The use of the word "musical" as an adjective

For years I've read reviews and many comments from audiophiles describing this, that, or the other component as "musical."   I never understood the term used that way, especially given the endless variables involved when it comes to how human beings perceive music, whether reproduced or "live."

Can anyone define precisely WTF "musical" means in any meaningful way?  

I didn't think so.   :)

Have at it, folks.