I’ve been using Altec 604Cs for 46 years.
For decades, audiophiles would sneer at them, calling them, among other things I won’t repeat here, “PA speakers”.
Well, I’ve been happy with them, and like clothing fashions, what goes around comes around and they’ve made a comeback.
They move a lot of air. Imho, that is one of their prime virtues. Matched with the right amps, they are heaven. I wouldn’t trade them for anything, and I haven’t.
see
theaudioatticvinylsundays.com