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RE: Large Cones = More Realistic Lower-Mids Tone?

The question in my mind is, WHY does area matter? Why do small cones often (usually?) seem to lack "heft"?

I see three candidate reasons:

1) baffle step causes bass loss. The turnover frequency goes up into the midrange when the box gets narrow. Big cones are usually in big (wide) boxes. Problem is, imaging improves, sometimes dramatically, when the box is narrow.

2) You can restore heft with BSC equalization, but that does not affect the directivity shift so it's not the same thing. A narrow box becomes omnidirectional in the lower midrange, exposing room resonances and damaging the impression of the recording venue - perceived as losing heft/impact/naturalness.

3) excursion limitations cause small drivers to get muddy unless they are crossed over high and steeply. Bigger drivers crossed at the same frequency will have less excursion. At one time, Doppler distortion was blamed; I don't hear that argument so much these days. My own experience leads me to guess that audible excursion-limited sonic quality begins at a tiny fraction of the Thiele-Small-specified xmax.

Edits: 04/24/12

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