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Would it cause problems if you had one dual voice coil and a single voice coil on an amp (besides that the power draw would be different because of the resistance). Im just wondering if it would mess anything up?

 
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I don't think it should be a problem. If this is the case, how would you connect your speakers to your amp?

The only way I could see a problem is if the ohm load is less than what the amp can handle.

There may be a problem if you wire the speakers together and send one channel through both speakers. If this was the case I would not recommend it cause I've never heard or seen it done before, but it's possible it won't cause a problem.

I've wired a 4 ohm sub and a 3 ohm sub to a 2 channel MTX amp before and it never had a problem. But like I said, if you wired them together and sent one channel through them both, I dunno what it would do.

Hope this helps.

 
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have to worry about power distribution, too.

lets say you have a 4 ohm DVC woofer, and a 4 ohm SVC woofer (we wont go into box mechanics here, but its definitely something to worry about too). one wiring option would be to wire everything in parralel, presenting a 1.33 ohm load to your amplifier. if your amp is 1 ohm stable, your set as far as the amp cares. but what about teh woofers?

again, for the sake of argument, lets say the amp puts out 600 watts at 1 ohm. each coil is being shared equally among that power, meaning each voice coil gets 200 watts, bottom line one woofer gets 200 watts, the other 400 watts. this may or may not be desireable, depending on yoru install and application.

as a second example, lets wire the DVC woofer in series and then in parralel with teh SVC woofer. this will present a 2.66 ohm load to the amp. let us consider the woofers. we know that parrallel among 2 identical woofers (or voice coils) will distribute power equally, but what about our woofers? one is 8 ohms total, the other 4 ohms total. that means the 4 ohm woofer will take 2/3s the power, leaving 1/3rd the power for the 8 ohm speaker. with our trusty 600 watt amp (assume 600 watts at 2.66 ohms) the 4 ohm woofer will get the 400 watts, and our DVC will get the 200. FURTHERMORE! that 200 watts will be distributed evenly among the two voice coils, meaning that each coil gets 100 watts.

again, if this turns out to be idea for your application, then your set. more often than not, it wont be......

 
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Reason I ask (and I have it installed right now and its working fine) is I went and bought what I thought was a DVC from a shop but they found out when they took it out of the box that it was a single, so Im using the single till they get the dual in a couple of days. It seems tow ork fine so I should be ok.