What about this Pioneer TS-SW2541D 10" sub:
http://www.amazon.com/Pioneer-TS-SW2...A3ADWMNXT7FS32
Is there a big difference? This has the a frequency response of 20 ~ 1,000Hz and 250W vs. 20Hz ~ 144 Hz, 200W for the Pioneer TS-SW251.
Which has the better frequency range? I'm more concerned with range than power/loudness.