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Wiring 2ohm dual voice coil 15’s


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Grandhustle 
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Posted: January 12, 2005 at 2:22 PM / IP Logged  

I recently wired 2 2ohm dual voice coil Kicker Comp VR15's to my 2400watt RF 801s(2-channel) amp. I know they need to be wired in series and I thought they were, but it still sounds wrong at high volumes like when I had them wired in paralell(which one at time is exactly what the 15's are capable of and what I expected them both to sound like now). So this is how I have them wired.

Left Sub: one negative post to a positive, the other positive to the left channel positive on the amp, the other negative to a positve on the right sub

Right Sub: one negative to a positve, the other negative to the right channel negative on the amp, the other positive to a negative on the left sub

Anybody tell me what I'm doing wrong? Any help is appreciated, Thanks

J-G

uthinkuknoaudio 
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Posted: January 12, 2005 at 4:00 PM / IP Logged  
Well, it sounds to me you are wiring them in a series. You have them @ 4 ohms. If you had them parallel, you'd be down to 1 ohm. Is that 2 channel amp 1 ohm stable x 2? One thing is for sure, you won't get 2400 W out to those kickers @ 4 ohms. You might have to bridged the amp and have the subs run together. Then you would series them up to 4 then the signal gets split and you'd have a 2 ohm load for the woofers. Most amps are 2 ohm stable.
"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.
Francious70 
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Posted: January 12, 2005 at 4:57 PM / IP Logged  
I'd wire them in series/parallel for a 2 ohm load.
Paul
stevdart 
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Posted: January 12, 2005 at 5:11 PM / IP Logged  

Wiring 2ohm dual voice coil 15’s -- posted image.

You have a 8 ohm load bridged onto the amp.  You can't make 4 ohm total with this model so that is what you have to deal with.  (The amp wouldn't handle a 2 ohm bridged load.)  You just might have the amp at clipping level to get the output you're trying for...and it is showing in the sound.

hurtado_roberto 
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Posted: January 12, 2005 at 5:29 PM / IP Logged  

So you should wire them like this:

Wiring 2ohm dual voice coil 15’s -- posted image.

but the RF 801S amplifier does not support a 2ohm load bridged.  I had one last year and it kept turning off (protect mode b/c of overheating). So you can run just one speaker with this amplifier to see how it sounds like this:

Wiring 2ohm dual voice coil 15’s -- posted image.

This will give you a 800watt RMS x 1 bridged.  You can buy another 801S later on if you don't feel like it's enough db. These are 2 x 2ohm not 2 x 4ohm subs right.  What's the total RMS of each speaker?

Poly Dollies
Grandhustle 
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Posted: January 13, 2005 at 1:15 PM / IP Logged  
The specs on the amp say:
200 W X 2 @ 4 Ohms RMS
400 W X 2 @ 2 Ohms RMS(<--I think that's what I'm aiming for, any ideas on how that would be wired?)
800 W X 1 @ 4 Ohms Bridged RMS
It doesn't say that it's stable at 2ohms bridged, that JL website only shows bridged set-ups, no 2-channel.
J-G
stevdart 
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Posted: January 13, 2005 at 3:59 PM / IP Logged  

You can't make 4 ohm total with this model

...as I posted above.  You might want to look at it again, or for the first time.  And when specs show a bridged rating at 4 ohms, and don't show a bridged rating at 2 ohms.....that means there is no rating at 2 ohms bridged......which you take as meaning you can't put a bridged 2 ohm load on the amp.

hurtado_roberto 
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Posted: January 13, 2005 at 5:02 PM / IP Logged  

So you should just use one speaker and buy another amp later for the other one.

There is no efficient way you can produce a 4ohm load with all 4 voice coils connected.

Does anyone know if you can just connect one voice coil on each speaker?  If you can then you can bridge one voice coil on each speaker in series with the other for a 4 ohm load.  You would be using 2 speakers but I'm not sure how fast your voice coils would burn out or if there's enough excursion of the speakers.

Can you list the specs of your speakers next time you post.

Poly Dollies
Grandhustle 
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Posted: January 13, 2005 at 5:20 PM / IP Logged  
  • Polymineral cone
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  • Perimeter Venting--The perimeter venting cooling system continuously pumps hot air away from the voice coils, replacing it with cool outside air.
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  • Top-mount depth: 7 1/4"
  • Sealed box volume: 1.8-5.2 cubic feet
  • Ported box volume: 3.0-5.0 cubic feet
  • DYohn 
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    Joined: April 22, 2003
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    Posted: January 13, 2005 at 5:29 PM / IP Logged  
    As your amp is not 2-ohm stable into a mono load, either wire the speakers for an 8-ohm load as described above, or wire each one as a 4-ohm load and connect in stereo, one to each channel.  Either way is the same net result: 200 watts to each speaker.  This will work fine.  Yes, it is possible to wire only one VC, but by doing this you cut the speaker's power handling capability in half.
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