Just for a test, before I do anything else as previously suggested I ran a new molex from the speaker out on sound board with new wires straight out of backbox a couple of metres to speaker sitting well away from machine. No different.
So I guess this eliminates noise introduced from loom and speakers being next to DMD.....
I just found the bulletin you were refering to Nino too.
http://www.sternpinball.com/downloads/sb133.pdfI have no idea whether this would work on a D.E Soundboard for LAH. I would defer to the experts on that one.
