The biggest problem I ran into was a ground loop which I was unable to completely resolve. Introducing the crossover into my system actually created two
ground loops in my system. One between my printer and the crossover, and one between the crossover and my sub.
Also, I think because I was going from an unbalanced connection from my PC to a balanced input on the crossover, and then converting back to an unbalanced connection to the sub and receiver I was losing some sq. Music did not seem to have the same depth and dynamic range with the crossover in the system. I think eventually I will upgrade my current receiver (which does not have an adjustable crossover) to an AVR.