I guess I do not get it. How could a speaker that is over $1000 a pair have inadequate bass? I guess with my public teacher income and my wife's retirement income $1400 seems like a lot to spend on speakers. To each his/her own. Peace and goodwill.
Imagine a $500 bookshelf speaker that sounds decent. Now, more money can get you basically the same quality of sound, but with deeper bass, or you can instead choose to improve the quality of the sound, without getting deeper bass. Getting both costs even more money.
I have some pretty nice bookshelf speakers that retailed for $1499. The bass -3dB point is 50 Hz. That may or may not be judged "adequate," depending on one's preferences. But they sound really, really good for the frequencies they do cover.
Here is another example to consider; imagine you are looking at:
RTiA3 - Bookshelf | Polk Audio®
You decide you have more money, and want to look at their better speakers. You could go with:
RTiA9 - Floorstanding | Polk Audio®
They are "voice matched" to the first pair, so basically what you get for your money is deeper bass, and possibly the ability to play louder overall. But the treble and midrange will sound nearly identical to the cheaper set (otherwise, they would not be "voice matched"). Or for the same (retail) price, you could instead go with:
LSiM703 - Bookshelf | Polk Audio®
With this choice, you get the same -3dB point in the bass as with the first, cheapest speakers, but you improve the quality of sound, going with a higher line of speaker. Suppose you have the price for either of these more expensive speakers. Which way do you want to spend your money?
The same idea applies to many different brands; you can either go with improving the bass, or the overall quality of sound.
And for still more money, you can do both:
LSiM707 - Floorstanding | Polk Audio®
At most price points, you are making compromises on what aspect of performance will be improved. And so what one should get depends on what compromises one is willing to live with, and what compromises one will find too annoying.