Re: JP-2C – John Petrucci Signature Mark IIC+ Official Demo
Since Petrucci rarely uses his bridge pickup for lead playing, I think the scooped tone helps stop the neck pickup from going too honky. An Air Norton (or whatever his signature pickup is these days!) can get muddy quickly with too many mids.
That said, I've owned a TriAxis and the mids are very, very pronounced, the v shape EQ just helps add a little bite to the top end while stopping the mids getting too carried away. The Mark amps are a little odd when it comes to tweaking, they're not quite as easy to use as other amps (there's a great Petrucci video where he really explains the Mark series controls and how he uses them).
I've been keen on getting a Mark V:25 for a few months, but I have to say I quite like the idea of having two lead channels with an EQ on each - that said, I could probably just do the same thing with a single lead channel and a boost pedal.
The MIDI switching is a big deal though. It's one of the killer features of my old JVM and the Legacy III and it's about time Mesa put it on a Mark amp.