Two changes to my system this year that eclipsed many changes I had made in the past. These two items were purchased sight unseen, and not auditioned prior to purchase.
The first update was to my DAC I purchased the Denafrips Venus II DAC unheard. This is an amazing DAC that catapulted my system sonic's into otherworldly levels of sublime. I remain flabbergasted. The impact to tonality, timbre, dynamics channel separation, wow. While I wonder how the Terminator II would have sounded, it's hard to imagine how much better it could have sounded.The Venus II DAC just put's more "there there" ... .
The next upgrade item was to my Line level Preamp. My Sonic Frontiers SFL-1 was shelved in favor of the new PrimaLuna Evo 400 Line stage Preamp. The Evo is performing so well. Dead quiet, blacker blacks, more bandwidth, and better channel separation, musicality. The build quality is matched only by my Dialogue 7 mono-blocks. Synergy is a real thing,
Two admittedly big changes and I am enjoying music reproduction that is leaps and bounds of sonic improvement over the other. My system is now advanced into the modern era. I am very happy.