hmmm, interesting, upper bass is quite good, but since i'm going to buy new speakers in a year (more likely to be several years) which probably won't reach 20 hz (since those speakers that can, are too expensive) a sub would be a good idea, i could save for that and get myself a good one, that would also be the better solution, since a new crossover would only get me into more trouble, and the original one is quite good too, so i won't replace them,

so for now, the idea is to get a sub.

Greetz,
Basite.