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View Full Version : 1-12 running both voice coils, or 2-12 running one voice coil??



ajax012400
03-14-2006, 08:20 PM
I've 2 MB Quart RWE 304s that will be powered by an Infinity 611a. My question is about the SQ and SPL of running both coils on one or one coil on both, eventually I'd like to get another 611a and run both coils on both speakers.

smd4life
03-14-2006, 08:24 PM
need more info... are you talking about only using one coil on each sub?

ajax012400
03-14-2006, 08:26 PM
Yes, trying to keep a 2-ohm load..

smd4life
03-14-2006, 08:29 PM
runing the amp at 4 ohms and using all the coils would most likly be louder and sound "better"

Loudrango112
03-14-2006, 08:32 PM
Um... dont run just one coil on each sub it its ment for 2...

ajax012400
03-14-2006, 08:32 PM
I've an ohm meter and wire.....need guidance on achieving 8 ohms per sub properly.

smd4life
03-14-2006, 08:34 PM
someone post a pic for him...

Chevyaudio
03-14-2006, 08:35 PM
You can run only one coil...you have to cut the RMS in half though. I dont recomend doing that unless you really know what your doing.

saywhat?
03-14-2006, 08:37 PM
no, dont run one coil if its a dual vc, period. EVER. PERIOD

Meka
03-14-2006, 08:37 PM
Yeah running 1 coil changes the parameters of the sub. Actually i ran my apxx off one coil for awhile because i thought the other was fried...when it wasnt.

MikeyB
03-14-2006, 08:37 PM
http://www.rockfordfosgate.com/rftech/wiringwizard.asp

Meka
03-14-2006, 08:38 PM
no, dont run one coil if its a dual vc, period. EVER. PERIOD
And the logic behind this is...?

Chevyaudio
03-14-2006, 08:38 PM
no, dont run one coil if its a dual vc, period. EVER. PERIOD



Its possible, and you can do it without hurting the sub, but you have to know what your doing. As Mikey said it completly changes all of the t/s parameters of the sub.

smd4life
03-14-2006, 08:40 PM
here you go second one from the top...
http://www.maaudio.com/sub/techsupport/boxparameters/WiringSubwoofers.html

ajax012400
03-14-2006, 08:47 PM
Thanx for the input and the Fosgate link.... After I build a box for the Quarts I'll be constructing one for a couple of Fosgate Punch DVCs (old school) that have been collecting dust in my closet.... Thanx again...

Meka
03-14-2006, 08:49 PM
hehe mikey

MikeyB
03-14-2006, 08:52 PM
hehe mikey

haha, I see what you mean :D

nVRuckus
03-14-2006, 09:37 PM
Um... dont run just one coil on each sub it its ment for 2...
yup running 1 VC on a 2 VC sub will make the sub prematurely fail. Might not happen in a month but sooner than if you ran it on both VC.

ajax012400
03-15-2006, 08:53 AM
Removed both subs, wired per Fosgate diagram and ended up with a 6 ohm load per sub, 3 ohm with both... hmmmmm. Checked twice...same results. Louder than one running both coils and more accureate and smoother than 2 running one coil Interior lights not dimming at same volume.... Thanx again.
Also running Infinity kappa 6.5 components front, kappa 6.5 co-ax in rear from a Fosgate 50x4.... from a kenwood Excelon head unit.

theCybe
03-15-2006, 09:11 AM
^ phew, saved another one from the recone pile.

There's nothing wrong with running your subs at a higher impedance - in fact, many people argue the benefits.

squeak9798
03-15-2006, 04:26 PM
yup running 1 VC on a 2 VC sub will make the sub prematurely fail. Might not happen in a month but sooner than if you ran it on both VC.

That is 100% untrue. Not sure where you heard it...but you heard completely wrong.

The Ascendent Atlas is a prime example. Essentially all that subwoofer is is a dual voice coil subwoofer, only instead of powering both coils they only have you power one and use the other as a means to adjust the Qes (which you can do with any DVC). So, by your logic, the Atlas is inherently prone to premature failure :waycrazy:


However, as was mentioned...it is not recommended to only run one voice coil on just any ole sub as the parameters of the subwoofer will change significantly, and things like the recommended enclosures sizes will no longer be accurate. But physically it is possible to do with no damage, premature failure or otherwise.