guitar to grandmother loud sound in the back

Hi, I bought an AC booster pedal to plug in my grandmother because apprently its normal to have a weak sound when you plug ta guitar, problem is that I cant have a loud sound fro the guitar without having a constant “noise sound”, sorry if I am unclear, but I don’t know if its the pedal or the synth or me simply the problem, Ive been recommanded this AC booster, but if anyone knows theres some better gears to make it work or any technic, that s su0per cwecome, will appreciate any suggestions , thank you

maybe try one of the re-amp pedals, that generates a line level signal?

or the H&K red box may work well too: it takes a line signal from the speaker out, I believe

ok , gonna do some search in that direction, I didn t know how to name it, this line level signal, thank you!

welcome!!

if your amp has a line out, that may work too