My Hegel H590 has a normal, cyclical, mechanical, ever so slight hum. In over 25 years in high end audio, I've never owned an amp, whether it be tube or SS, that didn't have some kind of a hum. Some hums extremely slight, and some more noticeable. With my Hegel H590, the barely noticeable humming sound cycles out after a few minutes.
Hegel hum?
Spent a week or two enjoying my new H400 and noticed a faint hum between the time I turn it on and before I play music. Also there when I pause after playing a while. Note that the hum is only apparent when I bring my ear a foot away from the amp. I’m quite pleased otherwise but am wondering if this is normal?