Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Discussion Meridian - Systems 3200 loud constant buzz

That's the transformers humming. they all do it, but some are louder than others. My DSW made an intolerable hum from the backplate, but a DC blocker, some judicious tightening of the transformer bolt and a bit of compliance in the mounting of the backplate has reduced it to inaudible except when the room is "middle of the night" quiet. Nothing else I own has an issue with my mains supply, so I'll need to investigate further, but the transformer in the DSW is pretty marginal for the power rating, so it could be just more susceptible to an issue that everything else ignores.

My 3200s and 3300 are mechanically silent unless you press your ear to them. The results, as others have noted can be dependent on how the backplate is placed in the cabinet and the tightness of the retaining bolts. It's worth doing a bit of non - invasive trial and error to see if you can reduce it.