Hi, I want to say from the beginning that I don’t understand anything about car-hifi. Would like to buy this car radio from (not laughing) redstar. Normally it costs 150 € and for Promarkt for 80 € here the link:http://www.pro-markt.de/03products/products.asp?area=7&subarea=57&Prod=67 I would like to buy boxes … where is the difference between 2 and 4 because of ? think that’s that with the deep, high-toe, subwoofer etc. oda ? which boxes would you recommend for the redstar radio. Like 4 ways. Are some speakers in some car radios than others? Oda doesn’t play the car radio with the speakers?