Reading the other threads, decided to purchase a Polk PSW10 (Amazon has them for $89.99 with free prime shipping).

Looking at the back of it, it has Low Pass with a range from 80-100-160, and a switch for phase from 0 to 180.

From reading the other thread, I think I will run alligator clips to the speaker located at the bottom of the cabinet
and then out the back through the power cord opening.

Couple of questions:

1) For the Low Pass, what should i be on?

2) For the phase switch, should it be at 0 or 180

3) How do I know which is the Positive and Negative on the speaker in the cabinet

4) What gauge wire is the best to use?

5) Connecting it to the Input, on the subwoofer, either right side or left side input is fine, Correct?