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best way to wire single sub

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=77348
Printed Date: October 31, 2024 at 6:26 PM


Topic: best way to wire single sub

Posted By: dungslung
Subject: best way to wire single sub
Date Posted: May 05, 2006 at 11:10 PM

I have a Rockford Fosgate P2002 amp to run a single 4 ohm sub. What would be the best way to wire my sub to get the most power... the amp is stable at 2 ohms but it says 4 ohm minimum when bridged but on the diagram... i don't know i need help. im confoosed.



Replies:

Posted By: bryceyaworsky
Date Posted: May 05, 2006 at 11:14 PM
run it bridged.




Posted By: dungslung
Date Posted: May 05, 2006 at 11:18 PM

series or parallel? cause wouldn't parallel burn up the amp... while series would only give me an 8 ohm load... (im learning so be patient with me)





Posted By: dungslung
Date Posted: May 05, 2006 at 11:48 PM
also ^ is there anyway i can get a 4 ohm load from my amp when bridged?




Posted By: bryceyaworsky
Date Posted: May 05, 2006 at 11:50 PM

your manual will tell you how to hook up your speaker wires to the amp.   

Basically you combine the left and right channel together to power one speaker.  Say  you had an amp that was 50x2 rms @ 4 ohms, 100x2 rms @ 2 ohms, and 200x1 bridged (at  4 ohms).  Bridged and stereo @ 2 ohms are the same thing in terms of ohms to the amp.  What you are doing when you bridge is take each channel's power @ 2 ohms, which is 100 watts rms and combining them.  Overall, the amp will see a 4 ohm load which is fine.





Posted By: geepherder
Date Posted: May 06, 2006 at 7:18 AM

Is your sub a single voice coil or dual voice coil?  Your first post implies it is single, but your second implies it is dual.  If it's a single voice coil 4 ohm sub, simply connect it to the brigded terminals (4 ohms bridged).  If it's a dual 4 ohm voice coil sub, wire them in series and connect it to the bridged terminals (8 ohms bridged- electrically the same as 4 ohms stereo).  Do not worry about achieving 4 ohms bridged, just hook it up first and see if you like it.  If you don't, then your options are listed below.

If it is a dual 4 ohm voice coil sub, in order to achieve 4 ohms bridged, you'd purchase another of the same sub, switch to a single voice coil sub, or switch to a dual 2 ohm sub and wire the voice coils in series. 

Do not only connect one voice coil to achieve 4 ohms.  That would cut the power handling characteristics of the subwoofer in half. 



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My ex once told me I have a perfect face for radio.




Posted By: dungslung
Date Posted: May 06, 2006 at 7:42 AM
ok, thank you ^ i just wasn't sure if i could get a 4 ohm load... and it is a dual 4 ohm sub... how much less power would i get running the 8 ohm hook up bridged since it could be hooked up at 4 ohms brindged?




Posted By: geepherder
Date Posted: May 07, 2006 at 8:24 AM
It'll be roughly half (maybe a little more due to less power loss due to heat), but check your manual for specs to be sure.

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My ex once told me I have a perfect face for radio.





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