Hi....the box is the Hegelian antithesis of the driver at resonance. So equal bumps is natural and means at the box tuning is right on the money. But the output is not "symmetrical" in that the basis falls away fast below the resonance and you (and lots of manufacturers) may not care for that result.
But what sounds bests at your seat is a complicated mix of driver, box, room, and your taste in bass sound since the odd reinforcements and cuts the box produces in the bass band is its own colouration.Something similar could be said about all driver housings to some degree but the BR box is complicated and has a tuning.
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