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wiring 4 12's

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=3951
Printed Date: May 12, 2025 at 5:12 PM


Topic: wiring 4 12's

Posted By: Xplod 1
Subject: wiring 4 12's
Date Posted: September 25, 2002 at 9:04 AM

Hey guys,

I have a XM-3001SXD class D sony amp, It has two speaker output terminals on it. If I connect two 4ohm 12" XS-L1236 sub's two each output, would it read the draw at 1 ohm? Also, how should I wire the subs for each terminal to read a 2 ohm draw. According two the specifications sheet, This would send 250 watts RMS to each of the four subs, Right?



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XPLOD 1



Replies:

Posted By: Velocity Motors
Date Posted: September 25, 2002 at 10:19 AM

These are SVC subwoofers so you only have one possible way of wiring this set up is to go with a series wiring schematic. Otherwise if you go with a parallel you will end up with a .5 ohms load ( the digital amps do not like anything lower than 2 ohms ) The only way to do this is to have two sets of subs wired in parallel to the amp and get another amp to hook up to the other set of two subs. If there is another way that I have not thought of someone will be sure to correct me posted_image



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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA




Posted By: djfearny2
Date Posted: September 25, 2002 at 7:03 PM
series works i find that lets say you take a bull$%^ amp like a kenwood 600 watt and run two buy one get one free subs you can series wire the subs and at the same time bridge the amp and you will not have to worry about amp temp or blowing channels it make the load so much less on the amp with the bridged sound. (harder quicker bass)_




Posted By: Xplod 1
Date Posted: September 25, 2002 at 9:13 PM

posted_imageREPLY:  To Jeff

   I was thinking the same as your answer, untill I was reading the operating instructions.

To start, It says that this amp will put out 1000w @ 1 ohm.   Then, It showes a diagram, that uses the two signal outputs capable of a minimum of  2 ohms for each output. Im thinking there is a way to wire up two 4 ohm subs to show the amp a 2 ohm load. If I do this to both signal outputs, wouldn't that equal a 1 ohm load?

I know if you wire 1 sub it = 4 ohms \ 2 subs = 2 ohms \ 3 subs = 1 ohm \ and 4 subs = .5 ohms if you run them on the same curcuit, but if  I put two subs on each of the two circuits wouldn't that be 2 ohms per circuit, or would that still be a .5 ohm load?     

                                                                       posted_image HELP!!!!



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XPLOD 1




Posted By: par3721
Date Posted: September 27, 2002 at 3:15 AM

put two subs on each channel wired parallel and theres your 2 ohms for each channel if you bridge each channel.

otherwise put two subs wired parallel on the left > 2 ohms

and the other two on the right  parallel > 2 ohms this will send 250w to each sub

but if you wire 2 subs in series = 8 ohms

and the other 2 in series = 8 ohms

then wire each set parallel and bridge (all 4 subs) this will = 4 ohms and still be pretty loud considering there will be 4 sub getting the same wattage.

heck try both see what you think.

someone correct me if im wrong





Posted By: Velocity Motors
Date Posted: September 27, 2002 at 8:57 AM
Not familiar with Sony stuff, but is there just one (-) and one (+) terminal on the amplifier for output ? If there is just one of each ( being and digital amp ) then you can only wire this system in series.Someone correct me if im wrongposted_image

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA




Posted By: mytloud1
Date Posted: September 27, 2002 at 10:47 AM

he could wire it up parallel, but if the amp only has one + and one - this would prove to be kind of a pain in the ass. my class d sub amp has two of each on the outside, but if you look inside the +'s are joined, and the -'s are also. but the way it looks to me so far, the best load he can do and be safe is a 4 ohm load. or if you wanted to be an outlaw, run it at .5 ohms for a while and see what it does. i, like jeff, am not really familiar with sony, so i cant really say how much abuse it will take. with my own though, i am able to play three 12"dvc subs run in parallel all the time, but when i added a fourth one, it wouldnt take it. i can only run it that low playing my peak frequency at spl events, not for everyday use.





Posted By: Velocity Motors
Date Posted: September 27, 2002 at 10:49 AM
From my experience the Class D amps do not like a load less than 2 ohms, they end up shutting down. The manual says that the amp is capacble of running 1 ohm ( very unlikely though ) try this, the worst thing that could happen is that the amp goes into protectionmode and resets it self after about 30 seconds.

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA




Posted By: Xplod 1
Date Posted: September 27, 2002 at 1:19 PM

posted_imageThanks for all your advice guys!

  By the way, the re are two +, and two - ,  speaker outs on the amp



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XPLOD 1





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