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A 60Hz crossover would make this even more certain, but that would be a little low for your VP150 and QS8s(and you can set only a uniform crossover frequency on your 3803).



Good point John. While 50-60hz is optimal for the M80s it won't be for the other speakers. In fact for the QS8s I prefer higher than 80hz. With HT there are alot of compromises. If he is planning on investing in all those subs he may want to consider a receiver with better bass management, something that allows more control over crossover settings.

John