Fullback Audio Failure

I understand you're experiencing a complete loss of audio output in your Fiat Fullback. Did this occur suddenly, or did you notice any degradation in sound quality beforehand? Has the vehicle had any recent work done that may have involved the audio system wiring? It's possible a connector has come loose. Can you confirm the head unit is displaying as if it is playing audio, and the volume is not set to zero?

No sound degradation beforehand, it just suddenly stopped working. No recent work done either. And yes, the head unit displays everything normally, like it's playing, and the volume is definitely not on zero. I'm wondering if it could be a defective bass speaker or some kind of amplifier issue?

Given the sudden failure and the fact the head unit seems to be functioning normally, a defective bass speaker is a distinct possibility, as this could cause the whole system to shut down as a protection measure. However, diagnosing this properly would necessitate a thorough inspection with diagnostic tools. I'd recommend visiting a qualified workshop to have them perform a comprehensive system check.

I took it to the workshop and turns out the bass speaker was indeed the culprit. Replaced it, and everything is back up and running now. Cost me 280€, but at least I have my tunes back!