just get a HU 1st then
avoid install anything in brothers
and buying component set/woofer etc from them

the speakers are mostly imitation
some member here kena .... bought it...rosa...go back authorised service shop repair....then oni know it's imitation

installation is crap
the installer know nuts about wiring/electronics...screw up my car's wiring just to change a bulb
after sales service is same crap...
the one that u bought the stuff will be gone missing the next day