Flat power response, would imply that no matter where you measure it in a 360 degree sphere, the frequency response averages out to flat.
Most speakers including the Salons, KEFs, and Orions, have smoothly tapering power response, not flat. The main goal in power response, is not to have a big "bloom" in the crossover region from a highly directive midrange crossing to an omni tweeter etc.
Does the orion havve flat frequency and power response?
To quote SL:
I think 6 to 10db might be a bit much but I won't say anything conclusively because i have no experience with such a speaker. Maybe wmax could have helped solve this problem
Well omnipoles should have
extremely good polar response and flat power response out to 360 degrees. It's because of this that flat frequency response may not work. Even peter aczel noticed something similar when he (otherwise positively) reviewed the Beolab 5:
But what if omnipoles in a custom room SOUND best???
There's a definite science to building an omnipole, but I haven't read the thousands of papers on the subject to tell you what will make the most accurate omni.