I ask my original question to Axiom, and yesterday I got petty much the same ansewer(see below) that you guys (Gene-Mr T-Toquemon-Peng-Nova-T Period and Kodes3 ) had for me . Now I have to wait a other 10 days before the renovation in our theater to be finish

. After that, I be able to enjoy movie on my big screen again.
Thanks to all of you !
Hi Pierre,
The M80Ti are indeed 4 ohms, the good news is that though not stated the AVR3805 has a robust power supply and will aloow for the operation of the M80Ti. This of course is subject to room size, so if the system is placed into and area of 3000 cubic feet or less, you will not need to drive the receiver hard to receive the output required for excellent coverage. If the area is larger and you do want to playback loudly, another amplifier would be best suited.
Bi-wiring does not have anything to do with the ohm load..
Hope that helps! Please don't hesitate to let me know if I can assist you with anything else.
Kind Regards,
Brent Tombari
Axiom Audio