Does the manual state anything about 'class A' operation? I know their manuals are a little weak.
I would email them direct, to know for sure. They are very responsive and I've emailed with Gilles Belot back and forth many times. Great guy, great product!
I've owned the Fog CDP, Nanda preamp and Mea monoblocks, but never the 4808 so I can't help with markings on the unit. Sorry.