Bill Abel wrote on Sat, 23 October 2010 09:40 |
Hi All,
I've reading these forums for some time now. I've gone back through the postings, and can't fine a definitive answer.
What's the amount of power a single LAB cabinet wired in parallel can safely handle. I realize the Lab12 specs at 400 watts rms each. But, from what I've read it seems with a horn loaded encloser with a sealed rear chamber, the power capability really increases.
Bill
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And as with any other enclosure there is no "definitive" answer.
The answer will depend on a lot of variables. And the "power" ratings are not always based on actual power and burning up the voice coil. Overexcursion and physically tearing up the cone is another popular way to tear up drivers-even though the voice coil may be fine (not burnt from power).
The "power" the coil will take remains the same (more or less) but the excursion at a particular freq will be reduced (untill you get down to a particular point) due to the sealed small enclosure.
So at some freq you may be able to "push" more level due to the fact the the cone would not be moving as far and therefore will not tear itself up as easily.
The electrical impedance will also rise with a horn loaded enclosure (at some freq) so therefore the cabinet can handle more VOLTAGE, but the POWER would still be the same.
This works if you think of your amplifier as a voltage source (which it is into a loudspeaker) and NOT a power source (which it DOES NOT deliver a particular power into a loudspeaker.
It delivers a voltage and the RESULTING power is a combination of the voltage delivered and the impedance of the loudspeaker at a particular freq.
And then you run into the whole dynamic range of the signal. Some sources are much more demanding (heating wise) on a loudspeaker-even though the meters on the amps may not be getting as high as sources that have a higher dynamic range and therefore produce less heating.
So add all that together and come up with a number to describe how YOUR usage of the cabinets may be-and you will have your answer.
But with so many variables-there is no way to come up with a simple single answer. Sorry.