Sound problem (Possible electrical issue)

I live in Argentina. 220v with 50hz.

I am seeing some issues with my guitar setup, which is not coming from the guitars itself I believe.

I have a bunch of majesty musicman guitars, some ibanez, a Kiesel and an aristides.

The problem is that the gain (not the volume), whenever I plugin to my audio interface or quad cortex or axe fx 3 is particularly low. These are high output guitars so I don’t think I should be pumping up the input gain. I am tickling the red everywhere, but the GAIN is lacking, not volume.

What I find weird is that I can hear the guitar coming through using plugins when I have the volume all the way down, but when I plug the guitar directly to an amp the volume knob works perfectly. (I have checked that I don’t have any other input enabled)

One of the things I figured out on the majesty’s is that the magnetic volume without the push-push boost is half the volume of the piezo. I figured they should probably be the same volume?

Also the volume dynamics when rolling the volume knob, using the amp is perfect and using QC/AxeFX 3 or neural dsp plugins is really shitty.

The best that I can think of is that I have an electrical problem somehow.

My guitar setup is:

Guitar → UAD Apollo x4 → KRK Rokit 6 speakers
Guitar → Axe FX 3 → KRK Rokit 6 speakers
Guitar → Quad Cortex → KRK Rokit 6 Speakers
Guitar → Axe FX 3 or Quad Cortex → UAD Apollo x4 → KRK Rokit 6 Speakers
Guitar → 15Watt Marshall Amp (Which makes every guitar work perfect and no problems what so ever)