You know it is blasphemy to say, but I have a couple of SVS subs, one next to each speaker, and I have once before written that for some reason I have not had the problems others have making them sound right to my ears.
Not blasphemy to me, but not the path I’d recommend everyone try first.
The problems that you run into getting very deep bass is that too much is up to chance and circumstance. Open floor plans, good speaker/listener position, and otherwise naturally good acoustics contribute.
I will say though that I’ve heard many subs be configured so they are inoffensive, without being fantastic. I fell into this trap myself for a while I was satisfied with what I had and thought it was the best I could do without brand shuffling.
Which one are you? I don’t know. You could have gotten super lucky, you might have settled. Lets be grateful for these lucky situations when they happen.