Interesting. That’s a pretty good sized room for a little pb1k, even as good as it is. As far as telling how hard your working it, I guess you can pull the grill and watch the driver during certain scenes.
I think maybe since your wife has even noticed the difference, you might be able to make a case for trading it in for a pair of pb/pc 2000’s. The reason say that is because, as @danzilla pointed out, once you find true bass you will likely want even more, or even better bass. No I don’t mean that trunk rattling kind of crap you find in car audio lol. I mean real quality bass(like you’ve found now) with depth and power, and linearity. My gut says it’ll be less than a year before upgraditis starts to swallow you. This isn’t necessarily a bad thing either as long as you can accommodate it.(I mean reasonably of course)