Does the slope of the crossover have anything to do with the useable lower frequency for a CD horn? For instance, I have the 2332 horns, which are always used in systems with a 1 KHz crossover, I think usually at 12 db/octave. Can the crossover frequency be lowered if 48 or 52 db/octave slopes are used? If so, how low would be OK? Assume that the compression driver would not have any problems down to 500Hz.