This is my 2007 Mazda CX-7 that I'm building to compete in USACi SQ shows in Mexico and the USA.
I'm part of Team Hybrids, the competition brand of Hybrid Audio Technologies founded by Scott Buwalda that sells some of the best speakers in the world.
This is my CX-7.

The Head Unit is an Alpine W505.

The music travels to the back via a fiber optic cable and also via Ai-Net cable, where it's processed in an Alpine H900, and sent to five JL Audio amplifiers hidden under a false floor.

Hatch with the false floor and a sealed box with two JL Audio 12w6v2 subs.

The power distro block is hidden under a JL Audio 500/1v2 chasis.

The front stage is handled by a Hybrid Audito Technologies Legatia L841-3 set.

The L8's are on the doors.

HAT L4 midranges in the kick panels.

HAT L1 tweeters in the a pillars with quick disconects.

The Hybrid CX-7 at some shows.