Hi there, its me again with the not so bright questions. If I a a power amp to my receiver, does my receiver then works only as a processor? In other words if my receiver is 100wpc and the power amp is 75wpc, does this mean 175wpc of power is sent to my speakers or is it only the power of the power amp? When one adds a power amp does the wattage of the receiver become futile? Pls educate me. Thanks.