Is There A Device For Home Use That Can Measure How Low The Bass In My Speakers Is?

FWIW, there are many tone generator apps you can download and run through your DAC. You can pick specific frequencies or sweeps. That might be easier if you have an external DAC. 

+1 to @djones51 ...dB on the SPL will tell you 'how much' vaguely, but a calibrated mic in even a eq like an 8024 Behringer will show you 'where' as well.

Used ones can be had for 100ish$ on average.

Buy a new mic, one never knows about the used ones.. Trips to the floor, the like...

Then you can play with it, if the mood strikes... ;)

Have fun, J

If you have a laptop down load a demo version of JBL Smart or has a spectrum 

analyzer and pink and whit noise generators

you can use that to test the complete Fr response

of your speakers

Lots of spectrum analyzer apps available for Android and iPhone. You can get an inexpensive calibrated mic from Parts Express. Pink noise can come from an app, CD or Vinyl. Do not use interstation noise.

White noise from FM is equal energy per frequency.

Pink noise is equal energy per octave.

Big difference, as white noise is much brighter - as energy doubles with each octave. Measurements made with white noise are all wrong, as the curve rises at 3dB/Octave from 0. 63Hz is 12 dB lower than 1KHz.