As was all ready said setup is real important with this unit and very easy to make a mistake.
So I’m going to assume you got that and go on to other stuff. My first question is what cables are you using are they of high quality? Next how long are the cable runs, really just concerned with (GSP > Amp INPUT) (Preamp OUT > GSP IN)(GSP> Power Amp IN). Even good cables if the runs are long you will notice a bit of a difference with your tone. Come to think of it take a 25’ cord and plug it into your effects loop with no processor in between, bet you will hear a little difference.
Next question, when you say.
TractorTom said:
Got good sounds but amp sounds a bit thin, really not much but enough to notice.
Let’s put it like this: first I know you hear a difference but you are probably sitting in front of the amp A/B ing the processor in and out. If you walked into a room with your amp but could not see the amp and I set it up, do you still think you could tell the difference. I ask this because when sitting in front and A/B ing you will most likely hear some difference (just cause of cabling alone).
Now on to your loop, so you have a parallel loop and you have it cranked to 100% in theory now a series, cool!
Try some experiments it may not solve your problems and give you a perfect world but if you understand what is the week link you can work around to some degree.
Try this: plug guitar straight into the amp for now.
How does this alter the tone?
Next go to the effects level on the GSP and turn it to “0”, then play the guitar a bit while turning your loop mix on the amp back and forth from 0-100 do it on a clean channel.
How does this alter the tone? (I kind of think this will be the problem area)
If this is the problem area try a straight cable in the loop. And do the same thing as above. For this experiment use the same length of cable or better so if you used two 5’ to link in the processor use a 10’ or better cable
How does this alter the tone?
If the loop being maxed at 100% is what is altering your tone more so than the processor or the cabling you will have to set up for parallel use.
Above I had kind of suggested your tone loss might be the loop I’m only thinking this because I have heard of people with parallel loops having the amp modded to series. A complaint of just cranking the mix 100% just does not cut it for some people. Key word here being “some”