Subwoofer Isolation Transformer

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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.
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.