Looks like you guys are having fun! Used to have a low power competition system in my Supra, but both are long gone. Now I'm replacing the 8" door subs in my z06 and prefer to keep the Bose Head Unit and 2 ohm 100w amplifiers in each door. Comparing the Skar IX-8 wired in parallel to drop to 2 ohms with a sensitivity of 83.2 dB VS the FSX8 at 4 ohms and sensitivity of 94.5 dB. I've read that every 3 dB is twice as loud. So, would it be better to use the IX-8 at 2 ohms with less sensitivity or the 4 ohm speakers at higher sensitivity and half the amp power? What do you guys think? Cheers!