Silas Pradetto wrote on Thu, 25 March 2010 14:48 |
If it's limited to 113dB acoustic power, then I think he's going to need a bit more sensitivity to hear the sub at all. Even with a pair, 119dB is pretty much not even going to be heard when run with any decent mains plus guitar amps, drums, etc.
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The McJerry chart seems confusing, I read the single Lab 12 Amplitude Response as 119 dB at 60 Hz, which seems to conflict with the solid line level below in the Acoustic Power chart. 119 dB at 400 watts corresponds to my ground plane SPL measurements.
At any rate, my real world findings are that the Lab 12 in a small ported cabinet can make some bass. With an amp capable of 800 watts per cone, 122 dB peaks, 128 dB for a pair at one meter in the 60 Hz range can be had. Whether that is “enough” is subjective.
Regardless of cone type, a pair of 1.5 cubic foot boxes are not going to cave your chest in unless dropped from a sufficient distance.
That said, the single 4015LF below has satisfied a lot of drummers as a drum sub, and a pair of Lab 12 in a cabinet of the same gross volume would be capable of more output below 100 Hz.
In a small club, where the sub is basically just bringing the kick drum up to the level of a stage bass amp, that kind of output works.
The chart below shows three cabinets using the same drive level (voltage) shows a 2.58 gross cubic foot Lab 12 (Lab Tiny) compared to a 4015LF in a 5.17 gross cubic foot box. The Lab 2x12 is 7.76 cubic foot gross.
Art Welter