yes low impedance in upper registers is nothing to worry about but tuning impedance curve in the lower registers to design a speakers desired characteristic. I am thinking Wilson speakers would be a good example some Wilson’s are known for having great slam in the lower registers, does this make sense or am I completely off base here?
@jeffrey75 I don’t think Wilson is doing what you’re suggesting, if that’s what you mean by ’off base’.
Take ATC speaker/driver as an example, if one desires a good low frequency extension out of a small-to-medium sealed enclosure (which I prefer) design speaker with a given size of driver, efficiency has to be sacrificed.
@lanx0003 While this is certainly true, what about large multi-driver full range speakers that are really hard to drive? They don’t get the Murphy that a smaller speaker does for low efficiency.
I might see this a bit differently because our ears hear on a logarithmic curve. I figure if 100 Watts won’t do the job, 200 or 400 Watts won’t either because 2 or 4x more power isn’t that much louder- 3 or 6dB. To get to a perceived ’twice as loud’ its generally accepted that you need 10x more power. In radio parlance this is known as ’gold plated deciBels’; 1000Watts, I think we can all agree, simply isn’t practical.