Kenwood KAC-9152D Car Audio Amplifier "groundwire" Questions

my amp has power but no sound will come out of my subs i've checked the groundwire, powerwire and remote wire and all of them are fine Hi. I just had a thought that you should check your RCA wires

two vasonik amps turn on and the sony amps wont (all i did was switch the wires over) whats the deal I had two vasonik amps in the car and both of them worked fine. But I decided to put the sony amps ...

...on again. what do i do? Check to see if your rca and ground cable is connected good. find a better groundwire homie your other prob could also be the led light that is a problem that i found on amps ...

...everything the amps power light won't turn on. I double checked the remote signal wire and the groundwire any suggestions? check the fuses in the amp if it has any then check your ground make ...