Bam!! Mark V in the house and I am loving it. This thing is all that I had hoped for. 10 watts and 45 watts do bedroom volume really well. Been saving for this for a long long time. Anyway, lots of questions coming up. When I was testing this at the store, the clerk connected the speaker to the tuner output and I was wondering for a few minutes on WHY THE HELL was it sounding like crap. I was able to figure out that he had connected the speaker to the wrong output.I played it for about an hour after connecting it to the right speaker out and didnt find any issues but do you think that would have harmed the amp any way ? I had the toughest time getting the footswitch to work. I had set the channel select to fs but except for mute, nothing worked. It finally started working after setting loop assign to fs and channel select to fs. I can understand the channel select being set to fs should have worked but I had to set the loop assign to fs also. Is this normal ? This is my first tube amp and I a have few questions for you guys. I am using a 16ohms (2x12 V30s) connected from the 8 ohms out, the manual says that its a safe mismatch but also says that tube life could be compromised if the impedence is not matched. Could anyone care to venture a guess as to how much tube life I'd be losing ? Whats the avg life I can expect from these Mesa tubes? The manual says that the 2 pairs of power tubes are biased differently. If I need to change the power tubes, how should I go about things ? Do I need to change both pairs ? 1 pair ? How should I select the power tubes ? Apologize for dumping so many questions but I am really excited and a bit scared at the same time that I dont screw up anything on this thing. Last but not the least, I would like to thank all the guys who cared to comments and share their input on the Mark V thread I started some time back - http://www.sevenstring.org/forum/ge...those-threads-should-i-really-get-mark-v.html I know the Mini mark is here but I knew that I would never be satisfied with it. You want big bottles, get big bottles. LOL! Cheers !!