The Best Tweak?

By far, addressing the acoustical behavior of your listening room. Bass modes can result in not just constructive and destructive waves creating peaks and/or troughs in bass response, but also "slow" sounding bass due to the resonant modes created by the rooms' dimensions, which left unaddressed linger long after the speaker has stopped reproducing bass notes. And higher-frequency wall reflections can also lead to the smearing of timing cues in recordings. PRaT = timing.

By far, addressing the acoustical behavior of your listening room.

+10

Here is my theory on appreciation of music.

If a person is tense, irritable or just distracted

their auditory senses are closed off to some degree.

If a person is relaxed by alcohol or drugs  his system

opens up to take in the full range of sounds being

emitted. Or something along these lines.

Someday we will begin to understand how the human body

takes in and processes sound waves.

For now we know just slightly more than nothing. 

So in response to Bolo's query I tend to think not.