Whatever happened to Graphic Equalisers in Hi Fi? In the 70's and 80's Hi Fi amps had rows of them, sometimes 16 frequency bands for for each channel. Currently they have a very low profile, a lot of stuff doesn't even have a bass or treble control! Why? They are good enough for concerts and PA systems! If you share the view that rooms and speaker resonances have possibly the biggest impacts on listening quality they are an ideal means of mitigating this. So where are they? Is it a fashion thing? Sure they degrade the signal path, but by how much in the real world, I mean would you even notice it in a typical system (with resonant frequencies booming around your front room)? The pros seem to outweigh the cons to me. Why spend thousands on room accoustics, just buy an equaliser!