Since my Primaluna integrated amp only has 1 pre-out for a sub, I run my Lawrence Violin speakers at full range. My speaker dealer suggested I set the cross-over at 45hz on my E-110. Besides the cross-over setting, it's important to set the phase on the E-110 also. I was told to invert the positive and negative connections on the main speakers so they are out of phase with the sub. Play some heavy bass music and adjust the phase on the E-110 until there is a null in the bass. Then reconnect the speakers to the correct terminals. The bass on my system became tight without any bloat.
I suggest you experiment and decide which way sounds best!
I suggest you experiment and decide which way sounds best!