Why some amplifiers have low volume?

  • Hello! I have a question. I noticed that with some presets the output volume drops drastically. Even when using the "set": noise gate - amplifier - loudspeaker, some amplifiers have very low output volume. It is normal?
    My equipment is: laptop with Windows 10, BIAS FX2, Scarlett Solo 3gen., speakers Kurzweil KS-40A, guitar Ibanez GRG140.

    I compare the sound of my set with presentations on youtube and on the same preset the sound is completely different. Can a guitar change the sound that much?