I understand that all notes have harmonics, but any harmonic above 60 Hz, (the op's crossover point) will be reproduced by his mains and not the sub, so I wouldn't think he would get directional cues from the harmonics, from the sub? The mains, yes, but not the sub. What am I getting wrong?
Subwoofer Question
Could having just one subwoofer (REL T/7x)with the crossover set around 60hz pull my image to the side that the sub is on?