Do you adjust your subwoofer

I have a NAD M17 v2i processor, it's remote has an overall volume Control, of course, and additionally has three separate targeted volume controls for tweaking the surrounds, Center and subwoofer channels.

So if the sub sound tends to be too much or too little for a specific movie I can tweak it, same thing for the surrounds and Center as well.

It's a wonderful feature.

I also create individual settings on the remote where I can listen to movies strictly in two channel with surrounds and subs while excluding the center channel because sometimes two channel just sounds better for home theater sound.  I can also set it to include the center channel on the fly. 
 

Granite audio sells a deep bass tone CD. 20-120 hz. Full sweep and 15 sec tone test per frequency. Can easily hear peaks and nulls or ap a measure room levels. 

Not all recordings seem to have the equivalent bass level.  I mean, what seems right to me, for that material.  So I do change the volume.  It's a db scale on my remote app so within about a  3-5 db range I find seems "right" in 90% of recordings.  Others set and forget.  As far as locating the sub that's a multi-faceted problem.  I find I can locate the sub at around 76hz and above so there's that aspect.  Volume less impacting to location to me/my set up and space.  

I have two REL S/812 subs and they are fine for 90% of the music I play. BUT, every now and then there will be a disc with so much low bass I have no choice but to get out of my chair and turn them down.  REL should really have built a remote control into their equipment.  If you want a perfect example of what I'm talking about, play Herbie Hancock's "Dis Is Da Drum". I don't know what is being used to create the extremely low bass but it gets my subs shaking and hits you in the chest.

I use an SVS 3000 Micro sub in my home theater system.  Using the SVS app, I have set up and saved two settings.  I use one setting for TV listening at low volume and another for listening to music and movies.The low system allows me to get good sound without the bass booming up to bedroom that is right above the home theater/family room.  My spouse is very happy about that.

The SVS 3000 Micro has transformed my modest home theater system.  I have five NHT Super Zero speakers mounted on my walls and the crossover is set at 120Hz.  Using that high crossover and a bit of subwoofer EQ, I get big sound with the tiny acoustic suspension Super Zero's.