I have a question for anyone that can help. I have 2020 Honda Accord ex. I recently in past months upgraded the door speakers and the rear speakers. There was no upgraded in touching the head unit at all kept the factory radio.

- then a subwoofer was installed with its individual amp for it nothing big and a converter was connect for the rear speakers in order for sub to work with rear speakers.

- still no tampering with the headunit at all. Recently i ran through a situation where music would be playing and the rear speakers would give out and you wouldn't hear anything other than the front two speakers that eventually will give out. I then proceeded to disconnext sub from rear speakers and left it disconnected and it has done it again to eventually all speakers go out and the radio you can see is still playing. The installer has double checked everything thinking loosing wire or bad wires and nothing. He finally said the radio amp being faulty and may need replaced.