I am trying to learn to build fullrange loudspeakers and I've been reading some books but none so far have really explained the pros and cons of a Linkwitz Riley vs a Butterworth crossover. The last book said that a Linkwitz Riley crossover provides better damping. What exactly does this mean? Will a Linkwitz Riley crossover lower Group Delay? Will a second order L-R roll off at 13 dB per octave instead of 12?