I really worked on the new JBLs today. Oddly to make things sound correctly, I had to reverse the phase of the surround speakers....no big deal. So I put on a CD (Camel - Coming of Age) and cranked them up for the first time. OMG!!!! They certainly deserve to stand along side of the Martin Logans.
Here are some observations. First, there is a guy on u tube that did a 33 minute review (and said absolutely nothing) about the 590s. He made some statements that are complete BS. First off:
JBLs can play very softly.
The compression driver is not harsh (if it is, its your source)
They have a huge "sweet spot" so you can share with your sweetie.
With even a modest sub, the 580s have more then enough guts to make glory.
It's the symbiotic driver in these speakers that make them special. They are clear, fast and dynamic. It's blend with the smaller ( and fast) 6.5" dual mid/bass drivers make the speakers "attack", in a very scary (but realistic) way. As a musician myself, the 580s made guitars sound real, drums sound real, Hammond organs with Lesilies sound real. Stuff is floating in the air.
The plus for me is that the 580s are rated at 6 ohms. That makes the power output of my older Sunfire II at about 500 watts RMS per channel. Powerful, dynamic, clean and fast. They are perhaps better then my MLs.
I'm impressed anyway.