Newbie with REW, quite odd result

Hi guys

I'm using Rew since a couple of days. I've a Velleman Avm2050 and a Audyssey Mic

the graph below is taken with a Audyssey Mic setup. no problem with my Realtek 887 . I calibrated it without any issue and I've the related cal file

I got this kind of odd result

the red line is the 20-200 Hz , 1M lenght test with Marantz Sr5009. No EQ , large speakers (no cross-over)
the blue line is the 20-200 Hz , 1M lenght test with Marantz Sr5009. No EQ , small speakers (cross-over 80)
the blue line is the 20-200 Hz , 1M lenght test with Marantz Sr5009. No EQ , small speakers (cross-over 250)

front speaker are 70 hz. -3 db as reference frequency response

the sub is OFF

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where are the cross-over cuts? onder:

PS: the cross-over works, my ear hear the difference