Have you tried setting all speakers to small, and setting the crossover at 80hz? Can't comment on raising the 60's as I don't do that...:)

Randy

60's 150 350 4-qs8's
denon 2805

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85