Exposed but up and behind the dash a bit is their typical location on just about everything. On left hand drive they are towards the right side of the footwell towards the center of the vehicle, I'd imagine right hand drive to also be towards the center of the vehicle.
Audio: JVC KD-ABT22 / JL sub+speakers / Sound deadening
Engine: WR-SRI / RRM 25% UDP / 6G75 TB
Other: RA Mudflaps