Still related to the sound quality for BIAB live experience ......

In fact, my question can be summurized to the following : "why the sound delivered on a stage amplifier is different of the one i get directly from the speackers i have on my PC"?

Perhaps my question looks a little bit stupid but, the feeling i get from my PC at home (via my ordinary powered speakers) is very good while the one i get on a stage amplifier is very banal ... Some ideas ?

Thank you in advance for your comments,

Merci

Daniel