I've posted this in the effects section but I'm also putting it here as I'm intrigued as to the replies from predominantly DB or BG players.
I play doublebass in one band and bass guitar in another so I want a HPF that will be good for both.
With doublebass I use a PJB Suitcase and 4b cab for monitoring and FOH, with it DI'd through the PA to help boost it when needed, only because the PJB sounds better than just the PA.
With bass guitar I just go from pedal board straight to PA with a f