its only got 2 or 3mm more, Id go SE 15 in any case, ported or sealed //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif Itll take that wattage no problem as well.Well the SE15 would have well over double the cone area, and without looking up specs Im doubting the SX has that much more cone excursion than the SE to make up for it (if any). Theorctically the SE15 would have alot more output, and likely sound better doing it. Ported, go SX. Sealed, go SE.