Quote Originally Posted by E-Stat
The 3 db peak at 60 hz did just that. A similar boost centered around 5k also enhanced it's "brilliance". There is no question they were one of the most successful speakers in history. It was the quintessential rock speaker. As for me, I preferred a speaker with less "personality" and better first octave performance.

rw
The review made no mention of the two peaks you describe, see quotes.

“The integrated frequency response of the JBL L100 (with its controls set at “0”) was unusually smooth and flat within +/- 3 db from 55 to almost 17000 Hz. The bass response fell off smoothly below 60 Hz but was still effective down to 45 Hz.”

“Our simulated live –vs- recorded test which is in effect a test for flat response from 200 Hz on up was a real ear opener. Most of the time we were unable to detect the change-over from the original sound to its reproduction through the L100. In this important though not definitive test the JBL L100 ranks with the most accurate speaker we have tested- certainly no other has been better.”