OK to wire 2 inductors in series? - 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 1st July 2004, 01:51 AM   #1
Pat S is offline Pat S  United States
diyAudio Member
 
Join Date: Jun 2004
Location: Puget Sound Washington
Default OK to wire 2 inductors in series?

I am adding Fountek ribbons to my 1.6 Maggies. At first I wanted to crossover at about 5000Hz but due to my lack of knowledge I am shooting for the 8000Hz area, thinking I will do less damage there. They don't make these little foil inductors in too many sizes so I was wondering if it sounds bad when you wire 2 foil inductors in series to get closer to the textbook values?

Thanks
  Reply With Quote
Old 1st July 2004, 11:41 AM   #2
diyAudio Member
 
li_gangyi's Avatar
 
Join Date: Jun 2003
Location: Woodlands Circle
in theory it would work...but u have to make sure the magnetic fields DO NOT interact with one another...and u also have higher resistance...
__________________
Kids in the back seat cause accidents...Accidents in the back seat cause kids...
  Reply With Quote
Old 1st July 2004, 01:41 PM   #3
rabbitz is offline rabbitz  Australia
diyAudio Member
 
rabbitz's Avatar
 
Join Date: Jul 2003
Location: Newcastle, Australia
Make sure you place the 2 inductors at right angles to each other (1 flat and the other standing up) and at least 75mm apart to avoid magnetic coupling.

You might be able to wind on additional turns so you have only 1 inductor or get a larger size and unwind some turns.

With crossing over at 8000Hz means that the inductors are going to have small values so the DCR isn't going too be high if you run 2 in series. Just aim for the DCR is less than 5% of the driver DCR. So if your driver DCR is say 4ohm then keep the inductor total DCR less than 0.2ohm.

Hope this helps.

Cheers
  Reply With Quote
Old 1st July 2004, 04:51 PM   #4
markp is offline markp  United States
diyAudio Member
 
Join Date: Oct 2003
Location: L.A., CA
Two inductors in series is fine but you would be better off buying a larger coil and unwinding it to the value you need.
__________________
If it sounds good... it is good!
  Reply With Quote
Old 1st July 2004, 06:37 PM   #5
Pat S is offline Pat S  United States
diyAudio Member
 
Join Date: Jun 2004
Location: Puget Sound Washington
Thanks for the replies. I didn't think of unwinding the coil of a larger inductor. I can probably find out how much form the retail outlet.

I ordered two speaker building books so I hope to keep the questions to a minimum.

Thanks to everyone who contributes to this forum.
  Reply With Quote
Old 1st July 2004, 09:51 PM   #6
diyAudio Member
 
Join Date: Jan 2004
Location: dark side of the moon
You can also call alphcore and have them make one for you. There price is based on the cost of the next closest inductorer to the value you want. Look at there web site.


Pete
  Reply With Quote
Old 3rd July 2004, 04:39 AM   #7
rabbitz is offline rabbitz  Australia
diyAudio Member
 
rabbitz's Avatar
 
Join Date: Jul 2003
Location: Newcastle, Australia
There's a good little inductor calculator here:

http://members.optusnet.com.au/~audiosoft/inductor.exe

Can help in working out how many turns to remove and is quite accurate as have checked with a LCR meter. Won't help on foil inductors though.
  Reply With Quote
Old 3rd July 2004, 10:17 AM   #8
Pat S is offline Pat S  United States
diyAudio Member
 
Join Date: Jun 2004
Location: Puget Sound Washington
Thanks for the help guys, this is a great site.

I ordered two Weems speaker building books from the library and bought a 1985 version of High Performance Loudspeakers by Martin Colloms off the internet today for $10, $13 delivered to the door. I hope it isn't missing too many pages.
  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
Inductors in series/parallel? QED047 Class D 6 11th August 2009 04:10 PM
Series Inductors question arc2v Multi-Way 20 28th September 2007 06:12 PM
Copper foil versus wire in inductors klitgt Multi-Way 43 6th June 2006 05:18 PM
Square magnet wire for inductors? Raoul Parts 10 15th July 2005 05:38 PM


New To Site? Need Help?

All times are GMT. The time now is 04:27 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