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Old 30th November 2012, 06:39 AM   #1
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Join Date: Feb 2011
Default xlr to pnono adaptor

Hi and thanks for reading this post.

I just purchased a hrt music streamer pro usb dac to connect my pc to my amp.

The hrt has output via 3pin xlr and my quad 405-3 amp has input via phono so i used a mini xlr to phono adaptor..

Immediatly upon plugging in the hrt i heard a loud buzzing sound which fades after the first 10 seconds, this has never happened before but it now happens every time even when the amp is totally disconnected and i am trying to find out why it keeps doing this.

I contacted David from net audio who makes the 405-3's who said it sounds like the bridge rectifier is damaged and it is charging the power supply smoothing capacitors at different rates.

I don't know as the capacitors and bridge rectifier are brand new and i choose really high quality vishay units so find it hard to believe they have failed so early.

The mini xlr phono adaptor connects pin 1 and 3 of the xlr to the outer screened cable to the phono and pin 2 is hot.

Do you think it is okay to use these adaptors or are there any compatibility issues as some people do not connect the drain wire.

Many thanks in advance. John.
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