di ko sure kung ano meaning mo what are the speakers sa likod and harap, but if ur pertaining to ur stock speakers, most likely coaxials siya. for further explanations see below.

separates = speakers that are "separate" from each other. tweeters (small speakers para vocals), mid ranges (mid size tweeters na pang mid frequency vocals), and mid bass (mid frequencies na bayo). they are different from coaxials po.

coaxials = speakers combined into one. meron sya tweeter at mid range or mid bass in one. mostly ito yung mga kinakabit na stock sa mga kotse na meron 5 inch speaker tapos meron nakaptong/dikit na maliit na speaker sa gitna.