I typically listen to movies with dialog at about 67-70db. Every onece in a while i will go as high as 75db for dialog. My speakers rarely go above 90-95db peak. Subwoofer with low frewuencies needing eq to sp0ound equal to speakers volume will be over 10db higher at the lowest octaves so my sub will hit over 100db sometimes. So if you listen like me, you will rarely see the jbl 3677 use more than 2 watts. A home speaker with 88db sensitivty in my system would require 31 watts to have equal loudness to the 3677 at 2 watts. So like cdy said, if you listen loud, the home speakers could run out of gas. But yeah, set avr center channel to -10db, then set left and right channels to +1-3db as a base, then just make sure they are all equal loudness at listening position.