difference between dvc and svc?

If you do that, the power capacity for each sub will be one half of the rated power.  If each sub is rated at, say, 300 watts, then the power total for two subs, using only one voice coil on each one, will be 300 watts.  Does the amplifier put out 300 watts at 2 ohms?  That's the question you have to answer, which is why I asserted above that you probably had power vs. power handling already figured into the equation when you originally chose the SVC subs.

Oops, I missed the part about it being a mono amp.  Thanks for the correction Dave.

I'm not saying it doesn't hold potential for change, but power and sound are two different things. A 2 ohm load won't "sound" any better than a 4 ohm load. Volume may be different (i.e. my cousin's 1000 watt 15" is volumetrically louder than my 10" sub) even though i'm wired at 2, and he at 4.

Also, you're dealing with electrical pieces here. The more power you force from it, the less the life. Not to say a 2 ohm load will die next week, where a 4 will live a month, but as a person that repairs electrical equipment, I can't help but mention it.

Stick with Haemphyst, Stevdart and Forbidden. 9 times out of 2, they'll put you on the right track