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subwoofer setup 

 

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 Post subject: subwoofer setup
Posted: Wed May 02, 2007 1:04 am 
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as i havnt bought my subs and amp for subs yet i thought id ask before i bought them soon... so i need to know a few things about the subs to know what amp i really need to get the best out of them

im going to be using two rockford fosgate t112d2's
now there impedence is 2ohmx2 im guessing that means 2 coils at 2ohms each now does that give me a 4 ohm sub?

now wiring, whats best? and what impedence will i end up with??
series wiring the subs? parallel wiring the subs or individual channel to each sub(which is what i was going to do)

basicly the amp i was looking at will give slightly under the power handling of the subs at 2ohms so if the subs are 4ohms and its best to wire them a certain way then ill need a diff amp to run them....

if anyone can help or even make sence of my issues answers would be much appreciated!!!

thanks
matt

 

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Posted: Wed May 02, 2007 1:24 am 
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Well each sub can be wired in series or parallel to give either a 1 or 4 ohm load to the amp. per sub.
Either way youll probably have a 2 ohm load on the amp.

 

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Posted: Wed May 02, 2007 2:00 pm 
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are the subs 2ohm or 4ohm if they are 2ohm the amp im looking at will be fine???

 

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Posted: Wed May 02, 2007 2:25 pm 
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Yes it will be fine.

Lower impedance means more power, but also more heat.

Run it at 1 ohm if you can, and the amp documentation should state if it is 1ohm stable or not.

Otherwise just do 2 or 4ohm.
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Posted: Wed May 02, 2007 2:33 pm 
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yer aiming to run them at 2ohms but the subs impedence is 2ohms x2 for each sub does that mean they r 2ohms or 4 ohms?

 

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Posted: Wed May 02, 2007 3:37 pm 
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Each coil is 2 ohms - like you said.
Depends on how you wire them. You can make each sub either 1 ohm or 4 ohm. Then you can wire them at 2 ohms to the amp.
Each coil can only take half the total rated power though, so its best to wire them both up.

 

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Posted: Wed May 02, 2007 3:54 pm 
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ok well the subs are rated at 600wattrms 1000peak so i was going to use a 2 channel amp 1000wattrms so 500wattrms x2channels at 2 ohms or 250wattrms x2 channels at 4ohms.

so after reading amplifier and sub doc's i thought 2ohms would give me good power vs control.

i dont want to go buy it if i should have just bought a mono to run both subs at 2ohm's

reason im asking now is because i have this feeling ill go spend a fortune on these and then get told "nar mate u should have just bought this type amp and wired it like this"

 

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Posted: Thu May 03, 2007 1:14 am 
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ok i think i have a better understanding after having a look around and basicly they are saying i would be best running a mono amp to run both subs probably one stable at 1-2ohms as i plan on wiring as a 2 ohm load
http://www.the12volt.com/caraudio/woofe ... ations.asp

 

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