They are an interesting option to check a mix on, and can be fun to listen to. I have several 800 ohm small speakers that will run off a headphone amp, sounding really good in their way. Making a full range array out of multiples, on a baffle board, improves the sound. Antique style tube guys will run speakers like that directly off a power tube, cap coupled rather than transformer coupled. Lots of different methods for enjoyment listening, but won't ever be first choice for serious monitoring.