I just purchased an original JBL B-460 subwoofer on ebay - (as an addendum for my 250 ti´s). At least it used to be original at some time ..... . It looks in good working order but it seems not to have a crossover built in . When I hooked it up it sounds like a (bad) wide band speaker - with a wide frequency range. I did not open the cabinet yet - so I do not know if it has or does not have a crossover.

Does anybody know about the B-460 subwooofer and which crossover it originally had.

Also I would like to know what is the supposed power rating for the amp to drive it properly.

I am from Austria - so please excuse my not perfect english...