Technical Radio - Speaker/Tweeter Issue

[TommyMcMusic]

Hello all, bit of a odd problem, the passenger side front speaker and tweeter are not working, they just stopped all of a sudden, ive had the door card off and the contacts look fine, as do the speaker and tweeter themselves, they are never excessively loud so im at a loss as to what the problem may be or even how to diagnose it.

Any help would be greatly appreciated.