look either on the box of the back of the sub, should say wheter they are dual 2 ohm or dual 4 ohm all cvrs are dual voice coil. if its dual 2 ohm you ned an amp that does power at 2 ohms if its dual 4 youll need an amp that does power at 1 ohm.
for subs most peopple run them off of a mono amp, thats 1 channel, they are more effecient and when you wire the subs correctly thats all you need you should read up some more about sub wiring before attempting this, or have someone who knows what they are doing to help you.