What is flat impedance?

Who makes some of the easiest speakers to drive?

I'm just curious to see what you all are using with tubes.
I'm looking for a list of speakers to audition that will be kind to my amp.

01-17-07: Bryhifi
Who makes some of the easiest speakers to drive?

Look for speakers with specs of at least 90dB sensitivity and 6 ohm minimum (not nominal) impedance.

There's a fairly comprehensive list of easy-to-drive speakers if you read through this thread from the beginning.

Thanks Tvad, I just caught your thread 2 seconds after posting this question...............Looks like it will take a while to sift through but I appreciate the link-up.