Let me try to be specific as possible. I have the focal 806 bookshelves. With a small 75w Phillip sub. Not much but it works. And a cheap Sony STR-DG510 receiver. Pushing 90w a Chanel. While listening to music I am able to get the sub and the L/R to sound. Able to get great sound from the focal 806. When I go to watch a Netflix show or movie have try what I believe most settings on the receiver and not able to get the sub to sound just L/R. Any way you guys know of getting the subwoofer to come in while watching movies on a 2.1 set up? New here. Thanks for any help.