Doing what they do so well, may be the case. Also, I typically have some sort of vintage home speaker hooked up that doesn't go too low either, so I'm used to it. Probably the best bass reproducers I've had were a pair of JBL L110A, but they needed to be re-foamed, plus other flaws so I parted them out.
Currently, I've got Jensen Triettes (TR-10U), that are quite bass shy.
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