the bass altogether and gain some in the mid. I recognize the change in impedance will alter the Xover point but I just seem to lose bass. I am using a 6.2 mH choke in series and a cap across for a 2nd order.

When I parallel two 16 ohm woofers, not only do I get an increase in the volume, but the overall sound doesn't seem to change. I don't have a scope or an SPL meter to check.

I would like to keep my impedance at 8 ohms.

Do I just live with the fact I enjoy the parallel circuit more and be done with it or is there more I should know?

Thank for your help

Cal
  Reply With Quote
Old 20th February 2004, 08:45 PM   #2
markp is offline markp  United States
diyAudio Member
 
Join Date: Oct 2003
Location: L.A., CA
Its the series inductance of the voicecoils that changes things. In series each woofer see the source resistance and inductance of the other woofer. Use a parallel setup for 8 ohms from 2 16s.
__________________
If it sounds good... it is good!
  Reply With Quote
Old 20th February 2004, 08:49 PM   #3
coolkhoa is offline coolkhoa  United States
diyAudio Member
 
coolkhoa's Avatar
 
Join Date: Jan 2004
Location: Houston
Send a message via AIM to coolkhoa Send a message via MSN to coolkhoa Send a message via Yahoo to coolkhoa
Default Re: Two 4 ohm woofers in series or two 16 ohm in parallel. Which is better?

Quote:
Originally posted by Cal Weldon
I'm not sure about anyone else but I don't seem to have much luck when I run two 4 ohm woofers in series. It seems to change the sound. I don't mean that it's quieter, I mean that it seems to lose some of the bass altogether and gain some in the mid.
Cal [/B]

How many times have you wired 4-ohm woofers in series? If your claim is the result of multiple experiences, I must take it seriously...
__________________
KTK. Kool To the Kore.
  Reply With Quote
Old 20th February 2004, 08:52 PM   #4
markp is offline markp  United States
diyAudio Member
 
Join Date: Oct 2003
Location: L.A., CA
Also with 2 woofers in parallel you get a 6db increase relative to a single driver. Half the impedance = 3db and two drivers producing the same sound = 3db.
__________________
If it sounds good... it is good!
  Reply With Quote
Old 20th February 2004, 08:59 PM   #5
Cal Weldon is offline Cal Weldon  Canada
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
Two 4 ohm woofers in series or two 16 ohm in parallel. Which is better?
Car audio woofers are often 4 ohms and quite inexpensive. When I run them on a house system, I prefer 8 ohms. So I series them. My big ones are that way, so are the 4 dual 10 cabinets on top.

Here they are again,
Cal
Attached Images
File Type: jpg my biggies.jpg (65.5 KB, 352 views)
  Reply With Quote
Old 20th February 2004, 09:04 PM   #6
officeboy is offline officeboy  United States
diyAudio Member
 
Join Date: Nov 2003
Location: NW Washington
Send a message via MSN to officeboy
Hah, you just like to show that picture..

  Reply With Quote
Old 20th February 2004, 09:14 PM   #7
woody is offline woody
diyAudio Member
 
Join Date: Jan 2002
Location: Tyrone Ga. U.S.A.
Two 4 ohm woofers in series or two 16 ohm in parallel. Which is better?
Cal,
Could you be wiring them out of phase ?
  Reply With Quote
Old 20th February 2004, 09:15 PM   #8
sreten is offline sreten  United Kingdom
R.I.P.
 
Join Date: Nov 2003
Location: Brighton UK
My opinion is two 4 ohm in series with one driver reversed and
connected out of phase is the best arrangement for 8 ohms.

sreten.
  Reply With Quote
Old 20th February 2004, 09:17 PM   #9
Cal Weldon is offline Cal Weldon  Canada
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
Two 4 ohm woofers in series or two 16 ohm in parallel. Which is better?
You're right officeboy,

I waited twenty five years to get that set up, and now I want the whole world to see.

Look at me, look at me!

But seriously, I have that problem everytime I do two in series. Just last night I did an experiment with the biggies and once again I am not as happy as I should be. I rewired and swapped woofers etc. The big ones actually sound better with only one 4 ohm woofer hooked up.

What a guy to do?
  Reply With Quote
Old 20th February 2004, 09:21 PM   #10
Cal Weldon is offline Cal Weldon  Canada
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
Two 4 ohm woofers in series or two 16 ohm in parallel. Which is better?
They are not out of phase.

When you wire these out of phase you are left with nothing more than a great big midrange. A crappy one at that.

This is the wiring
Attached Images
File Type: jpg inside a4.jpg (72.7 KB, 328 views)
  Reply With Quote

Reply


Two 4 ohm woofers in series or two 16 ohm in parallel. Which is better?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
Three 10" 4Ohm subs, wired in series or series-parallel? Nagamitsu Car Audio 38 19th February 2014 11:16 PM
Series vs Parallel for dual Accuton Woofers Cousin Billy Multi-Way 15 25th December 2008 05:59 PM
2 Woofers in Parallel Config - 4 Options HiFiNutNut Multi-Way 16 23rd November 2006 03:23 PM
LM3886 GC + Behringer + Parallel woofers Q PeteW Chip Amps 0 4th April 2005 06:55 AM
unidentical woofers in series/parallel? Jay Multi-Way 5 25th January 2004 09:18 PM


New To Site? Need Help?

All times are GMT. The time now is 02:34 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki