You don't lack bass, you have too much treble

I use a SPL meter on a tripod, and

do not like pink noise.

I use 1/3 octave test tones, like found on Amazing Bytes CD. Last one sold, $9.99 was me, I snapped it up. Actually the one on discogs for $42. delivered is a good price, most often $75. + delivery.

I don’t use LP test records, something might be off, CD’s always sound the same.

After measuring and adjusting in some manner, still using test tones: then adjust to your preference by ear.

I might revise Erik's statement, also true: you might have too much midrange, too much presence, which can be appealing, especially vocals, but in the same way, lessens the balance of the bass, and in many cases, at our age of reduced sensitivity to highs, you might find yourself boosting the highs.

Eurythmics Sweet Dreams will help you with final highs adjustments after measurements.

Flat frequency response at the listening position is way too much treble.

Details by themselves alone unbalanced are a defect not a +...

This defect can come from the gear synergy or pieces but often  the first thing to look  at   and the last thing to look at is always acoustics and room acoustic to improve things ...

The OP is right as usual ....

😊

Flat frequency response is indeed what you want for accurate reproduction. Music has a natural high end roll off, but if your speakers don't reproduce the entire spectrum, you will have an artificial rolloff. 

Most of the points made above are valid.

Check the response at the listening position first. @eric_squires had a good suggestion and the 1/3 test tones also.

I used pink noise because it was easy and encompassed the entire spectrum.  Flat is flat.  unless your measuring instruments roll off or boost frequencies, it is what you are seeing.

If you see any dips (I have a serious dip at 58 hz), or hills, there is your problem.

Is it a particular component in your system?  Speakers, source, pre-amp, amp? or the room?  But, doing this test, at least you can see if there is a problem.

If it shows too much bass because you have three million REL subwoofers, but you like how it sounds, then more power to you.

I want my system and room to give me as close to a flat response as possible.  That is how equipment is typically designed, unless the manufacturer is playing games.  

Flat first, then adjust as you like.

Heck, I've gone to some serious hi end dealers and listened to their top equipment and they were sitting there trying to sell my friends and I on how much bass response the speakers had.  "you can feel it in your chest" they would say.  And I, who played classical violin, sax, etc. would say, you know that is way too much bass.

This is very similar to younger people who are used to MP3 or compressed digital and think this is great.  it is all they ever heard and people told them it was good.  Too much bass is too much bass.  was it really recorded that way?

Anyway, just my thoughts.