I have a Klipsch RW10 sub and a Marantz SR7500 receiver in a 5.1 set up. The sub is connected via a single RCA sub cable to the LFE input on the sub from the receiver pre-out. If I use a Y adapter from the sub's left and right output into the receiver LFE pre-out, will I then be able to use the sub's crossover setting instead of the receiver's. The receiver crossover setting does not go below 80Hz. I want to test the crossover at around 60Hz.