Pioneer's crossover point is universal for all speakers. The QS8s won't do 50 Hz very convincingly. So you need to use the 80 Hz setting.
The general recommendation is it set all speakers to Small, regardless of their frequency response range, as long as the sub can go lower.
But you might want to try the Small, 80 Hz, with the sub set to Yes Plus. (Large with Yes Plus doesn't do anything.) Try both the plain Yes, and the Plus setting to see which you like better.
EDIT: Now that I think about it, I may be wrong about the Small vs. Large setting required for the Plus. I'm no at home right now, so I can't check.
Last edited by ClubNeon; 11/19/10 03:07 PM.
