NAA with Asynchronous USB DAC

[MikeB33]

Hoping to get some advice and clarity!  I own a set of KEF LS50W active speakers.  They run 24/192 through Asynchrounous USB.  I'd like to take sound to the next level and am considering an NAA + linear power supply...specifically either Sonore Signature Rendu or SOtM 200Ultra.  With much of the success (and cost) of these devices attributed to the timing/clock corrections, can I expect improvements to an ASYNCHRONOUS USB utilizing its own clock?  My thought is that the DAC on the KEF is going to leave its fingerprints all over the timing from the Sonore or SOtM and make it a bad investment. Yes, I know NAA's do more than just timing in addressing jitter...paricularly with good linear power.  Are NAA's only going to improve timing for synchronous connections where the source is responsible for the clock?  Much appreciated!