Hello, My receiver, a Sony STRDB 870 is set up with cross over at 80hz, using the sub out socket into a REL Quake. Pleased with the sound. However, I have a query. On the set up menu, if I tab along, I find an option called ' LFE high cut' which can be changed. However, I am not sure what this is. I pressume this has something to do with using the high level input on the sub and running to the actual front speakers. Can anyone clear this up please. To clarify, my speakers are all set to small, crossed at 80hz. Do I need to worry about the high cut option or indeed change it? Thanks in advance, Captain Benefit.