In the late 80s/90s I gigged with a 150W Laney Probass, a 2x12 guitar cab, a home made 2x12 with two Mackenzie 'full range' pa drivers and a home made 'bright box' with two big piezo tweeters in it. The bottom 2x12 was vertical with the upper one horizontal, then amp with tweeters on top. Skillfully designed to maximise comb filtering.
In other words, the stack of @Bill Fitzmaurice's nightmares...