I just scored a used DSL100H and haven't stopped grinning for the past 1 week Anyway, after a week (playing 1-2 hours a day), yesterday I discovered that the ultra channel suddenly will start sounding 'clean' (even with the gain high up), and needs about 15-20 minutes before the gain gradually increases to its full normal self. But once it kicks in full, everything is perfect. Also, switching on the power alone for 20 minutes did not prevent this phenomena - I need to follow with switching the standby on for 20 minutes before the ultra channel gets 'normal'. May I know if there is something amiss, since before yesterday the ultra channel delivers the expected gain fully immediately after switching on standby following the prior 1-2 minutes switching on the power. (I did fiddle with the efx loop before this happened, but unsure if that is relevant). Thank you!