Sound is good, but cabinet design is flawed and vibrates.
L. Allen "MIX_MASTER_ICE", Amazon
13 March 2013
Summary: Overall sound on these JbL 180's is good. It appears that the design of the cabinet, with a separate enclosure for the mid-range speaker, is flawed. Once I hooked these up I heard an odd vibration sound. Thought at first it was something vibrating on the stand next to the speakers, but tracked it down to the speaker itself. I believe the mid-range enclosure inside the cabinet has some vibration when certain sounds are produced.
Summary: Outer box wasn't properly taped,not secure and a little bit loose. Inner box(from manufacturer) have a obvious hole on it and wasn't properly taped or maybe was opened then re-taped, very likely is not a brand new item from manufacturer. one speaker have 4 loose nails inside that making noise when moved, the other was secure inside of the box. since outer box do not have hole, i would think the hole wasn't caused during transporation.