Originally Posted by AMO BRO
It's all theory sir! The machines that are used for measurement, are running mathematical extrapolations, based on merely two knowns. Namely, Voltage (because its easier than current to measure) and resistance (because it too is easy to measure). The rest is all very much programed theory.
And when actually 'measured', as in at 1m/1w the signal agitation is pink noise, which doesn't output a constant voltage. The sensitivity score is then selected, as being the frequency (or pass band, depending on standard being used) exhibiting the highest SPL @ 1m/1w, or 1w/1m, however, you prefer to express it.
The speaker doesn't have a uniform / linear sensitivity to all frequencies throughout its pass band, that is quite impossible. The spec published is the highest.
They should publish the actual sweep, so we would all have a more informed understanding (but many don't take actual measurements any more, they theorize what the performance is likely to be, and when they do, the scores are always bolstered / higher to the linear tune of 3dB vs real-world measurements), however, one could look to a frequency response sweep (if available), then locate the highest peak, and reasonably assume that is where the Sensitivity spec is based.
Regardless of being measured or purely theoretical, current resides within every volt in a locked relationship, based on load, no exceptions, not even in here!
Originally Posted by Bigus
I'm not making any argument against the math presented. AFAIK, the reason we reference everything to voltage is because our amplifiers try to maintain voltage source behavior, largely because current source amplification is difficult to do. Feel free to correct me.
And of course that wasn't my point.
Originally Posted by Jady Jenkins
See post 11 above - first paragraph nails it.
Originally Posted by Bigus
What... "theory"? An explanatory framework which is supported by logic and evidence and presumed true until falsified? Yeah, I suppose that fits pretty well. Thanks.
Please tie the bold text together... I am correcting you as stated I was free to do so.
AMO BRO is correct, we can use either, but our ability to accurately, and repeatedly take current measurements isn't as stable as taking voltage readings, especially when dealing with higher currents. Therefore, using ohms law, one can and does extrapolate the current measurements, by dividing the voltage by the resistance present...
I agree with him. It's really 6 of one a half dozen of another, so it comes down to ease, accuracy and repeatability. Therefore AMO BRO is correct in this assertion, as well.