The output of the M80 is actually higher than the M40 at 40Hz, but the overall output of the M80 is higher than the M40 through the rest of the amplitude response. The M80 design is a slow roll off starting at a 60Hz where as the M40 is a steep roll off starting at 40Hz. In the listening environment the M80 has more and deeper bass than the M40 because of this, but both have impressive deep bass and even more impressive when given consideration that they are 6 1/2" woofer designs.
Ian Colquhoun
President & Chief Engineer
