The designer of the LSA 50/80/Statement has some links to measurements and his small YouTube channel on DIY Audio where he’s a pretty popular member, but seems this is a new designer and not the one who did the LSA signature line. Frequency response for the 50s was pretty even from the graph he shared, 80s seem to tip up in the treble a few dbs to give a more refined or detailed sound I imagine.
@amorstereo looking forward to some early thoughts on the 80s once you receive them.