Question about RME Intelligent Audio Solutions RME Hammerfall DSP RPM Phono/Line I/O -Mac/Win- : PCI-Based Audio I/O Sound Card

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Buzzing sound in my speakers when I switch to the phono stage

I get buzzing sound in my speakers when I switch to the phono stage on my receiver. I noticed that it is related to the dimmer switch controlling the track lighting in my living room. When I turn off the lights buzzing sound disappears. Right now I plugged my turntable into the contact furthest away from the dimmer, it helps but the buzzing sound is still there. Is there a piece of equipment that will eliminate the problem.
Please advise. Thank you.

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  • mkstudios Dec 29, 2008

    thank you very much I will try it.

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  • 146 Answers

It is a grounding issue with the turntable most likely. Some turntables came with a ground wire that you attached to the receiver. You can also try a power strip that has a line filter incorporated to get rid of the hum. Check the local stereo shoppe to see if they carry them.
You may also want to replace the audio cable that connects the turntable to the amp with a good quality shielded cable. If it has bad shielding it will pick up electrical interference and even radio interference as well.
Turntable inputs on receivers have a preamp built in and the gain for each type of pickup is different. The pickup is either ceramic or magnetic and if I remember correctly, the ceramic pickup needed more gain than the magnetic one. The preamp will definitely make a ground hum a lot more audible.

Cheers and good luck.

Posted on Dec 27, 2008

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