How to wire a DVC Sub?

JojoD818 · 20th August 2003, 05:08 PM

Hi there,

I know this may sound stupid but I'd rather ask it than risk my amp.

I have one (1) 12" Sub with dual 8 ohms coils. Now, how do I wire it to my amp? Can I use the first coil for the left amp channel and the second coil for the right amp channel? I mean using a stereo power amp to power 1 dual voice coil sub.

My amp has a stereo/mono switch btw.

Any suggestions?

JojoD

leadbelly · 20th August 2003, 05:37 PM

Yes.

jleaman · 20th August 2003, 11:44 PM

you can use the left to power one coil and the right to power the other coil BUT the inputs for the left and right have to be the same channel either the left or right. if you don't one coil will blow up because the amplifier might tell it to go one way and the other to go the other. meaning BROKEn voice coil.

i would bridge the amplifier and run the coil in parallel.

Ron E · 21st August 2003, 01:28 AM

Lets say you have a REALLY strong amp and you put 50 amperes into the 8ohm coil. Force generated by the motor is Bli and Bl~10 so about 500 Newtons - 10Newtons is ~2 pounds so ~100lb.

For a more typical amp the force is perhaps 10lb.

The dual voice coils are interleaved, not separate, so you are not likely to "break" the coil....

Lots of speakers use a DVC sub driven by stereo signal. It will be fine.

mikee12345 · 21st August 2003, 02:16 AM

if one coil is going one way,and one coil the other,that means that the bass signal must be opposite.

i dont think much bass is in antiphase across left and right channels

-or did i completely miss the point

ron E nice point i love equations heheh FBI <points hand with flux being the thumb,i the 3nd finger, etc etc.. >

JojoD818 · 21st August 2003, 03:03 AM

So to more or less make the signals from the left and right equal, can I just switch the amp's mono/stereo switch? So I don't risk confusing the two coils?

JojoD

pinkmouse · 21st August 2003, 08:23 AM

Yes.

kingdaddy · 21st August 2003, 02:44 PM

Don't worry about 2 different signals going to each voice coil it wont hurt anything, they will just cancel each other out and you wont get any sound. But do be careful of the load the amplifier sees, some amps don’t like 2 ohm loads. Here is a good article that will explain everything you need to know about wiring DVC.

Must Read
http://www.adireaudio.com/tech_papers/dvc_wiring.htm

daatkins · 21st August 2003, 04:35 PM

I'm with Kingdaddy & Ron E on this one! The signal difference between the two voice coils will cause a cancellation of magnetic flux so there won't be two opposing forces trying to pull the cone in different directions.

Nice one,
David.

JojoD818 · 21st August 2003, 07:55 PM

Guys,

Thanks a lot! That article was a real "Must Read" one. Now I understand it much clearer.

Thanks again for all the replies!

JojoD

20th August 2003, 05:08 PM	#1
JojoD818 diyAudio Moderator Join Date: Mar 2003 Location: searching...	How to wire a DVC Sub? Hi there, I know this may sound stupid but I'd rather ask it than risk my amp. I have one (1) 12" Sub with dual 8 ohms coils. Now, how do I wire it to my amp? Can I use the first coil for the left amp channel and the second coil for the right amp channel? I mean using a stereo power amp to power 1 dual voice coil sub. My amp has a stereo/mono switch btw. Any suggestions? JojoD

20th August 2003, 05:37 PM	#2
leadbelly diyAudio Member Join Date: Dec 2002 Location: Calgary, Alberta	Yes. __________________ Aerodynamics are for people who can't build engines. Enzo Ferrari

21st August 2003, 01:28 AM	#4
Ron E diyAudio Member Join Date: Jun 2002 Location: USA, MN	Lets say you have a REALLY strong amp and you put 50 amperes into the 8ohm coil. Force generated by the motor is Bli and Bl~10 so about 500 Newtons - 10Newtons is ~2 pounds so ~100lb. For a more typical amp the force is perhaps 10lb. The dual voice coils are interleaved, not separate, so you are not likely to "break" the coil.... Lots of speakers use a DVC sub driven by stereo signal. It will be fine. __________________ Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan Armaments, universal debt, and planned obsolescence--those are the three pillars of Western prosperity. —Aldous Huxley

21st August 2003, 03:03 AM	#6
JojoD818 diyAudio Moderator Join Date: Mar 2003 Location: searching...	Running in mono So to more or less make the signals from the left and right equal, can I just switch the amp's mono/stereo switch? So I don't risk confusing the two coils? JojoD

21st August 2003, 08:23 AM	#7
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	Yes. __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort


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20th August 2003, 11:44 PM	#3
jleaman Banned Join Date: Apr 2002	you can use the left to power one coil and the right to power the other coil BUT the inputs for the left and right have to be the same channel either the left or right. if you don't one coil will blow up because the amplifier might tell it to go one way and the other to go the other. meaning BROKEn voice coil. i would bridge the amplifier and run the coil in parallel.

21st August 2003, 02:16 AM	#5
mikee12345 diyAudio Member Join Date: Nov 2002 Location: NZ	if one coil is going one way,and one coil the other,that means that the bass signal must be opposite. i dont think much bass is in antiphase across left and right channels -or did i completely miss the point ron E nice point i love equations heheh FBI <points hand with flux being the thumb,i the 3nd finger, etc etc.. >

21st August 2003, 02:44 PM	#8
kingdaddy diyAudio Member Join Date: Mar 2002 Location: Fort Worth, Texas	Don't worry about 2 different signals going to each voice coil it wont hurt anything, they will just cancel each other out and you wont get any sound. But do be careful of the load the amplifier sees, some amps don’t like 2 ohm loads. Here is a good article that will explain everything you need to know about wiring DVC. Must Read http://www.adireaudio.com/tech_papers/dvc_wiring.htm

21st August 2003, 04:35 PM	#9
daatkins diyAudio Member Join Date: Aug 2001 Location: Bath, UK	I'm with Kingdaddy & Ron E on this one! The signal difference between the two voice coils will cause a cancellation of magnetic flux so there won't be two opposing forces trying to pull the cone in different directions. Nice one, David.

21st August 2003, 07:55 PM	#10
JojoD818 diyAudio Moderator Join Date: Mar 2003 Location: searching...	Now I get it... Guys, Thanks a lot! That article was a real "Must Read" one. Now I understand it much clearer. Thanks again for all the replies! JojoD

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