Originally Posted by stevensctt
Why not feed your SW with the same signal as your speakers?
(1) One of the major benefits of having a subwoofer is *not* stressing your mains with bass that should only go to the sub.
(2) Crossovers have two halves, and they generally work best when they are designed to work together and are in the same box. Having the high pass for the mains and the low pass for the sub working closely together is generally the best solution.
I've gone down both roads, and every time I've tried it, high passing the mains and low passing the sub with the same piece of equipment is the simplest and best solution.
The extra cleanliness due to offloading the mains has been the benefit that I noticed most.
One obvious benefit is that when the crossover's frequency is varied, you automatically vary both sides together, and you have one less adjustment to screw up.