Cheers guys,just seen that on my kef instructions,they also say set sub frequency to 80hz but when i check my amps settings made through auto set up it has been set at 160hz,default settings on amp is also 80hz,choices being 40,60,80,90,100,110,120,160 or 200hz where should it be?Also when running the yamahas test sounds i'm getting no sound at all from sub but is ok if i run test sounds from a disc????????? Am borrowing a sound meter tomorrow to set up manually as some of the distances where out too,so many settings so little time!!!! EDIT- Just read my actual kef instructions and they say set at 120hz(online version says 80!)