I just wanted to share some of my experiences (and frustrations) when using the JTV. I have done some tweaking in workbench and the guitar is now a dream; if you spend some time with this guitar it really is a work of genius and incredibly playable/musical.
Here is what I did:
Set each presets' string volume: I did this not using the global string volume but the string tab for each preset. It took some time but it was worth it. Prior to doing this I found on many of the presets some of the strings were thin and others were too 'present'. In many cases the string volumes were out by a significant degree eg 50 50 50 100 80 100. In most cases I found my top E string was the quietest and weakest sounding in each preset. It seems strange that the individual string volumes were so far out, you think they would nail this in the factory!
I then boosted the preset volume by between 3-6db for to compensate for string volume reductions
I also - in also most every preset - increased the pickup level by between 3-6 db for each preset pick up.
I tried to get the levels roughly the same between presets, as for me I find this much more musical - prior to doing my level tweaking I found the models with lower volume less appealing. Now I have levelled each preset out some of my favourite models are the ones that I 'skipped' prior to the above.
If you are not happy with your JTV I would strongly suggest doing some of the above. I was about to get rid of my JTV but now I absolutely love it and can't put it down. The models shine through much better now and there is no longer the frustration of playing 'thin sounding' strings on many of the models.
I now need to find a decent amp for the guitar - currently i'm using headphones, but previously I have played it through 'normal amps' and been v disappointed. I haven't tried it through an amp since doing my volume/pick up tweaking so it might sound alright now. Has anyone got any suggestions for amplification?