Hey jimnastic, interesting conundrum. You have lots of variables going on and each will make difference (some more than others). BTW have you tried the MP2 CC macros yet ? I haven't but next on my explore list when I have some time...So I'm assuming you have the Lex in the MP2 loop ? then cab sim outs to poweramp ? I run 3 different ways (but always mixer for Fx send/return, though the MP2 loop does much the same for 1 Fx):
1. - Live I use MP2 stage outs > desk (mix in Fx) > poweramp (currently Carvin DCM 200L, but also Carvin all tube TS100 and previously B200s) > stereo wired split stack or 2 split stacks (so 2 x 12" ADA cabs)
2. - Or MP2 cab sim outs > desk (mix in Fx) > poweramp (currently Carvin DCM 200L, but also Carvin all tube TS100 and previously B200s) > Messa P112 (12 + horn) bass cabs
3. - Or MP2 > desk (mix in Fx) > studio monitors.
The MP2 does sound much more processed than the MP1 (not as raw, I used MP1 set up as option 1. above for many years). The cab sim outs do sound a "bit" processed direct to studio set up. I changed to the 2 x 12 setting (rather than 4 x 12 sealed) and it seemed to open it up a bit (for me). Some of this is volume I suspect. When you get to stage volume everything changes (allot) as the dynamic range is so much broader.
Typically Fx returns shouldn't stuff your sound, they are usually in the circuit just before the poweramp stage (but not always, you need to check the schematic).But your kind of combining apples and oranges here (not that you shouldn't
).The signal going back into the Jet City returns is not cab simmed (as you know) so should have plenty of tops and clarity.. unless you have adjusted your patches to suit the cab sim outs into the full range setup (which I imagine you have
), and not necessarily at very loud stage volumes ? Thus less tops and sparkle ?
Try just the stage out Jet setup and make a patch(s) that brings it alive (add tops, presence, room Eq etc) and crank it up loud.Then check how that patch plays out with just full range cab sim option (try 2 x 12" setting)Then combine both.
What is the 300w quad SS amp you are using ? and what full range cabs ?? they will also make a difference to the tone, and again at what volume ?? as you raise the volume the dynamic range increases, the difference between softer and louder sounds is much wider (and less processed sounding). MP1 and MP2 patches are best created at stage vol and then turned down when required... Anyway my 2 cents