Used M.Logans-What to look for?

You don't need to "look" for anything. Nor can you tell about the condition of drivers of any speaker by looking. Trust your ears/take them home to listen with YOUR electronics (very important) and you'll know if you're a stat guy or not. I obviously am a stat guy because my humble Aerius i's (powered by Anthem MCA5 in a bad room) sounds great.

A good sub will eliminate the probs that were mentioned above. Good luck

Be aware that these are 4 ohm speakers that dip below 2 ohms at 20k. You need a good amp that's power is rated at nearly double the 4 ohm load as it is for 8 ohms.

The younger the panels, the better.

Dust, smoke, humidity and pollen are a factor. I failed to maintain my Aerius I's last spring and the output from the panels was reduced to virtually nil. I vacuumed them with a household vacuum cleaner and output improved a bit. Lived with that for a week and then pulled out the 4.5hp shop vac and they came back to life. This is recommended in the manual and by Jim Powers at M/L via email. "vacuum them. The stronger the better." They are extremely durable.

I love mine but be prepared to spend alot of time getting them positioned properly.