I am not good at describing the sound of speakers, but I can relate what I hear.
I have a IB subwoofer system, 2 manifolds with 2 18" drivers in each. This sub is flat to 12Hz with very low distortion and prodigious output.
Woofers are Claude's Quarter Pies with Kappa 15C drivers. These are very articulate. I never knew how much clarity I was missing until I tried horn loaded bass.
Mid and high frequency is K-402 with AXI2050. I was using BMS 4592-ND drivers until I received the new ones (only 14 weeks on backorder). The BMS drivers were very clean and sounded wonderful. I figured if the Celestion drivers were not an improvement, I could flip them for not much loss. To my ears the AXI2050s are better with a glorious midrange and good highs. Not needing to crossover to a tweeter gives a seamless sound.
Once I had the PEQs and delays figured out, I started with Chris Askew's Xilica settings for the AXI2050, the sound is very well integrated and holographic. I attended Axpona this year and listened to dozens of stupid expensive systems. What I have in my house for maybe $10,000 easily beats most of the $50,000 to $100,000 systems.
The only thing I still want is the dispersing lens Roy designed to improve the polars at high frequency. These are patented, and I wouldn't want to step on toes, but it sure would be nice.