sound problem since 2010 after clutch repair
 

can someone tell me the model of the original head unit on hyundai tiburon GT 06 ?
The sound system has issues since a clutch repair job back in 2010 and is really bugging me lately since i cant figure it out figure more heads are better than one here so here was go
I have tried another unit and that one doesnt even work the display is scrambled on both the sound is weak and the volume control and other buttons do not work I am thinking the person who owned it before me maybe replaced the original with one from another car that is the wrong model as i know this will cause compatibility issues.. so that begs to ask people who have a 06 GT to come forward and let me know which model they have .. this has the infinity without the amp.. please help me out... thanks in advance
obtw VIN: KMHHN65F96U221789