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Subwoofer Isolation Transformer
Subwoofer Isolation Transformer
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Old 1st October 2018, 12:05 PM   #1
saf is offline saf  Portugal
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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.
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Old 1st October 2018, 12:55 PM   #2
simon7000 is offline simon7000  United States
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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.
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Old 20th October 2018, 02:40 AM   #3
cacao ambiance is offline cacao ambiance  United Kingdom
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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.
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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.
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