I'm certain that it would alter the sonics and loading characteristics of the circuit as it was installed / removed from the circuit. To what extent this occurs will vary depending on the components and cabling being used. Sean
Are you talking about the cheap-and-cheesy temporary crossover that comes with the sub? That crossover is included so that you can you can find the proper crossover values and then buy or build permanent crossovers. The temporary crossover definitely colors the sound much more than higher-quality crossovers would.
I bought the x-overs designed for the 5As - which are supposed to be good. I just wonder if the pre to amp interconnect becomes less important in matching with the amp since it would seem the presence of the x-over would play a much greater role in the quality of sound and matching the circuit(?) between the pre and amp.