You might want to search or post over in the Audyssey forum at AVS about using an extension on the mic cable. AFAIK each mic is calibrated for it’s specific receiver so I’m not sure extending the cable might not have some effect on it’s performance. Might not but doesn’t hurt to be sure.

3M80 2M22 6QS8 2M2 1EP500 Sony BDP-S590 Panny-7000 Onkyo-3007 Carada-134 Xbox Buttkicker AS-EQ1