AU1 Premium Sound

[Dunnie's Ghia]

Hi fellas,I'm new to the site and just blown away with all the info I've got from reading your threads

What I'm after is info anyone might have about the amp in Series 1 Ghia Premium sound. The back speakers and sub stopped working . I've tried to find a replacement s/hand one but no luck. Just like to know if his is a common problem and if it is repairable or just unplug it and get an aftermarket amp put in...Appreciate your input

Cheers, Dunnie