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help with ohms!

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Old 08-26-2007, 07:32 AM
03civiclxcoupe's Avatar
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Default help with ohms!

im not good with ohms when it comes to this

http://www.crutchfield.com/S-NVeRLBL...sp?i=575PL2212

would those subs and this amp

http://www.crutchfield.com/S-NVeRLBL...mp;I=489AP1200

if everything was the same ohmage i would be fine i just don't get the ohms

the subs are single voice coil 8 ohms and the amp is 200x2 at 4 ohms?
 
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Old 08-26-2007, 10:37 AM
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Default RE: help with ohms!

As far as I can tell, you should be fine... as long as you can wire each sub separately to each channel of the amp, since if you bridged the system, you could be over-powering the subs...
Someone with more knowledge will be along shortly to tell you any specifics about these components...

Mr^Man
 
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Old 08-26-2007, 11:09 AM
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Default RE: help with ohms!

crutchfield is waaaaaaay overpriced. What are your goals/budget and I can help you choose a system for your needs

Edit. Those subs can be wired in series for a single 4 ohm load on the amp. Just go postitive to positive and negative to negative.
 
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Old 08-26-2007, 11:29 AM
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Default RE: help with ohms!

ORIGINAL: kokasian

Edit. Those subs can be wired in series for a single 4 ohm load on the amo. Just go postitive to positive and negative to negative.
P-to-P and N-to-N is parallel, not series, which would, as you say, give 4ohms... the reason I recommended against it is because the amp pushes 600Wrms into 4ohms, and the subs can only handle 200Wrms each, for 400Wrms total... each sub to its own channel on the amp gives 200Wrms to it, which matches its power handling capacity.

(as an aside, series would be N of sub 1 toP of sub 2, then amp P to sub 1 P, and amp N to sub 2 N... which would give 16ohms total, and only about 150Wrms into the pair, if I'm not mistaken)

Mr^Man
 
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Old 08-26-2007, 11:59 AM
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Default RE: help with ohms!

You should read throught THIS website. It has everything you should need to know. Also since you are sketchy on Ohms law, there is a great tutorial on there.
 
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Old 08-26-2007, 12:31 PM
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Default RE: help with ohms!

just so everyone knows, if you bridge a 2-ch amp with 2 subs it actually splits the ohm load causing it to be cut in half one more time than most people think. for example. 2-8 ohm subs wired in parallel comes out to 4 ohm, then when bridged on a 2 ch amp is cut in half again to 2 ohms. a lot of people dont take into effect that bridging 2 subs cuts it in half again. 1-8 ohm sub would run at 4 ohm on this amp, while 2 will run at 2 ohm

so those subs on that 2 ch amp will run at 2 ohms if it is parallel and bridged, and will allow for the most efficiency of the amp. so those subs would work great with that amp. since the amp will push 300 rms per channel, and the subs have a power range of 50-400 rms.

but also i agree with kokasian that crutchfield is overpriced, so i would look around before i bought from them
 
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Old 08-26-2007, 12:33 PM
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Default RE: help with ohms!

plus 2 12" subs...WAY overkill IMO
 
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Old 08-26-2007, 12:39 PM
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Default RE: help with ohms!

should i just go with 1 12" i was thinking that too

and so are u saying that if i did get those subs and amp that i could just run each speaker on its own channell and it would be working at full RMS power
 
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Old 08-26-2007, 12:43 PM
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Default RE: help with ohms!

i have an 80x4 amp for my speakers so i want bass to match that good how many watts u thinks hould be good
 
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Old 08-26-2007, 12:45 PM
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Default RE: help with ohms!

ORIGINAL: Sigracer10

just so everyone knows, if you bridge a 2-ch amp with 2 subs it actually splits the ohm load causing it to be cut in half one more time than most people think. for example. 2-8 ohm subs wired in parallel comes out to 4 ohm, then when bridged on a 2 ch amp is cut in half again to 2 ohms. a lot of people dont take into effect that bridging 2 subs cuts it in half again. 1-8 ohm sub would run at 4 ohm on this amp, while 2 will run at 2 ohm

so those subs on that 2 ch amp will run at 2 ohms if it is parallel and bridged, and will allow for the most efficiency of the amp. so those subs would work great with that amp. since the amp will push 300 rms per channel, and the subs have a power range of 50-400 rms.

but also i agree with kokasian that crutchfield is overpriced, so i would look around before i bought from them
ummm...ok... does someone need to read and understand ohms law.....please explain how bridging a amp cuts your ohm load in half... all bridging a amp is combinding two channels together for one output equal to
the sum of both channels...it does nothing to the resistance of your coils...

 


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