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How to wire Amp to Sub


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skrewdriver88 
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Posted: December 27, 2005 at 12:10 AM / IP Logged  

Well I have 2 Alpine SWR-1042D  10" subwoofer with dual 4-ohm voice coils.  My girlfried got me a Rockford Fosgate Power T8002 Amp.  I was talking to a guy at best buy and he said to wire the subs in series and wire the amp in parrell.  I was wondering if that would be the best way to wire it up and if not how should I wire it up?

Thanks

dwarren 
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Posted: December 27, 2005 at 1:46 AM / IP Logged  

Well here are your two wiring options for your subs, I personally would go with the 4 ohm setup.

How to wire Amp to Sub -- posted image.

How to wire Amp to Sub -- posted image.

skrewdriver88 
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Posted: December 27, 2005 at 12:09 PM / IP Logged  

If i went with the 4 Ohms setup then the amp would only be putting out 125W x 2 RMS.  Or are you talking about the 500 W x 1 @ 4 Ohms Bridged RMS.  If so how would i wire it so it is bridged.

Thanks

pdmech73 
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Posted: December 27, 2005 at 12:36 PM / IP Logged  

I am in the same situation with my amp and sub setup. If you scroll down in the car audio install bay forum you will see mine. That diagram is series-parallel with the 4 ohm load requiring you to bridge your 2-channel amp if you want to get the most power.

dwarren 
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Posted: December 27, 2005 at 1:13 PM / IP Logged  
skrewdriver88 wrote:

If i went with the 4 Ohms setup then the amp would only be putting out 125W x 2 RMS.  Or are you talking about the 500 W x 1 @ 4 Ohms Bridged RMS.  If so how would i wire it so it is bridged.

Thanks

Yes, you can bridge that amp for 500 watts @ 4 ohms, it should show you how to bridge it in the manual, but generally you would use the positive from one channel and the negative from the other channel.

skrewdriver88 
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Posted: December 29, 2005 at 1:05 AM / IP Logged  
So the Rockford Fosgate Power T8002 Amp will work if i bridge it at 4 Ohms.  And is i did that it says 500Watts X 1 but once it is a 2 channel i would just wire each channel so it is at 4 ohms bridged correct?
dwarren 
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Posted: December 29, 2005 at 5:20 AM / IP Logged  

skrewdriver88 wrote:
So the Rockford Fosgate Power T8002 Amp will work if i bridge it at 4 Ohms.  And is i did that it says 500Watts X 1 but once it is a 2 channel i would just wire each channel so it is at 4 ohms bridged correct?

Well if I am not mistaken, you must present a single 4 ohm load to the amp, so the use the left + and the right -


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