i got my dso nano, did my math and looking at the scope, matching everything up, got it set to just before clipping at 40hz(where everyone says to set the sine tone when tuning the sub). so now i throw in a song and i hear next to no bass, the sub (boston acoustic g3 10") is barely moving. when i think about it, i would think i should prob tune between 55-80hz because thats more so where a lot of bass seems to lie. whats the deal? help me understand.