Hi Feds, I have heard that M125 may in fact be based on the ICEpower 125ASX2 power conversion module, but I have not read a written confirmation yet. M125 appears to have the following power ratings:
125 watts @ 8 ohms/250 watts @ 4 ohms
The Rowland 2013 product brochure lists some more M125 specs, but not all is known about this amp yet:
http://jeffrowlandgroup.com/kb/getattachment.php?data=NTgxfEpSREcgUHJvZHVjdCBDYXRhbG9nIDIwMTMucGRm
Guido