Generally, large adjustments in EQ are not a great idea. There are some exceptions, but hold that thought for a second.
Take for example, you'r speaker that is 12db down at 32hz. If your average power at listening level is 10 watts, with 12db of EQ boost at 32hz you would be doubling the power 4 times. So you would need 160 watts to get the same output.
So as you can see that you need a ton of power, not to mention that this may be well outside of the response of the driver, and will almost certainly exceed the maximum excursion of the driver.
Now there are applications with SEALED enclosure subs, where this type of boost is applied by design. A sealed enclosure drops off at 12db/octave below resonant frequency. So using a driver that has plenty of Xmax, and can handle a lot of power this type of boost CAN be used to get smooth and flat low end extension.
Generally when you EQ, rather than boosting what is "missing" its better to take out the peaks, and whats left shines through, and sounds more full and balanced.