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General speaker questions for audio and home theater.

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The elephant in the room...

Posted by Duke on November 3, 2020 at 16:01:14:
... IS the room.
Room interaction inevitably imposes a nasty peak-and-dip pattern on the output of any subwoofer. You can change the pattern by moving the sub and/or moving your listening position, but you cannot eliminate it by re-positioning alone.
EQ can smooth the response at the listening position, but at the same time it will almost always make the response worse elsewhere in the room (because elsewhere the EQ's boosts and cuts will no longer be aligned with the room-induced dips and peaks).
If the goal is smooth bass over a wide listening area, one approach which works well is to use multiple subwoofers asymmetrically distributed around the room. Each will have a different room-interaction peak-and-dip pattern, but the sum of these multiple dissimilar peak-and-dip patterns will be significantly smoother than any one alone. Obviously smaller subwoofers can be used because there are more of them.
Credit to Earl Geddes for this concept, which I use in one of my products with his permission.
Duke