Looking at some L80T3 for a project...need new foam on woofers. Looks like the same driver set as the 4410, is that right? The 4410 is ported while I do not see a port on the L80T3. Is it acoustic suspension instead of bass reflex? Is that the reason for the nominal power rating difference of 300 Watts vs 125 and slight difference in efficiency at 90 vs 91 db? Looks like crossover points are same. Any other differences besides cabinets? Thx