instalation

I have a 13 plate Corsa VXR and want to install a subwoofer into it. I'm pretty clueless when it comes to audio so I'm a bit stuck. My stereo is a AVH-Z9100DAB. Does this have an amplifier built into it that'll run a subwoofer? If not, how do I go about getting the correct amplifier for this...

Hi I’m new to this but I’m thinking of replacing my current Sound system on my 2006 chrysler 300. I’ve been watching videos and have been reading installations and how to guides but a lot of them confuse me. My car has I believe a six channel speaker setup two 3.5’s and 4 6x9’s with a factory...