SVC means Single Voice Coil, which is normally in 4ohms especially for automotive use...
DVC means Dual Voice Coil which is normally in 4 ohms per voice coil. DVC can be configured in 2-Ohms by connecting the voice coils in parallel and 8 ohms by connecting the voice coils in series. Do not connect voice coils in different channels (ch 1 & ch 2) as this will have poor performance of the sub..
Do not have mis conceptions regarding DVC is better than SVC because some will say that "you have extra" voice coil in case the other one burns..technically you have 2 voice coils but when the other one gets busted, subwoofer performance will be affected... DVC only advantage is the flexibility in impedance range..
make sure your amplifier RMS ratings match your subwoofer.. Amplifier rating should be higher than subwoofer to enable it to drive the speaker properly.. Refer to RMS ratings and not to PMPO ratings which is deceiving in terms of actual power...
2ohms sub configuration is only applicable to 2-ohm capable amplifiers (mostly monoblock amps) since you can juice more power with 2ohm configuration.. but to be safe it is better to use the 4ohm configuration which is normally used