"Cabinet modeling", activated or deactivated?

But if a play in live shows with amp and cabinet Block in axe fx and also put ON cabinet modelling have 2 cab simulator, don´t undertand.
If you turn off cab modeling, that disables every Cab block in every preset. When you turn on cab modeling, that allows the cab blocks to work.
 
Whenever you are playing through a real cab, you do not need cab modelling.

Wherever you are not playing through a real cab, you do need cab modelling.

Cab modelling imitates a cab. You need it on when you are playing through something that isn't a cab, like headphones or FOH or an FRFR speaker.
 
Just to be clear, when anyone here mentions "cabinet", or "real cab", they actually mean a real guitar amplifier cabinet. This would be something like a Marshall 1960A, or something that says "Fender", or "Vox" on the front, and is intended to be attached to a guitar amplifier.

This does not include general purpose speaker cabinets such as studio monitors, PA systems, or wedge monitors. Essentially, anything designed to faithfully reproduce a full range of sound in a transparent and high fidelity fashion is not a "guitar cabinet", and does not count when people here refer to using a "real cabinet".

The "cabinets on" option in the AxeFX turns on the cabinet modelling. This allows the unit to emulate the colouring of the sound that a real guitar cabinet would produce. If you are actually using a real physical guitar cabinet attached to your AxeFX, then you do not need to use this emulation and you should turn this off. If you are using any kind of speaker that you would generally use to listen to something like a YouTube video, you should turn it on, and include a "Cab" block in your preset.
 
Best way is to use both outputs.
One with Fx-Loop bloc without cab-bloc to your neutral amp + standard guitar cabinet
The other to out with cab-bloc for FOH
In this case, cab-sim always ON
 
But wait, there's more:

If you are using a real tube power amp with a real cab, you also need to turn off power amp modelling, and cab modelling.
If you are using a solid state amp, you have to set the "speaker" page in the amp block, by ear, manually, to fit your cab,
Either way, when using a real cab, turning off or lowering speaker compression will probably sound better.
 
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