I've tried many variations and have settled with all speakers to small and an 80hz crossover on the AVR.

Stymie, I'm a little confused on why you would use 40hz crossover, in addition to also using the sub crossover. For starters 40hz is way to low, at least bump that up to 60-80hz. If your AVR/amp is managing the crossover, you don't want your sub crossover in the picture, you need to place it on bypass.


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