While admittedly limited to mostly "full range" speakers in the below $5K range, my experience is that sealed enclosures provide tighter, more natural bass than their reflex or ported counterparts. Unless bass is very tight and *right there* it quickly appears muddy to me. This is due to a loss of accuity in my lower frequency hearing from over exposure to industrial noise. The only speakers that seem to get it right are ones with sealed enclosures.
