hey confused on ohm stuff

[wicked_rider_ 10+ year member]

hey im kinda confused on the deal with different ohms and what no like if i get two twelves lets say dual 4 ohm what kinda amp do i need just for example

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[KARLEON 10+ year member]

One of these threads has a woofer wiring diagram. It lets u see, if im not mistaken 1-4 subs. in various configurations. What ever the last ohm load reading is....is what you need your amp to put out its full power at....

So for example, i had two magnum D2 subs. They are dual 2ohm. I had them wired down to 2ohms as my final load. So i needed an amp that was 2 ohm stable and put out its max wattage at 2ohms. Which was my Tsunami 1800T

Hope that helps

 

[Nikuk 5,000+ posts]

hey im kinda confused on the deal with different ohms and what no like if i get two twelves lets say dual 4 ohm what kinda amp do i need just for example

Read this thread and follow the link in Post #4: Ohm's Law is Your friend

 

[jujumantb 10+ year member]

Depends how you wire them. Wiring a pair of voice coils in parallel ("+"s together, "-"s together) then the impedance (ohms) is cut in half. So say you just had ONE dual 4 ohm sub. On that sub, you have TWO seperate 4 ohm voice coils, if you wired them in parallel like I explained, it would present a 2 ohm load (cut in half) Series wiring (+ on one VC to - on the other VC, then the left over + and - go to the amp) does the opposite, it DOUBLES the impedance (ohms). So if you wired that same dual 4 ohm sub in series, you would present an 8 ohm load to the amp. When you have more than 2 voice coils total (in your question you have FOUR 4ohm coils), you need to combine wiring techniques (series-parallel, parallel-parallel series-series etc..). See examples of those at the link

http://www.jlaudio.com/tutorials/wiring/index.html

In your question, you could wire those subs in series-parallel to get a 4 ohm final load, OR wire in parallel-parallel to get a 1 ohm final load.

The amp you get should put out the most power at whatever load you wire your subs to.

 

[RattlinStratus 10+ year member]

rockfordfosgate.com has a woofer wiring wizard, just punch in the nubmer of subs, and the ohm ratings, and it gives you every possible way to wire them!