Hi Guys, It seemed to be When I was running the Audyssey MulEQ calibration, it detected every speaker, but not the subwoofer (said "yes" for every speaker and "no" for the sub at the detection screen).
in order to check whether the cable is defective or not I rubbed my finger over the tip and heard noise from the sub with it ON (not in AUTO), so cable is fine.
the volume nob is set at 12 clock,
I turned to highest setting of crossover control on the back of the sub
Is there any other way I can check whether the subwoofer is working or not if the sub out channel is defective?
right now I am using RCA to RCA cable.
http://img.skitch.com/20100627-1dnjcyi7ssjyxdaswc1n8tkb26.jpg
http://img.skitch.com/20100627-pfbgnyp1frdpg634wd7mx423j1.jpg
Thanks