So i have an Fi Bl 18 and a Hifonics BRZ 1700.1d. i bought them from a friend and he told me he had it wired to one ohm but when i asked him what he did to wire it down, he could not remember, which made me skeptical. I have read that of the dual 2 ohm Fi Bl, the coils read an actual 1.7-1.8...