Pass X150 power down Thump solution = Jensen Isomax (RCA to XLR converter)?? - diyAudio
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Old 6th October 2007, 06:45 AM   #1
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Default Pass X150 power down Thump solution = Jensen Isomax (RCA to XLR converter)??

Hello all,

Further to the previous thread about my Pass Labs X150's power down thump, I am thinking to use a Jensen Isomax to convert the RCA to balanced XLR. It is an expensive transformer indeed about $200. I don't know if it is a worthwhile solution for the problem. ALso, is it going to degrade the audio signal, my biggest concern?

Btw, my X150 has no more power down thump if I connect my cd player directly to the amp. I figure it is the DC from my denon causing the problem. I think my X150 is the early production which doesn't have capacitors on the input to prevent DC offset from upstream.

Thanks all


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Old 6th October 2007, 07:11 AM   #2
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Why not just put a couple caps at the input and see if it solves your problem? You probably won't even hear it if you use decent ones.

edit: You might still have a small pop but it should be harmless, assuming it's DC that is the issue......
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Old 10th October 2007, 01:21 PM   #3
dejanm is offline dejanm  Austria
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Transformer is better solution than cap for coupling (especially if it is comming from Jensen), but it is also more expensive.
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Old 10th October 2007, 10:45 PM   #4
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Jensen makes a very fine transformer. Using it provides a
DC connection to ground that you probably were missing.

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