Not all 3 have same issue. Was just giving an example of the issues
Each one has its own issue
Yes I did replace rca cables and swapped left and right to comfirm is was an output issue
Looking for someone to repair them
I have 3 amps that need repaired
Kx800.4, Kx600.4, Kx300.4
All come on and play but have a buzzing, left channel comes and goes and a RCA input issue seems if I wiggle the connection in n out it plays fine for a moment