what wiring variations for dual 4 ohm???

^^^ It is.

Three dual 4ohm subs

.66 = parallel wire each sub down to 2ohms, and parallel them all together

2.66 = series wire each sub to 8ohms, and parallel them all together

6 = parallel wire each to 2ohms, and series them all together.

24 = series wire each to 8ohms, then series them all together

 
Ok forget the calculator, you just need to understand how to calculate resistance. When you wire two coils in series, you add the values. When you wire them in parallel you follow this formula:

1/Rf = 1/R1 + 1/R2 + 1/R3 + ... + 1/Rn

Where Rf is your final impedance load, and R1 - Rn are your individual loads (either coils or subwoofers, etc).

So if you have three dual 4 subs, and wire every coil in parallel you get:

1/Rf = 1/4 + 1/4 + 1/4 + 1/4 + 1/4 + 1/4

1/Rf = 1.5

Rf = 0.667

 
Ok forget the calculator, you just need to understand how to calculate resistance. When you wire two coils in series, you add the values. When you wire them in parallel you follow this formula:
1/Rf = 1/R1 + 1/R2 + 1/R3 + ... + 1/Rn

Where Rf is your final impedance load, and R1 - Rn are your individual loads (either coils or subwoofers, etc).

So if you have three dual 4 subs, and wire every coil in parallel you get:

1/Rf = 1/4 + 1/4 + 1/4 + 1/4 + 1/4 + 1/4

1/Rf = 1.5

Rf = 0.667
THANK YOU that makes sense. now i know

 
Ok forget the calculator, you just need to understand how to calculate resistance. When you wire two coils in series, you add the values. When you wire them in parallel you follow this formula:
1/Rf = 1/R1 + 1/R2 + 1/R3 + ... + 1/Rn

Where Rf is your final impedance load, and R1 - Rn are your individual loads (either coils or subwoofers, etc).

So if you have three dual 4 subs, and wire every coil in parallel you get:

1/Rf = 1/4 + 1/4 + 1/4 + 1/4 + 1/4 + 1/4

1/Rf = 1.5

Rf = 0.667
And there is the "short-cut" formula for resisitors of the same value wired in parallel: Rt(total ohm value) = R(value of resistor or coil)/N(number of resisitors)

 
And there is the "short-cut" formula for resisitors of the same value wired in parallel: Rt(total ohm value) = R(value of resistor or coil)/N(number of resisitors)
Yeah I suppose that works, but like you said it's only for when you have the same values (which should be every case in car audio).

 
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