Print Page | Close Window

wiring amp/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=22771
Printed Date: May 14, 2025 at 11:13 PM


Topic: wiring amp/sub

Posted By: sonic73
Subject: wiring amp/sub
Date Posted: December 12, 2003 at 9:22 PM

hi fellas need help wiring this amp and subwoofer. I get cofused with mono and stereo and dvc's. Thanks

fosgate 501s amp -   specs                                  

125w x 2 @ 4 ohms(RMS)

250w x 2 @ 2 ohms(RMS)

500w x 1 @ 4 ohms BRIDGED(RMS)

-----------------------------------------------------

fosgate sub rfd 2212  dual 4 ohm

500w (RMS)

1000w (RMS)




Replies:

Posted By: muppetmaster
Date Posted: December 12, 2003 at 9:27 PM
Is that one sub?  If so, it is not very compatable with that amp.  The sub can either be wired in 2 ohm or 8 ohm.  To ge the most out of your amp, either get a dual 2 ohm sub, which can be wired to 4 ohm, and you can bridge your amp, or buy another dual 4 ohm, which when wired together, can be 4 ohm, and again you can use the bridged mode, or you can go stereo at 2 ohms a piece.




Posted By: sonic73
Date Posted: December 13, 2003 at 12:33 AM

yeah it it one sub.

I had an idea  that amp was not compatible. It is what they sold my friend at a shop.

if it is runs at 8 ohm it will loose power to sub right?

it is never good/right to wire each voice coil independent right( one on each channel)?

I apreciated your help fellas.





Posted By: Durwood
Date Posted: December 13, 2003 at 1:46 AM

If you run the amp in stereo mode, one channel to each 4-ohm voice coil, you'll have the same power as if you wired the two voice coils in series for an 8-ohm load and ran the amp in bridged mono mode.  Between these two choices, the mono choice to the 8-ohm load is the better choice, since you don't have to worry about the signals to the two voice coils being slightly different.

Scott Gardner





Posted By: muppetmaster
Date Posted: December 13, 2003 at 1:47 AM

Running at 8 ohms, it will loose half its power, so yes. 

It is ok to run each coil on its own sub, but you have to make sure that the signal on each channel is EXACTLY the same ( get creative with Y splitters on your RCA's ), or else you could damage it, so this is not recommended ( you are doing it at your own risk ).

I still suggest getting another sub, or selling that one, and getting a dual 2 ohm if you just want one thumper. 





Posted By: sonic73
Date Posted: December 13, 2003 at 11:34 AM
Thanks fellas





Print Page | Close Window