Everything on the reciever is set to flat.The Yamaha won't work because it's a graphic equalizer.Iv'e already tried one of those.A Audio Control Richter Scale Bass equalizer.The problem with them is that they affect to broad a frequency range.Thats why i'm intrested in the SAE paremetric equalizer which can adjust the bandwith that you want corrected,not only the frequency.Its about the only one that I can find on Ebay for home audio.All the others are for professional or car audio.