I'm thinking about installing component speakers , still looking a good one. But as a beginner of SQ I want to know what specs I should look for? E.G freqs range , amp THD , etc. On the other hand having a car PC made me think about 5.1 system , I 'm thinking about having 2 component sets for front and rear and a sub as you recommended. but If the car PC will not give me the quality I 'm looking for I'll just connect the sound card to the HU AUX.