Axiom Home Page Forums General Discussion Technical Questions Graph testing again, I'm confused, so is mojo :)

Randy, the crossover done by most receivers(including the 2805)rolls off the sub at 24dB/octave above the selected crossover frequency and rolls off the speakers at 12dB/octave below that frequency(this is said to give a good blend in the crossover area). So, as is often mentioned, this is a roll-off, not a very sharp cut-off. The result should be that the M80 cones would still be moving at those low frequency rates of vibration but the extent of the movement should be greatly reduced(i.e. they shouldn't be moving "like crazy"). Have you watched the cone movement with and without the 80Hz crossover to see if there's a visible difference? Another check is to listen in the two situations to determine if the low bass output is in fact reduced with the 80Hz crossover in effect.