Impedance calculations? (1 Viewer)

[John H]

Three 8 ohm rated drivers wired in parallel = 2.6 ohms

My power amp is rated at 750w @ 4 ohms 1500w @ 2 ohms

"Theoretically" should it be rated at 1275w @ 2.6 ohms?

Are my calculations correct?

John

 

[Greg Monfort]

>Three 8 ohm rated drivers wired in parallel = 2.6 ohms
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I would have rounded it off to 2.667ohms for wattage calcs.
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>My power amp is rated at 750w @ 4 ohms 1500w @ 2 ohms
"Theoretically" should it be rated at 1275w @ 2.6 ohms?
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E = (W*R)^0.5, or ~54.77V
R = E^2/W, or ~2.35ohms, so 1275W is a wee bit optimistic.
~54.77V^2/~2.667ohms = ~1125W
HTH,
GM