Impressions of the JBL L100 Classics?

I have the L100 Classics.  What is it you are looking for?  

I have the L100 Classics.  What is it you are looking for?  

Thanks for responding, @rpeluso  .

I guess, to begin with: what are your overall impressions/feelings about this speaker?

Does it seem to suit a certain genre of music?  Does it play better loud than soft or vice versa?  Air, detail, clarity?  Low end?  The picture that Music Direct has shows a knob on the front faces of the speakers under the speaker grille; what does that knob adjust?  I note that it is biwireable; do you biwire and if so is that a noticeable improvement?

Thanks again for responding, and as I think of more questions I will ask you.  Thanks again!

I have spent significant time with vintage L100 Century speakers and think they are one of the worst speakers I have ever heard. I certainly hope that the modern equivalents are better. My guess is that they are.

I bought open box demos from music direct. It I was a smooth process and they were like new. I have sadly never heard the L100. 

L100 was a studio standard, lots of oomph.

Classic 1970's sound, if you listen to 70's rock they will shine