I crossed + and - on each speakers so the ohms wouldn't drop.
A little confusing. So wire from + on amp to + of one speaker, then - of that speaker to + of 2nd speaker, then - of 2nd speaker to - on amp. Is that how you are wired?
Or do you mean, + and - from amp to one speaker, then + and - crossed to the 2nd speaker? If so, that is parallel with speakers out of phase.
Again, if you haven't tried parallel, you should, sound will be much better. Series wiring for raw drivers is OK, but generally not recommended for speakers with crossovers. It causes a less cohesive sound.