The legendary JVC FXT-90 has no crossover. It's possible. Tuning the driver is one way by using it's natural FR and IR or relying on sonic tuning because while a dynamic is always going to be more sensitive they won't handle highs as well if put them far back (in the case of the pistons the BA is tip mounted) so if you have a BA up front that will do the job. A crossover simply won't fix the fact that a dynamic is going to be drowning out the BA resulting in most of them with a mid hump and a tapering off in treble. 2 years for me. Killed mine by accident on the other hand by accidentally blasting it with DC offset. The 2.1 without filter can actually take a bashing because my ones once fell into water (puddle of water, it dropped on the floor by accident) and when i dried it it's alright.