4 12's in a crew cab
03-18-2007, 08:25 PM
#21
Originally Posted by cpelton
The speakers are wired in parallel therefore you take the reciprocals of the resistance of each sub and add them, the reciprocal of the sum gives you the total resistance.
ex. 1/8 + 1/8 + 1/8 + 1/8 = 0.5 = 1/2
= 2 ohms
if there were 2, 4ohm and 2 8ohm it would look like this
1/4 +1/4+1/8+1/8 = 1/.76 = 1.32ohms
ex. 1/8 + 1/8 + 1/8 + 1/8 = 0.5 = 1/2
= 2 ohms
if there were 2, 4ohm and 2 8ohm it would look like this
1/4 +1/4+1/8+1/8 = 1/.76 = 1.32ohms
Is that Algebra or something?
04-03-2007, 08:30 PM
#22
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Originally Posted by 1SlowHoe
Holy Is that Algebra or something?
Is that Algebra or something?
04-09-2007, 06:10 PM
#23
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I'm in college for electrical so trust me on this.
In series, voltage drops proportionally across each load, impedance adds, amperage is constant, and power adds.
In parrallel voltage is constant, impedance is added as (1/(1/a, 1/b, etc.)). amperage adds, and power adds.
Also, capacitors and inductors (most every electrical component can be seperated into either a cap, an inductor, or a resistor.) will add all sorts of complication to it with A/C current, DC current is still easy.
Ohh, and you could wire everything in series, it would just result in very inefficient power and it wouldn't move the subs very well. Too much impedance will result in lots of current loss, therefore loss of power, whereas too little impedance will result in too much current produced, therefore putting out lots of power, but also lots of heat which in turn fries the amplifier.
In series, voltage drops proportionally across each load, impedance adds, amperage is constant, and power adds.
In parrallel voltage is constant, impedance is added as (1/(1/a, 1/b, etc.)). amperage adds, and power adds.
Also, capacitors and inductors (most every electrical component can be seperated into either a cap, an inductor, or a resistor.) will add all sorts of complication to it with A/C current, DC current is still easy.
Ohh, and you could wire everything in series, it would just result in very inefficient power and it wouldn't move the subs very well. Too much impedance will result in lots of current loss, therefore loss of power, whereas too little impedance will result in too much current produced, therefore putting out lots of power, but also lots of heat which in turn fries the amplifier.
04-17-2007, 04:07 PM
#25
I have a sub zero Box for 2 12's that fits perfectly under the back seat of an extended cab 99 silverado, you can barely even see it.
It did a legal 136.5 DB on a term lab DB meter w/ two RE SE series subs running at .8 ohms. I am upgrading to 2 15"s and would be willing to sell this stuff if anyone is interested.
It did a legal 136.5 DB on a term lab DB meter w/ two RE SE series subs running at .8 ohms. I am upgrading to 2 15"s and would be willing to sell this stuff if anyone is interested.
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