Hi my name is Dan and I just got a B & O Beogram RX2 and I am troubled by whit I think is rumble .
Any adj. I can do myself ?
Thanks DAn

It's not sitting on the speakers? Try to Isolate.

No it is not sitting on top of the speakers
v2dan thanks

Is this for most? All music? Especially Lower frequencies.
Polarity of speakers OK? + to +, - to -?

Separate units? Check that all units are earthed, its possible mains hum