out put toroids for hard speaker loads - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 2nd June 2010, 01:17 AM   #1
diyAudio Member
 
Join Date: Oct 2007
Location: melbourne
Default out put toroids for hard speaker loads

hi all
a while ago i found a site that sells toroid transformers that you simply install in your speaker cables in between the amp and speakers which makes the amp see a different load so even though your speakers may be 4ohm your amp will see a 8ohm load

i cant seem to find them any more on the net and am hoping some one here knows this product and the website where i can buy them

cheers
  Reply With Quote
Old 2nd June 2010, 07:58 AM   #2
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
Quote:
Originally Posted by slr 5000 View Post
hi all
a while ago i found a site that sells toroid transformers that you simply install in your speaker cables in between the amp and speakers which makes the amp see a different load so even though your speakers may be 4ohm your amp will see a 8ohm load

i cant seem to find them any more on the net and am hoping some one here knows this product and the website where i can buy them

cheers
There was an article in AX a few years ago about this, I'll try to find it.

jd
__________________
If you don't change your beliefs, your life will be like this forever. Is that good news? - W. S. Maugham
Check out Linear Audio!
  Reply With Quote
Old 2nd June 2010, 09:18 AM   #3
C37 is offline C37  Belgium
diyAudio Member
 
Join Date: Mar 2003
Location: Brussels
There was a review of this on TNT audio. probably what you are looking for ( link to manufacturer on page)

Cheers,
  Reply With Quote
Old 2nd June 2010, 09:23 AM   #4
diyAudio Member
 
Join Date: Oct 2007
Location: melbourne
many thanks to jd and c37
that is exactly what i was after except for the price $700 for 2 toroids blaaah!

now how to diy ,they do not look to complicated hmmm
  Reply With Quote
Old 2nd June 2010, 10:01 AM   #5
defect9 is offline defect9  Ireland
diyAudio Member
 
defect9's Avatar
 
Join Date: Sep 2007
Location: Carson City, NV
I'm still sometimes a noob so correct me if I'm wrong, but isn't it possible to increase the impedence an amp sees by paralleling a resistor of sufficient watt-handling capacity with the speaker load?
  Reply With Quote
Old 2nd June 2010, 10:47 AM   #6
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
Quote:
Originally Posted by defect9 View Post
I'm still sometimes a noob so correct me if I'm wrong, but isn't it possible to increase the impedence an amp sees by paralleling a resistor of sufficient watt-handling capacity with the speaker load?
In series with, not in parallel
__________________
-------------------------------------------------------
Installing and using LTspice. From beginner to advanced.
  Reply With Quote
Old 2nd June 2010, 01:19 PM   #7
diyAudio Member
 
unclejed613's Avatar
 
Join Date: Dec 2006
is this for a class AB amp? don't waste your money... the only time something like this makes sense is with a tube amp or a SS amp with an output transformer, or a class A. you could easily "roll your own" anyway and save about $680.00.

the output impedance of most modern amps is well below 0.1 ohm, so using an impedance matching transformer doesn't make any sense. the device in question looks suspiciously like a standard toroid power transformer anyway, probably using the center tapped secondary as an autotransformer.

Last edited by unclejed613; 2nd June 2010 at 01:22 PM.
  Reply With Quote
Old 3rd June 2010, 12:03 AM   #8
diyAudio Member
 
Join Date: Oct 2007
Location: melbourne
i am curious about this product as i am using aleph 2 se amps to drive esl speakers and am about to convert them to aleph j

with the aleph j amps the distortion into 4 ohm loads is higher than 8 ohm
they also dont double their power into 4 or 2 ohms so the above product would help a lot for my setup

cheers
  Reply With Quote
Old 3rd June 2010, 12:20 AM   #10
diyAudio Member
 
Join Date: Nov 2008
EV, Altec and Rauland had EI-core matching transformers. As I recall the EV was called AT100 (for autotransformer 100W). E
  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
Best amp for hard loads - Aleph 0 or X350? Sony Pass Labs 6 25th October 2005 06:06 PM
Speccing power transformer for several speaker loads privateer Chip Amps 6 22nd June 2005 01:38 PM
? HT speaker loads and amp power 2Bit Multi-Way 2 8th January 2004 10:49 PM
Best amp choice for driving NASTY speaker loads stokessd Pass Labs 8 25th March 2003 11:32 PM
Question about Pass a40 and speaker loads Eric Pass Labs 14 24th April 2001 10:30 AM


New To Site? Need Help?

All times are GMT. The time now is 05:55 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