It is normal for a buzz to result if the amp is on and connected to a preamp which is off.
The preamp of course should be turned on first, this to avoid damaging the loudspeakers should there be a turn-on thump.
If the buzz is then so quiet as to only be audible when your ear is pressed to the drivers of the loudspeaker, it simply is not a problem!
The preamp of course should be turned on first, this to avoid damaging the loudspeakers should there be a turn-on thump.
If the buzz is then so quiet as to only be audible when your ear is pressed to the drivers of the loudspeaker, it simply is not a problem!