I have a pair of beolab 6000s hooked up to an old sears turntable/cassette player combo thing, and they both have a constant hum whether or not any music is playing. Changing the l/r balance does not affect the hum at all, but raising the volume raises the hum as well. The hum persists when the volume is entirely off. If i unplug the cable from the turntable the hum gets louder, and if i disconnect it from the speakers they go dead silent. I would assume its rf interference or something, but i have a pair of shielded cables and they do the same. When connected to my other setup with the powerlink connector the hum is gone, but since that turntable has no needle i have to use this one for now. The woofers also make a hum/rattle noise at high volumes or at higher notes. I would also suspect a ground loop also, but none of the power cables have a ground prong on them.
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Beolab 6000 speakers humming
Hi
I am writing from Denmark
You are wrinting that You have no problems with Power Link. This means that You have af "Ground" issue. In the PL cable Pin 2(Two) is making a ground connection between BL and the BM/BS. The humming You hear is the 50 Hz from the powersupply from your non B&O equipment. This because the 50 Hz humming is not supressed in your non B&O equipment. Your non B&O Equipment will properly have an earth / or Ground screw on the rear close to the panel. You will need a RCA (Phono) plug with an auxillery ground wire. This aux wire You will have to connect to the ground screw to your non B&O equipment.. Then the humming is gone.
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