why is this thing humming?

I just hooked up my new mcintosh 207. I made sure the cables arent bundled and what not everything looks pretty clean. But this amp is humming something bad. I rehooked up my rotel 1095 no hum what soever. This is up setting since the reason I bought this amp was the Rotel was supposed to be the wink link. Please help I need my tunes up and going.