Do you adjust your subwoofer

I use Svs 400 subs which are  sealed And very fast and articulate 

they have a verygood app you can adjust from your tablet or phone 

you didnot mention the frequency response of your speakers ,

for some movies or even music with poor recorded bass just turn up the volume  as needed ,you want your Bass to blend if your speaker says plus or minus 3db at say 

40 HZ add 10 db and then godown 1 db at a time ,you want to get the most out of the main speakers , to get good fill and still have seamless Bassfrom the sub.

you don’t want over lap ,that's why  +10 db is a good start ,and many mfg 

pare not accurate in their measurements ,there is no. standard on exactly wen the frequency starts rolling off ,many mfg are not totally truthful.

if you bought a much better sub you would hear much more articulation in the Bass notes. Sealed subs are faster then ported subs as well as more articulate .

look at JL audio fathom , Wilson ,Myself Svs 4000-SB , the Rel has a open passive radiator similar to a ported sub more boom ,

I fiddle with my 2 channel system sub's settings constantly. Different recordings have varying amounts of bass and analog sources require different output than digital sources. I wish my old Velodyne had a remote.

Never understood why some subs have remote control. I can see different settings for the home theater sub vs the audio sub (those effect in the .1 channel !). I found myself (on the HT system) often that the TV ADVERTISEMENT producer should start moving away from OVERCRANKING the sub channel (they seem to raise the level assuming that most people don't have a sub and their meager speakers otherwise would not make their effects audible). 

one of the most misunderstood things in audio is the amount of bass to have to enjoy movies or music is quite a personal thing, so by having a remote you can set it from your chair according to your preference.

Also, if you eliminate excess bass peaks first, you can raise up the overall bass levels.

@crwindy 

It is not personal at all. The settings for music and cinema should be exactly the same if a system goes down low in the right manner. One uncorrected REL 510 is already 6 dB down at 20 Hz. Getting it flat down to 20 Hz would require quadrupling the power. Studies have shown that the most satisfying curve for sound reproduction in the home environment boosts bass up 6 dB at 20 Hz falling to 0 dB at 100 Hz then flat out to 1000 Hz with a slow roll off with 20K down 6 dB. This would require 16 times the power in a REL 510.  In order to get this right you will need another 510 and a digital 2 way subwoofer crossover such as a Mini DSP. You would crossover between 80 and 100 Hz with a steep slope like 48 dB/oct then you can get the correct boost with the gain control on the woofers. I listen to an acoustic bass go down the scale and expect to hear each note at the approximately the same volume factoring in room acoustics which can be a little tricky. But, if the bass gets continuously louder as it goes down, the volume is too high.