Actually Dr. a DSP sub can give you better performance as it won't distort at 120-125dB's like non-DSP subs, to me that is worth the small increase in price. Not to mention the controlled frequency response provided by the algorithms in the chip.
Axiom's subs never even get close to 120db let alone 125(maybe the 800 does, I haven't seen anything yet).
The idea with DSP is not only for high db's, you get smoother response over the entire frequency range but so do many other manufacturers that are not using DSP, which was my point in asking if DSP was really necessary.
