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wiring 4 12's


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Xplod 1 
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Member spacespace
Joined: September 25, 2002
Location: United States
Posted: September 25, 2002 at 9:04 AM / IP Logged  

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?

xplod 1
Velocity Motors 
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Joined: March 08, 2002
Location: Manitoba, Canada
Posted: September 25, 2002 at 10:19 AM / IP Logged  

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 wiring 4 12's - Last Post -- posted image.

Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
djfearny2 
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Posted: September 25, 2002 at 7:03 PM / IP Logged  
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)_
Xplod 1 
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Member spacespace
Joined: September 25, 2002
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Posted: September 25, 2002 at 9:13 PM / IP Logged  

wiring 4 12's - Last Post -- posted image.REPLY:  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?     

                                                                       wiring 4 12's - Last Post -- posted image. HELP!!!!

xplod 1
par3721 
Member - Posts: 26
Member spacespace
Joined: April 29, 2002
Location: United States
Posted: September 27, 2002 at 3:15 AM / IP Logged  

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

Velocity Motors 
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Joined: March 08, 2002
Location: Manitoba, Canada
Posted: September 27, 2002 at 8:57 AM / IP Logged  
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 wrongwiring 4 12's - Last Post -- posted image.
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
mytloud1 
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Member spacespace
Joined: May 20, 2002
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Posted: September 27, 2002 at 10:47 AM / IP Logged  

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.

Velocity Motors 
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Joined: March 08, 2002
Location: Manitoba, Canada
Posted: September 27, 2002 at 10:49 AM / IP Logged  
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.
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Xplod 1 
Member - Posts: 5
Member spacespace
Joined: September 25, 2002
Location: United States
Posted: September 27, 2002 at 1:19 PM / IP Logged  

wiring 4 12's - Last Post -- posted image.Thanks for all your advice guys!

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

xplod 1

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