Troy, bass is inherently slow. Any "quick, tight" character existing in a sound from a bass instrument is due to the higher overtones which aren't played by the sub.

Also, bass frequencies require no more power than any other frequencies at the same sound level; power requirements vary with sound pressure level and are unrelated to frequency. An 80dB level requires the same power at 40Hz, 400Hz and 4000Hz. An 80dB 4000Hz sound requires 10 times the power that a 70dB 40Hz sound does.

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Enjoy the music, not the equipment.