I mainly listen to ordinary CDs (genre:classic rock), what happens when I add a subwoofer to my 2 channel setup? Will the sub produce any output?
(I have a HK AVR7200: surround sound setup for me is somewhere in the future)

And If a sub is recommended, can a 160 watt or 175 watt amp be adequate?
So far I am considering a 8 or 10 inch velodyne. I do not want overpowering sub-bass but I want it to be noticed. My listening volume is is midway (from 0 to 10 scale).

Thanks,

Intune