Do you adjust your subwoofer

I have a separate set-up for movies with a cheap sub that works just fine.  I never touch it.  

But, I am an occasional tweaker of my REL t9/x sub in the main system.  First, it depends on what speakers I am using at the moment.  If the Snell Type D are in play then the sub gets turned very low.  If it's the LRS or VA Bach Grands then the level goes up a bit.  Second, some recordings just need an extra bass oomph or reduction.  Third, I have two listening positions - my main sweet spot and a little further back and higher where I work at my drafting table.  The sweet spot is pretty neutral with tight full bass but the work spot has a bass bump which can be a bit annoying with some recordings.  So yeah, I'm a sub tweaker. 

I've been considering another REL to help even things out a bit.  But now I am seriously thinking of adding an SVS with app to take care of the adjusting while just leaving the REL on simmer.  

A bit more info, the remote app for my SVS subs is very useful.  Adjust from your fave seat and enjoy.  Can't say enough vs getting up and twiddling knobs in a darkened room.  Glad to see that not everyone buys into set and forget, it was what the engineer intended.  

I’ve got a Rel s510 and once it’s dialed it pretty much stays that way across the board. Possibly a tweak here or there, but rare.

Often.     My subs came with a remote that controls all the subs Optimization parameters and its six customizable presets.. 

Slight volume adjustment are used mostly. Possibly one or two presets which embellish some aspects of the recordings low frequency to my taste which lie below the established crossover region (100Hz - 33Hz).

I'd like to second @mijostyn clarity regarding -6dB sub-bass products. Don't you just love it when someone does the math? Nice.           

"@akgwhiz Glad to see that not everyone buys into set and forget it" Me too! It's literally the most fun we have with our system. My preset for Rap KILL'S it.

My 2 RELs crossovers are adjusted at the point where the main speakers drop off, with the sub levels and phase checked once in a while. I have a Schiit Loki Max EQ and use that in there a little bit if a recording needs it.