I have in my car two amp, A kicker 1500.1 and a kicker 850.4, before 2 days ago I used to have a kicker 850.2 and the kicker 850.4. So, I just replaced the 850.2 for the 1500.1.
I didn't add anything else, same wired, same everything. But my problem is when I start the radio with engine off only battery, the 1500.1 goes on protection mode. But if I start the car engine the 1500.1 start like no problem.
I did a voltage test to the amp, while the engine is off, and my voltage is 12.7v, with engine on 14.3v.
I did all the test to verify what's going on. I plugged only the 1500.1 amp to the positive, ground and remote, not speakers or RCA, and it keeps doing the same.