Well I can officially add to this thread with the same issue as Relham

Loud buzzing from 1 speaker when out of standby. Luckily these were very recently bought from a local PP who will be speaking to Meridian on the issue. Also luckily they have a warranty period with them!

My serial number is

DSP3200-201404

The suspicious thing is that it is less than 400 away from the OP serial..

Will update in due course. Has anyone else had this issue?

Regards
David