Thanks Grtman for the response. Some more questions from me please due to my lack of experience with real amp and cabs :-)
If I understand you correctly in the Classic mode, all I am doing is changing the "Head" by choosing different modeling amps, but my "Cab" which is the 10' speaker built into the Spider V 60 is the static "Cab"? The ability to change the cab like I could do with a real head/cab combo is not possible with the Spider V (in classic mode)?
I also believe a real life 2 or 4 speaker Cabinet has no tweeter? Guitar typically fills the miid-range?
I understand what you mean with Full range mode, that both the amp model and cabinet model are engaged, but don't quite understand how the sound of a recorded (aka miked up) amp/cab combo (which is what you mention is being emulated) differs in sound compared to if you were standing in front of a combo in a room and playing? Simply don't have that experience.
Finally why is the tweeter included on the Spider V? It was not on the Spider IV. Simply to make the backing tracks sound better?
You mention emulating sound going through a PA speaker with a tweeter. Does a real guitar amp even produce sounds “high/trebly” enough to send anything through the tweeter?
Excuse what are probably many Noob type questions, but only started digging into this side of playing recently and is a science unto itself.....
Thanks