plan-x said:
I would think that the G system can mix the wetness internally and work just fine with the pig.
Yes, of course. In fact, most processors, even pedals can. To talk a bit more about the parallel vs. series issue: the main difference here is that the mix is digital, while on a parallel loop, the mix is analog. The disadvantage of a digital mix is simply the fact that ALL of the signal goes through the A/D D/A converters. Of course, a mix is a mix, but with a parallel loop the original dry signal remains pure and untouched, as if you never used the loop. In fact, when your amp has a parallel loop, it doesn't matter if it's in use or not, as far as your tone is concerned. Some people just don't like having the tone from their analog tube boutique amp going through digital conversion, which I completely understand, because there IS a difference, just not all people hear it or are bothered with it. As everything else, the quality of A/D D/A conversion varies a lot. On cheaper units, the conversion is poor, which is exactly where a parallel loop is most beneficial. However, when you start to go high-end Eventide or Lexicon, the difference is really barely noticeable. I did notice a difference when I ran my Eventide Eclipse in the loop of my Lonestar, though (even with the processors bypassed).
In fact, this whole thing has even led to Wet/Dry/Wet-systems, which we all know well around here. My take on these is simply that they are somewhat unnecessary, as you can achieve the exact same results by running a parallel effects setup (mentioned earlier). Some just don't like the effects and dry tone to mix at all, not even in the power section, so they keep them separate all the way to the speakers in the signal chain. However, they are going to "mix" eventually anyway (in the room), so I personally think a simple stereo setup with parallel effects would do just fine. Apparently John Petrucci does think so as well.
Now to get back on topic!
Yes, the G-system will work just fine with your Lonestar! Never used it myself, though...