The Mégane II Owners' Club

Recently my speakers decided to go fuzzy when I use my aux input. However when I switch to the radio, the speakers work fine.
It can't be the aux cable because I bought a new one and fitted the cable and the problem persisted...

I think it may be the radio units sockets in the back which could have fried somehow.

Just wanted a second opinion, not sure whether it's worth buying a new radio if thats not the problem.

Renault Megane CC 2005 1.6l manual

Try a different input sauce(MP3player) could be a poor of over amplified recording-mine sometimes goes like it on the USB input don't crank it up so much and see if it's clearer.