I pulled the 90 db SN from the Alpine website.
http://iweb.alpine-usa.com/pls/admn/...in=10&p_more=y
and
http://iweb.alpine-usa.com/pls/admn/...in=10&p_more=y
respectively
I can only guess that they also UNDER rate their amps as well, simular to Xtant / PPI.
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