size of the driver


Coming from the "old school" and being a complete (or almost) novice here - in the old days back in 1970-75 we thought that the big (read - wide) driver will have better capability to produce more realistic sound, talking about lower end of the spectr at least. But nowdays I am seing 6 inch drivers stated as "bass". Just curious how well those perform or in another words what is the secret behind those if they really can perform at the same level as the 12 inch ones?

And another question which I guess is too simple and too basic around here that's why I couldn't find some point to point answer - when we speak about sensitivity - would that be a true statement to say that higher level (say 92-95 db) will allow to extract "fuller" sound spectr at a lower level of volume? My feeling is that with somewhat lower 89 db or less you need to increase the volume in order to have more visible lower end?

Thank you for your time
avs9
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Low frequency extension depends on SPL. If toy woofers (sorry: 6 inch woofers) are tested at low spl they go deep. A 12 or 15 inch woofer goes deep at reasonable spl. Consider headphones. They go very deep, but their spl is very low, and satisfactory only because they are right on your ears.
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05-01-12: Waj4all
>I wonder as to whether the experts in this thread would have a theory as to why the double-stacking of small speakers causes a subjective increase in the robustness of lower-midrange tones? This has been my experience, and I've seen where others have spoken of this phenomenon.

Wave lengths are longer at lower frequencies so the path length differences in the direct sound and reflections result in a lesser phase shift compared to the higher frequencies so the lower frequencies sum closer to +6dB compared a single speaker while the higher frequencies have lesser gains and even some comb filtering.

>And similarly, is it a fact that large mid-woofers are intrinsically more robust or warm at lower-mids than small-coned designs, perhaps, because of the same surface-area effect?

No.