Last time got KF audio at Aman Suria, but already closed shop after covid, owner retired.

E_A autoworks near bukit jalil i hear is generally good worksmanship, but price on the high side, and sometimes installation hit and miss depends on customer. I've havent been there yet (might be going soon).

Maybe someone can vouch for E_A haha. Else i think not many more pro install shops worth mention, all also half-past-six workmanship and expertise...