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Old 5th February 2013, 01:18 AM   #1
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Join Date: Nov 2012
Location: Brasil
Default Flat dB response from different drivers...

Hi, my speaker uses 3 different drivers in an active system...

Woofer: Dayton 385
Sens. 88.9dB
8 Omhs

SS Midbass
Sens. 88dB
8 Ohms

SS Tweeter
Sens. 91,4
4 Ohms

The question is, as I use the same model of amp for all drivers, as the tweeter is 4 Omhs I will have a sensitivity of 94,4 (91,4 + 3dB)??? while the others all will have the 8 Ohms level of sens.?
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Old 5th February 2013, 02:02 AM   #2
IG81 is offline IG81  Canada
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What are these sensitivity figures quoted at, 1W or 2.83V? And I'll have to assume 1m in each case too.

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Old 5th February 2013, 02:38 AM   #3
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Join Date: May 2010
Location: MN
Yes, you have to figure out how they rated sensitivity for each driver and look at response and impedance too, but the only way the sensitivity of your tweeter matters is if the maximum output of your system is set by the thermal power handling of your tweeter, and it probably is not.

The woofer amp will be the limiting one if your max output is set by the amps. If your max output is set by overexcursion of any one of the drivers before you run out of power for the woofer, then the sensitivity doesn't matter for any of them.
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