^^^ Exactly. Impedance and "reactive" resistance is basically the same thing. Regular resistance, like a resistor in a circuit, doesn't change with a given frequency, voltage, current, etc. Any coil wound resistor/resistance has an impedance that changes with the AC frequency that goes through it. DC current sees a constant resistance value though and is typically lower than AC impedance. As Julian mentioned the impedance value that is listed is basically like an average for a given range of frequencies. 1.4 ohms would be about 2 ohms nominal impedance. You are measuring that resistance with the subs disconnected from the amp, correct? Three dual 2 ohm subs could be wired to .33 ohms (all parallel), 1.33 ohms (series coils/parallel subs), 3 ohms (parallel coils/series subs), and 12 ohms (all series). Can be viewed here.