Hello colleagues, I am checking a 1200w HIFONICS amplifier, they brought it to me because it gives a distorted or very sharp volume, it is not clear or loud, I do not know if it is because I am testing it with a 5 ampers source. I am testing and I am checking The mosfet transistors and when removing one from each side and apparently they are good, it does not protect itself only if it is heard very low, it seems that nothing is damaged or inflated as capacitors brings us dual amplifiers with a license plate CHN 4558 C and the potentiometers also go up and They bring 2 modules as cards, but I do not have much experience in this type of amplifier, some guidance that will help me to repair it, I would appreciate it