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Discussion Starter #1
I understand that a single 4 ohm voice coil woofer or speaker measured at 2.83 volts would be more sensitive than a identical 2 ohm counterpart if the sensitivity is the same. ie if you have two woofers same model, manufacturer and both are 86 db that the 2 ohm woofer is actually using twice as much power. How does a woofer that has a dual voice coil factor in to sensitivity or does it? For the sake of understanding lets pretend we have a woofer with identical specs, 86 db @ 2.83 volts.

8 ohms would be 1 watt / meter

4 ohms would be 2 watts / meter

2 ohms would be 4 watts/ meter

1 ohm would be 8 watts/ meter

the ones I can't figure out would be

dual 4 ohm

dual 2 ohm

dual 1 ohm

How does the voice coil wiring change the speakers sensitivity?

I hope I made what this clear and thanks for your help.
 

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Discussion Starter #2
Never got a answer on this. From what I can tell most manufacturers calculate DVC subs spl by wiring them in parallel and then using 2.83 volts at 1w / m to calculate SPL. Is that correct? In that case would I be mistaken in saying that a dual 4 ohm subwoofer of the same model would be more efficient than a dual 2 ohm?
 
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