maaari mo rin i-try to sir kun kaya mo i-stretch ng bahagya budget mo

seps : Crystal csc60 (bang for the buck though not sure sa exact model)
naka audition na ko nito ganda ng tunog kaso nakabili na ko ng infinity
seps pasadya ka na lan ng lagayan para dito usually fiberglass
amp : Fenton 2500 will do or any amp na may enough power to properly level
match sa seps
sub : targa panalo na rin to for budget setup tapos gamitan mo ng ported box
amp : any amp will do basta may sufficient power kun may makita kang kahit 2nd
hand mono amp panalo yun check mo lan kun may remote bass contoller

i agree with flakez no need for coax.