whatever sounds the best to YOUR ears.. do yourself a favor, set the amplifier(s) gain(s) with all of your EQ and all that other happy horsefeathers tuned completely flat on the H/U.. then you shouldnt event need to add the DB's on the H/U
i set mine at 170 db. that way i can enter comps with my volfenhags//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif