How do you download it from that site? the big DOWNLOAD buttons seem to want to download some DOC to PDF conversion. All I want is the schematic.
never mind, I found it on Nick's site:
it is probably the power amp oscillating for all it is worth, dragging the power supplies into the game in the process. A missing ground somewhere could also allow that. Oops, scratch that, it is a digital amplifier, so it may not be oscillating, but it sure is full of high frequency trash. Still could be grounding.