PORTED BOX:
1.) Reduced cone excursion and reduced distortion around vent tuning
2.) Increased output capabilities around vent tuning
3.) Vented boxes give you that extra “bump” that is preferred in certain types of music
SEALED BOX:
1 - High power handling capability
2 - Extended low frequency response and smooth rolloff (12 dB/octave)
3 - Excellent transient response
4 - Tolerant of minor enclosure size variations
5 - Easiest enclosure to build