I have a question regarding the setup of my reciever. I am unsure of the best way to set levels. Would it be better to adjust the gain down so that the highest gain is at 0db and the others are at negative values or leave the lowest level speaker at 0db and raise the other levels? Also, I have long runs of wire for my rear surrounds (50ft of 12 gauge)all front speakers have 20 ft runs. Should I be compensating for the long wire runs in the delay?