Audi A3 8L AMP, Subwoofer and Rear speakers problem

[CarlosMorynyos]

Hello guys, my rear speaker from audi a3 8l is not working and subwoofer sounds working somehow, on high volume subwoofer make a very small sound but don t blow. I try to find amp to solve it out but i don t find him.

How can i solve this problem? What you think about this problem? Maybe it s from the radio, an wire is not connected from subwoofer and rear speaker plug, but doesn t see it as a problem, i'm not sure about that, i want opinions. Please, help me! 🙏

Photos: https://postimg.cc/gallery/x8qCpXQ

[CarlosMorynyos]

Update: a photo with wiring https://postimg.cc/pyscNW5B this purple wire is not connected, when i connecting purple wire with yellow, on the front right speaker i hear a sound, but speaker works fine, this sound is for a ln moment, so i don t think the problem is from wiring from radio, i think the problem is to amplifier