Looking for some help getting rid of some hum. Offending component would seem to be my Audiolab 8000 transport, which when on induces speaker hum through my Dino pre amp which is sitting directly on the transport. The Transport is on the lower shelf of a wall mounted Target twin shelf turnable bracket.

I like to keep the DINO on, but when playing the CD I get this hum.

I have put a granite chopping board in between the 2 and this seems to have reduced it. Any ideas as to what else I can do, apart from fix another shelf for the DINO far enough away so as to lose the hum?

thanks in advance