I wired my Dayton 12"dual voice coil subs individually in series, then I connected them together in parallel. They only say dual voice coil on them. I don't know if they are 2 ohm or 4 ohm but when I checked them they each check out to be 10.4 ohms when wired in series. Then when I connected them together I got 5.2 ohms. My little Alpine amp is bridged and puts out 175 watts into 4 ohms. I can feel the bass but the resistance for each sub seems kind of funky. Any comments?