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Date: October 15, 2002 at 09:30:56
From: djk, [tc001.cedar-rapids.net]
Subject: Re: New sub project complete !!!! 18 Sound 18LW1400 18" sub


Eminence 151269
rubber surround
X-max=.36"(9mm)
Fs=23.4hz
Qms=11.63
Qe=.35
Qts=.34
Vas=16.27ft
Re=6.21ohms
Le=1.5mH
No=1.626%
SPL=95.41dB/2.83V/1M

USD$56 from Martin Sound USD$500 minimum order

A pair of these in 12.8 cu ft with a Q=2 high pass filter at 23.4hz=Faux=Fb=Fs=F3 are 101.4dB/2.83V/1M

With no eq a pair are 100.3dB/2.83V/1M at 50hz

I ran the numbers on your box and driver and with no eq it is 94dB/2.83V/1M at 50hz and 100W will cause it to exceed the coil overhang of 5.5mm at 50hz. If you plug in the claimed x-max of 12mm and see what it can do at x-max at 50hz you come up with 120dB.

The Eminence will handle 200W at 50hz without exceeding its 9mm coil overhang. A pair will do 123dB at 50hz without exceeding x-max.

The 18" driver will go into power compression as it exceeds the 5.5mm coil overhang while the pair of 15s will still be in the gap.

At USD$56, the Eminence 151269 are an incredible value.


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