What the heck do these terms mean?

While I am on my soapbox, why are so many reviewers using obscure recordings to describe the sound? If I have never heard the recording how can I relate?

Using the same recording over and over can be really boring. That's why there's a lot of music :)  The point here is simply that the writer is using a recording that he thinks he knows well enough, and thinks its recorded well enough, that its worth mentioning how it sounds in the context of the review. The simple answer is 'you can't'. Just roll with it :)

1. Treble/ bass is dry- Huh? What does this mean?
2. Treble/bass is wet.- Huh? Again, what does this mean?
3. Organic sounding- Huh, huh?
4. Musical sounding.- What? Compared to non musical sounding?

1) if bass, not enough, if treble, too much and mixed with distortion (higher ordered harmonics)

2) ’wet’ usually refers to reverb in the studio. Not heard it used so much in audiophile circles.

3) Organic is the quality that allows you to play the system all day long without fatigue; isn’t bright or harsh, nice seamless sound (no obvious peaks or dips, so this is often associated with full range drivers in loudspeakers or speakers with a very well done crossover); may have some 2nd or 3rd harmonic distortion although not enough to be perceived as a coloration; also refers to a palpable soundstage that is well-defined and 3D in every respect.

4) Sounds like music. Also refers to euphonic colorations such as excessive 2nd harmonic. But this can also be neutral if the traditional higher ordered harmonic distortions that cause brightness are absent. And yes, compared to non-musical sounding, for example when higher ordered harmonics are causing harshness.