The Acheron, p2
Yes, there is a Third Way. And that is based on passive filter design. The sins of passive speaker-level crossovers are many; after all, these networks are dealing with highly reactive loads at high currents. Not so a line-level crossover, which will have a nice...The Acheron: Electronic Crossover Design
A common engineering challenge in home audio is the addition of an active subwoofer system to speakers that have limited bass extension.