dear mivec_nos,
bout the box enclosure, in a simple way to answer your question is... how loud or how soft u wanna feel the bass? to answer these question is simple, lets talk bout sealed box 1st!!!
sealed box or close box(its a same meaning).
this type of enclosure will bring u more feel on bass, what does i mean is... u feel the bass without any attacking ur heart. bout the size of these enclosure... lets say 1cf enclosure with 2cf enclosure... small enclosure(1cf) will sound deep then the 2cf. the 2cf enclosure will sound more soft and u can feel big bass emaging if ure listen more to sound quality music... i will more suggest u to use sealed box enclosures!!!
in a ported box or vented box!!!
its a opposite meaning with the close box, but the different big and small Cubic Feet(cf) is... small vented box will sound hard and pack while big vented box will sound a bit soft, the different between these 2 type of enclosure is vented box u can feel more vibration and air pack!!! these enclosure type will more to blasting sound and may be good to sound quality sound.
these fact will be good if ure in rite calculation of enclosure, amplifire power, rite frequency, car space, size of woofer and number of woofer driver!!!