I'm guessing you mean outputs. The two outputs are internally parallel, meaning it's still just one channel. What load is the amp stable at? Probably 2 ohms?

 

2 and 1 ohm...

 

If you have two DVC 4 ohm subs, wire the voice coils on each sub in parallel (giving you 2 ohms per sub) and then connect one sub to each of your two amp outputs, which will be wiring them in parallel. This will give your amp a 1 ohm load so it can reach it's full potential.