Do you have any measurements of the various amplifiers powering your speaker?
There are TONS of different measurements that can be done on all sorts of gear.
The "simple" numbers do little to tell about about the actual sonic character of an amp-speaker-mic etc.
I love the people (especially HI-FI guys who say they can hear differences but you can't measure them.
WRONG- they are just using the wrong tools measuring the wrong thing.
We can measure all sorts of things that we cannot hear/detect.
BUT you have to be measuring the right thing.
And when comparing products-if you don't have the same measurement-collected in the same way-you really don't have anything to compare to.
Hence my insistence about side by side listening.
AND EVEN THEN- it is often hard to actually setup a fair comparison.
Have you ever tried to compare full range cabinets side by side?
How do you set the levels so they are equal? Anybody who has tried (and has a basic knowledge level) will quickly realize it is much harder than expected.
Do you use pink noise? What if one cabinet has a response that is not as flat as the others? What if one goes lower or higher? Do you use a sine wave at 1K? What if one cabinet has a little peak at 1K while the other has a little dip?
Do you try to use something like Smaart-TEF-Systune etc?
THEN it gets even harder to figure out what is "equal".
It is amazing how different one cabinet can sound-even when the level is 0.5dB louder. You "think" you hear all sorts of differences.
I know I have been fooled by even small levels.
I'll stop now--------------