Reverend Slim
Member
I don't think you're quite right here. If you leave MRC enabled, irrespective of whether your speaker exhibits that dip or not, Audyssey uses its filters to craft its MRC dip centered around 2kHz in the target curve. It doesn't do any detection or analysis of whether your speaker already has that dip, so it couldn't possibly ignore it if it does. But if the measured response has that dip already at that particular frequency, naturally it wouldn't need to use any filters to achieve it (or at least minimal filtering in that region to match the target). My ear-level speakers don't exhibit that dip in my room (though their crossover is at 2.5kHz, so any dip they had wouldn't match Audyssey's MRC anyway), but if I load two profiles to my AVR with MultEQ X - one with MRC and one without - there's an obvious difference. If what you're saying is true, there wouldn't be.According to Audyssey/D+M (in the recent YT video), the dip shown really isn't the target as such (strictly speaking, as it actually depends..). Whether you will end up with that dip or not will depend on your speakers. It the speakers are not designed to have that dip then you will not have it even if you leave it enabled. If the speaker is designed with the dip then it will have the dip unless you disable it, in that case Audyssey would try to flatten the dip. In the video, the Denon rep suggested to leave it enabled so as not to change the speaker's design, and disabled only if you tried, and don't prefer the sound with the dip.
My height channels, however, do exhibit a dip at 2.5kHz due to them being more off-axis than I'd like. If I enable MRC for those channels, Audyssey still uses its filters to craft a dip at 2kHz. The existing measured dip that's at 2.5kHz gets flattened out (or at least attempts to). Audyssey has said that you can disable MRC and manually create your own version of the filter at the crossover region of your particular speaker... but there's no fast way to do it. They have suggested that a future update for MultEQ X may allow you to enter in your own center frequency for their MRC, which would let you better tailor it to your individual speakers. Of course, that is with MultEQ X. With the app, you can't create your own matching filter - just disable/enable MRC in the target curve.
Short version: If you see a dip in measured response around 2kHz, leave MRC on for that speaker so it doesn't try to fight it with filters. If you don't, try MRC on and off to see which you prefer.