I do not use any crossover to limit the main speakers. Instead, I play them out as far as they will go (Avantgarde Duos- older) and match the integrated woofers to the midrange for coherence. That means the speaker is bass-shy. I did a couple things when I moved from NYC area to Texas: I installed a pair of 15" sealed subs, tuned to match the integrated woofers in the Avantgarde (easy, given phase, gain and crossover frequency and slope)-- and not crazy expensive- Rthymik -: I also added DSP, on the cheap (DSpeaker 803_ II or whatever), It kills the peaks.
And it is improved by a change in cartridges- alas, that wasn’t cheap. Koetsu stone mo’fos. They have some seriously tonal, dimensional bass. I was using Airtights before, and LYras before that. As they say, -----