HM, welcome. Pay especial attention to Alan's point about the connecting straps on the speaker terminals. This has happened here at least twice(two have admitted it)in the past few years. The connectors were loose, and since their previous speakers(like your M40s)didn't have two sets of speaker terminals, they didn't realize the necessity for having them tightly connected. Unless both your M60s have internal wires loose(highly unlikely), this is the first thing to suspect(your 1014 almost certainly has more than enough power for the M60s, which don't require any more than the M40s). Your M60s have excellent high frequency response.
