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finding power of a sub

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Old 10-02-2011, 03:51 PM
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50 Watt CAFz'r
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finding power of a sub

Is there a way to find out the power a sub can handle without knowing the specs? Reason why I ask is that I built a sub out of old subs and it works but I dont want to blow it up by giving it too much power.
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Old 10-03-2011, 02:17 PM
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The biggest limitation is usually the thermal power handling. What power handling did the voicecoil have in the original woofer? It should be close.

Otherwise, an old *rough* rule of thumb is ~150watts per inch of coil diameter. ie a 2" coil is good for around 300watts.
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Old 10-03-2011, 04:21 PM
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just listen to it.... usually the low end will be mechanically limited.. you can turn it up at and listen for bottoming out.. or other stress it is obvious..
I feel that to be able to hear when your speakers or amp are distorting is critical.. Turn it down if it sounds bad! before you smell smoke.
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