Originally Posted By 975 destroyer
Be VERY cautious boosting your sub below ~25hz. Applying a wideband, modest cut in the middle of that bump is much safer


Good to reinforce that you shouldn't boost the output of a low frequency range because the amplifier can't overcome the suck out caused by the room. Or for that matter below the sub's frequency range. From my research it may be possible to make a modest reduction in a low frequency dip but it isn't likely to remove the majority of the dip.
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AvFan
Outlaw 976 | ATI 2005 | M&K 850s Left, Center & Right, Surround-55s, MX-70B Sub | Harmony 950 remote | Panamax 5100 | OPPO UDP-203 | LG OLED55B7