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argonrepublic 16th December 2012 05:16 AM

Energy EW-100 Subwoofer transformer
I have a dead powered sub. The transformer is stamped
042-010078-000ZR. I have no idea what I need to repair or how to determine a value for replacement. Does anybody have a schematic? Can I repair this. There appears to be continuity in the primaries but no output. The amp is said to have 225 Watts secondaries are center tapped.

Richard Ellis 16th December 2012 06:06 AM

Look thruout the inside of the unit, use a decent magnifying glass...look very closely ... take lots of pictures, close-ups them here.Someone might have seen such an amp. Sometimes the amp section will have voltages written on the PCB coming in from the PS....EG. +35V -35V
It is a starting point at least...Klipsch will want to repair it for you of course$$...and surely wont tell you the specs on the transformer..nor is their likely a schematic easily available.

__________________________________________________ __________Rick...

Obrien 24th January 2013 01:42 PM

Energy EW-100 Subwoofer Transformer
did you ever find about the transformer voltages, etc? I have a Klipsch that has the exact same problem... an open winding in the power transformer.

Hazardsneon 23rd April 2015 04:31 PM

This post is very old, but I picked up the same sub on craigslist with issues and in my searches I came across this post.

I was unfortunate to find that the person that tried to fix it didn't know about the thermal fuse and, when prying at it, broke some turns on the transformer.

So, I hooked up my 4ohm load gave it a 1Vp-p sine wave on the input, injected +/- Voltage and increased until the output didn't clip. (I simplified this greatly).

Long story short, I found that a 48V 100VA center tapped transformer is needed to power this guy. Or this is at least what should be used to get the proper output.

Now I am on my search for an inexpensive transformer to suit the needs.

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