according to the magnificant Ranier Lichte in his marvelous book, more radio
receivers chance or choice, says this about the B600:

"has below average performance on SW"
"in a hurry to market a competitive receiver"
"a proplerly handled 2010 is vastly superior"
"even the R-600 performed better"
he says the filter are POOR
uncanny amount of images (on shortwave)

so the 600 is at this point in time only for collectors, and that is why it
sells for such high prices (usually over $300)