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You say "old" USA tubes.If by old you mean used,then I would have to say the tubes were at or very near the end of their useful lives The tubes that appeared to be causing the problem are fine when I put them another amp so I know they aren't at the end of their useful life. It doesn't make...

Hi, I have tried putting some old USA tubes like Sylvania, GE, RCA in different preamp positions on my '92 Caliber 50+ head. It sounds better but after a while it starts cutting out and signal/sound goes to 1/2 power or dies completely. I put new production tubes back in and the problem goes...

Hi, where are you located? Im near boston MA 01950

I have a question about ISP placement. Since the thread originator mentioned he plugs directly into the amp, would you recommend he use the ISP in the loop or in front of the amp? thanks Drew

wow, This is my first Mesa amp, so very cool to hear some insight into the more in depth reasons for these channel differences. I am not an amp tech, but you guys explained it in ways that do make sense to a circuit novice. Thanks

thanks cscotto. 2nd channel is the 'hugest rock sound' for sure.....too much rock for one hand....you have to use two hands together just to describe it \m/ \m/ wow, that was a cheesy, I must be slap happy.

@hback, thanks, I was using the pictures as the 'Speakers' part of the manual did not seem clear to me. They do not show a single 4ohm tap to 4ohm cab connection in the pictures. I trust you though that it is safe and I will proceed doing it that way then. @MrMarkIII, actually I don't think...

thanks for the reply, I am very relieved that others experienced this, then I would wager mine is not defective. I was going to take it to a tech, but I think I'll just learn to live with it as likely nothing could be done about it, it sounds like the way it was designed. I read the manual I...

Hi, I am new to the boards also, and recently picked up a nomad 100 head. I think it does metal very well, but I have to use an overdrive pedal to get there. It is not that the amp does not have enough gain, because it does...the gain just needs a crisp overdrive pedal to make it tight and...

On a Nomad 100, there are two 4ohm outputs, and in parenthesis it says something like 'for running two 8ohm cabs'. This leads me to believe it may only be safe to use BOTH 4ohm outs and not just one. Is it safe to just use one of the 4ohm outs? Like hooking one 4ohm output to one four ohm cab...

Has any other Nomad user experienced drastic differences in the volumes for the 2nd and 3rd channel? I realize that there are big jumps in volume when switching between channel modes, like when on the second channel going from vintage to modern setting. However what I'm referring to is the...