If you can swing an extra $500, try a pair of Neumann KH310A monitors. They are small, they go low, and yes, I have a pair. You won't be disappointed.
https://www.soundonsound.com/reviews/neumann-kh310a
Please suggest bookshelf with best bass response under $4000 pr.
Lately, I've been craving deeper, tighter bass. I'd like to hear some ideas for replacing my Silverline 17.5 monitors. Is this a stupid question, due to inherent limitations of driver size imposed by typical bookshelf dimensions, or might I actually do better with another speaker? Amplification is Wells Audio 150 watt SS Majestic integrated. Source is aging Jolida JD100 tubed cdp (in new year, I plan to replace this with another SS cdp or a transport/standalone dac combo). Thanks !