I find it hard to believe the Onkyo does not have small/large speaker settings in the setup section. It is possible that by setting the crossover to 90hz, tells the receiver the speakers is "small", just have never seen that...

If you set the back surrounds to 90hz, what was it at before you changed it? Also, all your speakers should be set to small, or 80hz for starters, depending on their specs.


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