A happy side effect???

[mashaffer]

Actually 900uf looks better for the alpha.

 

[adason]

Use crossover grade non-polar capacitors...they are cheap.
https://www.parts-express.com/500uF-100V-Non-Polarized-Capacitor-027-378https://www.parts-express.com/400uF-100V-Non-Polarized-Capacitor-027-376

 

[AllenB]

Equalising an open baffle can be a sensitivity/bandwidth tradeoff. What this can represent is more sensitivity.