I have a 3802 and its x-over doesnt go below 80 Hz. My mains are capable of going down to 40 Hz and my Velo sub is capable of going down to 23 Hz. After adding a Proceed BPA2 to my system for the two fronts I have always felt that my sub has become the weak link compared to the quick tight bass of the Proceed. So last night I put my sub to internal crossover (so it now uses the internal crossovers of the Velo) and set it to 50 HZ and in the 3802 setup I set the LFE to LFE+Mains. So now I have the mains getting the LFE as well. Now my mains reproduce LFE down to 40 Hz and my sub takes over below 40 HZ. The bass in now so much better blended into the whole system. I would suggest anyone with full range speakers to use the internal xovers of your (active) sub and set the sub's xover to where your mains start to fade. Just thought I might share this with all of you, even though it might be painfully obvious to some of you that this is the way to go.