Make sure that the snare strainer is centered to the drumhead. Also make sure that the strainer's straps/strings are tightened and mounted properly to its strainer mechanism & butt end.
In regards sa tunog lata na snare sound... I think it depends on the snare drum's sound character itself. With the 'clang' sound described, I have the impression that this is a metal-shelled drum. Mr. autoexec, what snare drum brand and model are you using? And what drumheads are you using?