Can a DVC run off a stereo amp

Is it ok to wire up a dvc sub to two channels of an amp, running each voice coil off each stereo channel?

Does a lpf make the signal mono?

I have been having this argument with a fellow installer but he tells me that both of these thing are true and ok.

Hopefuly someone can settle this debate for me.

Depending on the design of the LPF (low-pass filter), if it is stereo in, it should be stereo out. ( Is it a preamp/amp filter or a passive one between the amp & speaker?)

DVC woofers with 1 coil on the left ch & 1 on the rt. ch is okay to do, its actually less of a problem w/sub than full-range speakers used in home audio. Make sure the polarity is correct on both coils on the DVC & that you hook it up correctly. I had one that the manufucturer labeled the 2nd VC backwards, customer was t'd until I checked it & reversed the 2nd VC.

Think about it this way.....your front "stereo speakers"....do they provide the same signal, left to right....NO

Can 1 sub,(DVC) provide, or accept  a "stereo" signal.....NO

Your sub wont last but for just a minuite at best....

The only reason I can see doing this is if you have a two-channel amp that is not bridgeable....and they pretty much all are now.  Reason is this:  if the two coils of the sub were connected together in series instead, the impedance would be twice that of one coil.  The sub is then bridged across the two channels and that sub impedance load is split between the two.  Example, a DVC 4 ohm sub, wired in series to 8 ohm, bridged to the amp...each channel outputs at 4 ohms.

Compared to:  each 4 ohm coil connected to a channel, the amp outputs 2 X 4 ohms.  Same output either way.  The better way is to combine the left and right at the amp and provide the same signal at the same power to each coil.

So why would anyone want to have to worry that each coil is getting exactly the same voltage?  There are a lot of things that are possible, but just because there is a possibility that doesn't mean it's the best way to do it.

So, IMO, you are right...your fellow installer is wrong about the LPF and not-quite-right on the other count.

I can't see how sending different signals to 2 voice coils that are supposed to be working together can be ok.

It may not do any damage but it certainly can't be good for performance.

Here's a tech white paper written by Dan Wiggins of Adire that covers this subject and explains it very well.  http://www.adireaudio.com/Files/TechPapers/DualVoiceCoilDrivers.pdf

It seems that no harm, no foul will come of anything.  So I was not entirely correct above, as it seems you would not have to be overly concerned with getting both coil signals at exactly the same power level.