I make a point to illustrate that the Peavey SP4 cabinets that I utilize for live sound are 3-ways; this means that the audio signal is split into three frequency bands by the crossover. Ultimately what makes this so critical is that the 15" woofer in each cabinet, that is lowest to the ground, is actually a subwoofer by definition. It is receiving just bass frequencies, and is a Black Widow edition as well with more peak handling than necessary. 🎸
Having a 3-way crossover also makes for a pleasant distribution of frequency load across the speakers. The truth is that the SP4s I have are actually quasi 3-ways. The difference being that the middle woofer gets the mids + bass also. The sound quality is fantastic; I enjoy listening to them as much as my studio monitors.
