Speakers intermittently stop working

keep_hope_alive said:

The Android based head units have very questionable build quality (I have one in my basement).  It certainly could be connections - did you solder and heat shrink any connections you've made?  What connections did you make?  Is it temperature dependent?  Is the rest of the vehicle stock?

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No soldering or heat shrinking was needed, everything just plugged in.

I am guessing the chunky cable that seems to be going behind the steering wheel assembly came with the car when I bought it from the previous owner. When I bought this new head unit, I needed to buy a Peugeot/Citroen ISO Harness Adaptor (I got the Connects2 CT20PE02) to be able to connect the head unit to the "chunky cable". The previous head unit came with its own adaptor as it was designed for the Peugeot 308.

I know that there are three cables coming from the subwoofer:

1. One goes straight onto the car battery.
   
2. Another is an RCA-to-RCA cable that goes to the 'subwoofer' RCA port on the head unit.
   
3. The final goes to the 'auto ant' on the head unit, to turn the subwoofer on when the head unit is powered up.
   

Whoever owned the car before me installed the Focal 2-Way IFP 207 speaker system.

I bought a Pioneer MVH-A200VBT (£130) today and installed it.

Driving to some shops (20 minutes away), everything was fine.

After shopping, I turned the engine on and had the same familiar fault - could only hear the subwoofer.

After a few seconds, the head unit started to flash: AMP Error.

So it wasn't an issue with the Chinese Android-based head units after all

Does this help you, perhaps, narrow down what the issue could be and how I could go about fixing it?