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DVC subs


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donkason 
Copper - Posts: 189
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Posted: April 11, 2003 at 2:57 PM / IP Logged  
I have 3 JL 12 w3's and a soundstream reference 700s amp. The subs have dual 4 ohm voice coils. I wanted to run them in a series which would give my amp a 2.67 ohm load. I hooked them up and it sounded poorly. Everything else seems to be in place and properly working. My question is when wiring in a series does it matter which voice coil you hook together, run one wire to the negative to the positive one on coil, and the other one is hooked up to the amp. I don't know if one side is different than the other. Any suggestions would be great. Thanks
J. Mike Perkins
bberman1 
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Posted: April 11, 2003 at 4:36 PM / IP Logged  
If you run them in series you would have a 24 ohm load. I think your talking about series-parallel which would give you a 2.6 ohm load. Here is a diagram which shows how they should be wired. http://www.audiobahninc.com/tech/wiring/Series_Parallel_dual_4_ohm.pdf
wvsquirrel 
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Posted: April 11, 2003 at 9:34 PM / IP Logged  
I'm losing my mind. Please ignore me right now. I keep reading the wrong thing!
Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
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donkason 
Copper - Posts: 189
Copper spacespace
Joined: December 27, 2002
Location: United States
Posted: April 11, 2003 at 11:27 PM / IP Logged  
I believe that is how I had it hooked up the first time, like the graph shows. I unhooked all of the second coils and ran them as SVC 4 ohm speakers in a series which should give me a 1.33 ohm load. it sounded much better. but I am not sure if it is o.k. to run a dvc speaker using only one voice coil? Another question is that I have heard people say soundstream amps don't really work well until they have a load between 1/2 ohm to 2 ohms. is this true. I had the amp dyno tested at 823 watts rms at 2 ohms and I figured 2.67 load would be enough to kill those JL's at 2.67. Any other suggestions. I spent about 3,500 bucks on my system and it is breaking my heart to not have it give me double vision at full volume.
wvsquirrel 
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Posted: April 11, 2003 at 11:39 PM / IP Logged  
Don't run only 1 coil of a DVC, you'll fry the subs.
Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
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donkason 
Copper - Posts: 189
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Joined: December 27, 2002
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Posted: April 12, 2003 at 6:38 AM / IP Logged  
Is there any other way to get the load lower than 2.67 ohms and more than .66. I am not a pro at this and wonder if there is any unconventional way of wiring this up. If not I would wiring my amp up to .66 be o.k. if I put enough fans on it to simulate a tornado.
Velocity Motors 
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Joined: March 08, 2002
Location: Manitoba, Canada
Posted: April 12, 2003 at 6:46 AM / IP Logged  
2 DVC drivers with Voice Coils in Parallel / Parallel
Connecting the voice coils of each driver in parallel (+ to +, - to -) and the drivers themselves in parallel (+ to +, etc.) will result in the following impedances:
Dual-6 Ohm Subwoofers: 1.5 Ohms
Dual-4 Ohm Subwoofers: 1 Ohm
Dual-2 Ohm Subwoofers: 0.5 Ohm
 

DVC subs -- posted image.

Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
donkason 
Copper - Posts: 189
Copper spacespace
Joined: December 27, 2002
Location: United States
Posted: April 12, 2003 at 9:21 AM / IP Logged  
I have done that setup on my last system but now I have 3 subs instead of 2. Would it work to use one sub at 2 ohms and the other two at 8 ohms and wire them in a series. That way I could use both voice coils and have an impedance of 1.33 ohms. Or is that a sin to run subs with different impedances.
donkason 
Copper - Posts: 189
Copper spacespace
Joined: December 27, 2002
Location: United States
Posted: April 12, 2003 at 12:28 PM / IP Logged  
Don't worry anymore I am just going to buy a new amp that is 1/2 ohm stable mono. My other one sounded good on paper but not when put to the test. I hooked up 2 JL w6 12's to this amp and with a 1 ohm load and it outslammed my 3 12's by far. So I figured that has to be my problem, I am not pushing my amp hard enough, and with dual 4 ohm voice coils I don't have the flexability to wire it the way I want. Thanks for all of the help.
J. Mike Perkins

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