Rich4349 wrote:So a driver with greater efficiency, and everything else being equal (if that's possible. Ok, all relevant specs being equal) WOULDN'T produce more SPL?
Go have a look at the T39 in the SPL charts section.
You'll notice that the S2010 and 3012lf charts are pretty much the same
at 1 watt, as described in the text by Bill.
What's different between the 2 drivers?
Sensitivity is almost the same, within 1dB. Vd (as you'd expect from a 12" compared to a 10") is greater and Xmax is greater in the 3012lf , So is power handling and thermal limit. That explains it's +6dB
maximum SPL compared to the S2010.
Lets look at the BP102 Vs S2010 though.
The BP102 is less sensitive than the S2010 by 4dB, but has greater Vd and Xmax in the same size package. With slightly higher Power rating and Thermal limt, the BP102 ends up with a +7 volt greater maximum output than the S2010. That's a couple of dB I guesstimate, maybe 3.
All this tells you, that in horns at least, it's Vd, Xmax, power rating and thermal limts that provide greater SPL, not sensitivity as such.
If 2 different drivers were otherwise = except 1 had higher sensitivity, the 1 with higher sensitivity
may have a slightly higher measurable SPL, but that may not convert to a audibly louder SPL...
edit: Bassmonster, sorry for sidetracking your build thread. Nice work!
I used MDF and one tube of PL.
