Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Subwoofer Isolation Transformer
Subwoofer Isolation Transformer
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
Thread Tools Search this Thread
Old 1st October 2018, 12:05 PM   #1
saf is offline saf  Portugal
diyAudio Member
Join Date: Sep 2009
Location: Porto
Default Subwoofer Isolation Transformer

I need to add a Isolation Transformer to the RCA input on my powered SUB.

These things commecially are quite costly, as the Jensen Transformer one.
Plus, i dont seem to find it here in Europe.

How can i build one ? Is this a simple CMC ? Or does it have more components?

The goal is to prevent burning the subwoofer amplifier, as it happened 2x already and it was not due to overloading or pushing it too loud. On disconnect i heard a loud "buzz" and then it went.
  Reply With Quote
Old 1st October 2018, 12:55 PM   #2
simon7000 is offline simon7000  United States
diyAudio Member
Join Date: Nov 2008
Location: Oakmont PA
Triad TY-146. Put a 2,200 ohm resistor across pins 5 and 8. That is the output to the subwoofer. Pins 1 and 4 are the input. Pins 1 and 5 are the shell contact. Put a jumper between pins 2 and 3. Another jumper between 6 and 7.
  Reply With Quote
Old 20th October 2018, 02:40 AM   #3
cacao ambiance is offline cacao ambiance  United Kingdom
diyAudio Member
Join Date: Oct 2015
what about this? i have them. not noticed much if any sub bass missing with these. not really done any proper testing.
HIFI Ground Loop Isolator for Audiophile Car Noise Filter-in Speaker Line from Automobiles & Motorcycles on Aliexpress.com | Alibaba Group

ive opened them up. they do have the fatter transformers in them. welded sealed so quite hard to break case open. nice feeling cable coming out of them.
  Reply With Quote


Subwoofer Isolation TransformerHide 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
Isolation transformer JOEJAZZMAN Power Supplies 4 23rd May 2016 09:48 PM
subwoofer isolation platforms SS4927 Subwoofers 3 26th March 2014 04:54 AM
Isolation transformer argonrepublic Power Supplies 1 30th July 2013 08:01 PM
Isolation Transformer A Sound Mind Power Supplies 17 23rd March 2013 10:27 AM
Newbie Question - Power Transformer vs Isolation Transformer SparkyPete Tubes / Valves 10 2nd November 2012 07:13 PM

New To Site? Need Help?

All times are GMT. The time now is 11:56 PM.

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