My pair of S3601 came in and now have a quad I can try on my RSA Apache. When I took out the V5s, I found 1 of the wires on the extension legs had broke. It had not died but just touched enough to work.
With no burn in the spaciousness of the music has increased by a significant amount. The female vocals are intimate on Karrin Allyson's "footprints".
Time to just kick back and listen.