Yes. I have a MKII and a MKIIa. The MKII exhibits TERRIBLE alternator whine from the analog outputs no matter what I do. The MKIIa exhibits no alternator whine, but I get very odd IDE hard drive noise which is choppy and clicky and very hard to describe, but it does not sound like standard analog interference. If I unplug the sled and plug my phone directly into the RCA cables, no noise at all. Just sounds great. Clearly the problem is with the empeg.

I bought one of your digital sound cards Stu, but I haven't gotten a chance to install it yet. My MKIIa just died the other day, so now I've got no empeg which has a palatable noise floor. Sad day.