guess i'm the latest member of studio 6? i've ordered it last week from the local dealer and received it yesterday.
i've heard some hum, from my t5p to signature pro. a little less hum from my hd800. it was much more noticeable when i first turned it on. maybe/can be completely gone with more hours? i had it on, on and off, for , like 10 hours maybe. i don't think it's the tubes. i've heard bad tubes before. i can try later. i really have some spares tubes.