i have a yamaha rx671 av amp and a svs pc ultra 13. the yamaha isn't part of the main system, it's used elseware. however it is the only unit with graphical frequency response plotting. so i'm thinking about connecting the two then run peq setup. subs own peq off. viewing the response on the tv, getting an idea where valley and peak are. then removing yamaha in place of the lexicon mc 8, then enabling the peq on the subwoofer itself . one question does the 671 display unaltered response for the sub? this could be alternative to demoing sms 1 to use as auto reaponse plotter. excuse grammer sent from phone.