my fellow tsikoteers...please help...i just bought a second hand mazda car..with stock audio setup, gusto ko sana mejo maayos ayos ang setup ng audio...pero sa ngaun..budget ko plang is around.... 15k - 20k, may marecommend b kayo n shop...or audio items for setup..n pasok sa budget ko..your replies....will be a big help..thank you very much..

God Speed to all of you tsikoteers...