Alan - I run the same sub (Outlaw LFM1 +)with my M22's and have found after multiple crossover experiments the 60Hz works best for my environment. I have always read to go ahead and test your setting parameters and finalize on the ones that you feel are optimum. Is there an element I've missed that would dictate a move back to the 80Hz?

FireGuy
M22V3/M3ti/M2V3/Omega Super 5/Aperion 5C/OutlawLFM1+Sub/Denon AVR1906/YamDVDC750/AS AMP110