I may be unclear on what Power Response is, or how it is measured, so correct me.
Anyway, I was thinking about it.
Assuming one way of looking at it is the difference between direct and direct+reflected sound energy at the listening position...
I compare the swept sine SPL of two speakers in this room, with 500ms and 4.3ms right window Impulse Response timing in REW.
The EQ applied was "flat", no slope. The averaging is 1 octave (lots of averaging).
First, JBL LSR 308. Red line is 500ms window, black line is with 4.3ms window - seems to be just under the time of the first reflection from wall/ceiling/floor.
Observation:
The SPL of the windowed measurement is 2dB lower in the mid and higher frequencies.
Next, the MartinLogan reQuest electrostatic hybrids. I pick the same right window, 4.3ms. (Changing it a bit doesn't change the measure, so, I'll just be consistent).
Observation:
Only a .2dB difference in the higher frequencies. Direct, or Direct+Reflected SPL is nearly identical.
Conclusion:
I dunno, but there are the measures.
Comment?
Anyway, I was thinking about it.
Assuming one way of looking at it is the difference between direct and direct+reflected sound energy at the listening position...
I compare the swept sine SPL of two speakers in this room, with 500ms and 4.3ms right window Impulse Response timing in REW.
The EQ applied was "flat", no slope. The averaging is 1 octave (lots of averaging).
First, JBL LSR 308. Red line is 500ms window, black line is with 4.3ms window - seems to be just under the time of the first reflection from wall/ceiling/floor.
Observation:
The SPL of the windowed measurement is 2dB lower in the mid and higher frequencies.
Next, the MartinLogan reQuest electrostatic hybrids. I pick the same right window, 4.3ms. (Changing it a bit doesn't change the measure, so, I'll just be consistent).
Observation:
Only a .2dB difference in the higher frequencies. Direct, or Direct+Reflected SPL is nearly identical.
Conclusion:
I dunno, but there are the measures.
Comment?