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· Super Moderator
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I was considering adding a BFD to help with a large peak around 47Hz but if I leave the settings so it outputs LFE to the mains it kind of defeats the purpose of getting the BFD.
Don't think I've seen a Yamaha that only had the sub working as LFE. Regardless, it should be easy enough to simply unplug the speakers. That's what I do.

As a side note, can low freq modes (47Hz) be tamed realistically without using an EQ? Sounds like the acoustic treatments would have to be extremely large to deal with these low freqs.
You're right, treatments (bass traps) capable of dealing with a peak that low would have to be large and numerous. EQ is your best bet.

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