If you need some pretty cheap and equally shit car audio products JB have 20% off Sony Car audio for the weekend.
It's not great gear but a good install with shit gear will always be better than a shit install with good gear.

https://www.jbhifi.com.au/deals/car-...at-morning-edm


https://www.jbhifi.com.au/deals/car-...at-morning-edm