A simple car audio test!

[shinzen]

Ok 1sty- this one isn't for you
Just want to quiz a you all on whether or not you know the difference between series an parallel wiring for subwoofers, and why/when you would use them. You will get your very own smiley upon correct completion of this quiz!

 

[nate0123]

I ran my dual 2-ohm sub in series so I could run it at 4 ohms (yippy) what do I get?

 

[jersey_emt]

My 2-ohm DVC sub is wired in parallel to get a 1-ohm load

 

[shinzen]

All right, here it is, what you have been waiting for, one (cheers) (cheers) for each of you-

For those kids who don't know what we are talking about, here are a couple of ghetto wiring diagrams for your viewing pleasure!

 

[nate0123]

mmmmm tasty

 

[shinzen]

A bit early, but tasty anyway. Here is another common application of series and parallel being used together, I know you all were waiting for another award winning picture!

In this case each of the 2ohm subs is being run in series to provide 4 ohms per sub. Then it they are run in parallel to the amp to get a 2ohm load, since there are amps that will burn up at 1/2 an ohm


Edited the picture.

Series wiring = negative lead to positive lead on the same voice coil, then positive lead to negative lead on the second voice coil. Which will double your resistance. This is done on both subwoofers so each sub is running at 4 ohms. Then, to get back to 2 ohms, the first negative lead on each subwoofer is run to negative the amp, and the last positive lead on each sub is run to positive on the amp, this is parallel wiring which cuts the resistance down to 2 ohms.

 

[dominoy2k1]

hmm i still dont get it.

 

[shinzen]

I'll explain a bit, let me know if this helps. When ohms are being discussed, it is referring to the resistance that the speakers have. The simple explanation is with higher resistance/ohms, it takes more power to run the speakers effectively reducing the power output of the amplifier. The lower the ohm/resistance load is, less power can be used, and you are increasing the power output of the amplifier. The trouble that is run into however, is that amplifiers are only stable to a certain point. If you have an amp that is stable to 1 ohm, and you have your subs ran in parallel to go to 1/2 an ohm, you will melt your amplifier.

 

[dominoy2k1]

hmm i kinda get it now.

 

[sndsgood]

ive never tooken a mecp test so i'm problaby not qualified to answer this question.

 

[Poseur]

umm, DVC 2ohm e12a.22 Ran it in series for the first week for breakin. giving 4ohm pulling 350w from my amp. After that, pulled it from the box, and ran paralell to get the full 1ohm power from my amp of 1100w.

 

[got wake?]

All right, here it is, what you have been waiting for, one (cheers) (cheers) for each of you-

For those kids who don't know what we are talking about, here are a couple of ghetto wiring diagrams for your viewing pleasure!

is this a joke? you could have at least used some good diagrams.

 

[shinzen]

Thanks for the love man, I don't have my old books laying around- and I am not an artist, feel free to post better diagrams

 

[1sty]

Oh, its on now!

Answer this one its a nice easy one

If the resistance of this circuit is measured from A to B, what is the overall resistance?

 

[shinzen]

hmm 1 ohm + 1 ohm + 2 ohm= 4ohm? Been awhile since I messed with that stuff... What have I started?(sad2)

 

[fkmp5]

(confused) (huh) (freak) (boom01) (crazy)
ps: running the stock sweet P5 setup and satisfied.. hahaha.

 

[1sty]

your right

 

[got wake?]

bah, is that all you got? c'mon, i spent 3 years in an engineering academy in high school.

for more fine examples, go here:
http://www.rockfordfosgate.com/rftech/wiringwizard.asp

 

[AFaceInTheCrowd]

bleh... suck on some of this...

if the rms voltage of a given headunit is rated at 5vrms and the preout voltage experiences clipping at 75% of the unit's max volume (company sucks), where should the gains on the amps be set to match the headunit?

 

[ragingxtc]

A bit early, but tasty anyway. Here is another common application of series and parallel being used together, I know you all were waiting for another award winning picture!

In this case each of the 2ohm subs is being run in series to provide 4 ohms per sub. Then it they are run in parallel to the amp to get a 2ohm load, since there are amps that will burn up at 1/2 an ohm


Edited the picture.

Series wiring = negative lead to positive lead on the same voice coil, then positive lead to negative lead on the second voice coil. Which will double your resistance. This is done on both subwoofers so each sub is running at 4 ohms. Then, to get back to 2 ohms, the first negative lead on each subwoofer is run to negative the amp, and the last positive lead on each sub is run to positive on the amp, this is parallel wiring which cuts the resistance down to 2 ohms.

isnt the load in the pic a 4 ohm load? if each of those subs have dual 4 ohm voice coils, and you ran each sub in series, it would make each sub an 8 ohm speaker. if you then run those two 8 ohm speakers in parallel, it brings the resistance back down to 4 ohms.

correct me if im wrong.