The room has a larger impact on bass transient response than the drivers.
If there's a large peak in the bass response of your room, the bass transient response is going to be slow and boomy, regardless of the quality of your subwoofer.
Bass traps are the only real solution to "slow bass" in most rooms; it is not possible to have too much bass trapping.
Parametric equalization can also be used, but this only compensates for amplitude, and does nothing to fix the room resonances that cause the amplitude problems in the first place, and attempting to equalize a large null can increase distortion and reduce amplifier headroom.
After fixing the room, distortion and doubling from the subwoofer itself become the next important issues to address, and on this point, high-end subs will begin to dramatically outperform low-end subs.
ie: the sonic differences between subwoofers are almost always swamped by the much larger effects of room acoustics and standing waves.
It's a small rainstorm within a hurricane.
If there's a large peak in the bass response of your room, the bass transient response is going to be slow and boomy, regardless of the quality of your subwoofer.
Bass traps are the only real solution to "slow bass" in most rooms; it is not possible to have too much bass trapping.
Parametric equalization can also be used, but this only compensates for amplitude, and does nothing to fix the room resonances that cause the amplitude problems in the first place, and attempting to equalize a large null can increase distortion and reduce amplifier headroom.
After fixing the room, distortion and doubling from the subwoofer itself become the next important issues to address, and on this point, high-end subs will begin to dramatically outperform low-end subs.
ie: the sonic differences between subwoofers are almost always swamped by the much larger effects of room acoustics and standing waves.
It's a small rainstorm within a hurricane.