hi kelkel1688 ...

you know , you have a
reasonabe audio decent system .
probable with some help from a mentor in setting up the system .
in fact , this system should be able to
deliver acceptable
musical satisfaction .
obviously ... you are not
sonically fulfilled

may i
suggest that you play some
modern and
classical jazz cds .
modern jazz uses
amplified bass guitar . classical jazz with double
bass ,
no amplification is involved . if the system is able to accurately
capture the
true nature of these two instruments , you should not
worry too much . and if it is in the opposite , there is always the
opportunity to rectify by tuning . by the way , that opportunity could
be pure
frustration as well ...

however , you could
marginalised your frustration by merely playing
your
preference music . which means the audio system accurately
capture the preference music , not with
non-amplified double bass .
it is your call ...
preference music ...

don't you wish to achieve accuracy with the double bass as well ?