He invested pretty much on speakers, woofers & the CD player itself: the pretty colours, the 'booms' & 'bangs' which he termed as 'shiok' & 'high level life enjoyment'. I'm not the expert though. I wish I know all the terms & equipments but he didn't tell me much except to appreciate the awesome music & pretty lights while we're on the road.
He knew I love dolphins, and once he bought a CD player with a screen which had dolphins swimming in the open sea(equalizer display), bobbing up & down according to the beats of his favourite songs.
When it comes to car audio, don't assume it's just about the music & beats. It's about aesthetic makeovers too!
For those who never knew about car audios, you won't know what I'm talking about until you feel the sound waves literally punching you in your face. Experience that kind of thrill and SHIOKNESS yourself.
Wanna know more about car audios?