Trim on Flat
Crossover on Bypass (since your receiver is most likely handling this.

Volume (Gain) 10 o'clock seems to high, unless you have the sub level on the receiver way low. Axiom recommends midway of the 9 o'clock position to start, which if you look at the dial you will be around 7 o'clock or so.

My room is 30 x 31 x and my 600 volume is around 8 o'clock, and -2dB on the Denon.

How are you basing that you think it is to low? Have you tried movies with low LFE, or are you basing it on music.

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