JohnK, can you read above a few pages and possibly comment on what is going on with my situation. When I unplug the LineIn cable from my 600 sub with the sub totally turned off and unplugged, my freq graph shoots up in the lower frequencies like the gain was turned up greatly.

I have my subs daisy chained from my Denon

Denon...ep350v3.....ep350v3...........ep600v2

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