From Soundstage.
"The most significant change is in the crossover, which Ian has been working on throughout the years and has deemed significant enough now to warrant the v2 designation. Ian tweaked the crossover to achieve better linearity, both on- and off-axis, in his quest to produce a speaker that’s as close as possible to his design ideals: flat frequency response, high output capability, and low distortion. Although the M80 v2 is claimed to be more linear than the M80ti, the rest of the specs remain the same. The claimed anechoic sensitivity is 91dB/W/m, and the nominal impedance is said to be 4 ohms."
