FWIW, if I can chip in, the M-60 (and our other amps as well) have changed a bit over the last few months and years. You might try out a later set, or get the older set updated.
See also:http://www.soundstage.com/revequip/atmasphere_ma2ii3.htm
While these comments are regarding the MA-2, the changes that brought that to fruition apply to the smaller amps as well. Israel developed the concepts that fuel his speaker lineup on an older set of M-60s.
See also:http://www.soundstage.com/revequip/atmasphere_ma2ii3.htm
While these comments are regarding the MA-2, the changes that brought that to fruition apply to the smaller amps as well. Israel developed the concepts that fuel his speaker lineup on an older set of M-60s.