I had a 350 & now the 350.5. They both took 250 to 300 hours. The .5 was the shorter of the 2. In my experience they take you on a bit of a roller coaster ride, great one day, bad the next until the break in. But they will in time. Be patient.
Pass Labs 350.5 or 600.5 owners--breakin time.....
I just bought a pair of Pass Labs 600.5 monoblocks which now have about 25 hours playing time on them. They are starting to finally open up in the upper registers and in detail. Still kind of veiled though... They sound better after 4+ hours of play. Could anyone comment on the total breakin time and what they may sound like after say 100 hours? Thanks! Stan