Hello cruzers,new member here, just wanted to let everyone one know it’s pretty easy to upgrade the audio in the Santa Cruz. I replaced all the speakers and added a 4 channel amplifier. I didn’t take out the factory head unit, all signal wires were located in the kickpanels ( I am using amp with high level inputs). The sound is like night and day from the underpowered factory system. I’ve been in the car audio field for 25+ years and have plenty of experience. If anyone needs any help upgrading their factory system, I’m here to help! BTW this was done in the non Bose SEL vehicle.