Depends on what fx you have and how you like them. Also depends on if you are being fed to PA and you like some reins on soundguys that would be better pint pullers. Also the signal level in your fx loop and what your HPF likes.
A few examples.
Compressors and envelopes and octaves sometimes need the whole enchilada signal to do their best work.
An octave down will need HPF to follow in any case.
If your DI comes from a pedal you'll want the HPF in before that unit.
If you don't have any pedals and your HPF is a line level operating unit you'll want it in the fx loop.
Sometimes a unit will be good in a pedal loop with the buffered signal but too little input impedance of its own to plug pickups in direct.
Some big gun little stage players go the other direction and put HPF after their FOH send so they can make the stage amp bark a bit louder without sending a whole lot of lows into the room that messes up FOH.
The airy woody overtones that distinguish the DB are easily messed up by destructive interference from dual cabs. They also don't come back from the front PA to you nearly as well as the low bass. You'd be a candidate for IEM.
Otherwise you definitely need to point your one cab directly at your head.
Nope. You have twisted it all out of context to my reply to the hidden default suggestion the volume knob is useful for the muting function when the pedal is shifted from in between bass and amp.
Transit B is total overkill for clean sounds. Still, for what you would spend later on chasing compressors, plus a tuner, an overdrive, then the EQ DI pedal you might be ahead.
My SMX and 1518 are from 94/95. MDF and battleship grey tolex and LAF.
The speaker is a Celestion Made for Trace Elliot which I believe to be same as the one they used in the smaller 1523 cab. The 1518 is an extremely sensitive cab, does not make much below 60hz so HPF or judicious use of the graphic EQ is required to go loud.
If replacement is required, I have been told the Eminence 3015 is a goer.
Does doing both of those two options at the same time count? As in, try as I may my adoring public are not motivated to rapturous whistling. Polite applause and a couple of ye haws ( thank God the music is starting again??) is my lot.
Not sure what that means.
Ultimate caution warning. Do not connect two amps to one set of connected cabs, not even by mistake, or you will get two smoking ruined amps almost instantly.
The only ones worth having are very expensive. Worth it for buskers but an extension cable from the park receptacle is the go for me.
I imagine UK parks used for public events are similarly set up with power rather than all and sundry hiring in generators?
That's correct.
It blew me away when I found out that cab impedance varies widely with the frequency.
I have no idea how series funk happens, despite Agedhorse's best efforts.