Jon,
Set the B15's crossover to 80 Hz with the processor set to full range. Otherwise, the the sub will be crossed over twice - once by the processor and the second time in the B15's crossover.
Enter the actual value, not the difference.
Depending on your room and main speakers, you may want to try lower crossover points. I use 40 Hz with myn Revel Studios.
Set the B15's crossover to 80 Hz with the processor set to full range. Otherwise, the the sub will be crossed over twice - once by the processor and the second time in the B15's crossover.
Enter the actual value, not the difference.
Depending on your room and main speakers, you may want to try lower crossover points. I use 40 Hz with myn Revel Studios.