Possible head unit issue

[Ruben 0]

So i got a double din installed on my car and after about a month my system would just randomly turn off(headunit would power off and same with subs and amp) it did it once then would reboot. I took it in they changed the wire harness and the ground. It fixed it for about 2 days i then decided to change my negative battery cable and that fixed it for a few months and then it came back and i noticed that with the head unit turned off that there was a bass note from the subs playing real faint until i turn the bass knob it gets louder. What could be the issue on why my head unit turns off by its self faulty head unit, bad amp need help asap.

[///M5 2,833]

I'd recheck your wiring.  Sounds like your "fixes" jostled something that actually did the fixing.

[Ruben 0]

I had it all done at a shop they tried fixing it by first replacing the harness then moving the head unit ground to the ignition that didnt fix it but when i changed my neg. Battery cable in the engine bay it fixed it for a while i have a feeling its the head unit because i had the rest of the system hooked up before hand and didnt have any issues with the stereo doing that with the stock unit