Tarantula T4 Question??? About Subs?

Question??? about subs? - tarantula t4

I am acquainted with audio amplifier and subwoofer for another car, but I had a question to which more can a dual 1 ohm to make ,5-ohm sub? eg;
Soundstream Tarantula T4-15 15 "Dual 1 ohm subwoofer
or
Nightshade 12 "Dual 1 Ohm