Next minimal upgrade steppe for SQ

Accessories and Tweaks
1

Here is my set Up what would be the minimal next step up for Sound Quality.

WD usb2 2TB external HD Only Music aiff’s on it + Time Machine BackUp

MacBook Pro 2013 8GB RAM 256 internal Flash drive usb3

AudirvanaPlus Always very latest Version

Regen

ifi DAC nano latest driver iFiHDUSBAudio_dfuapp5.1A.sh

Oyaide neo d+ Class A USB 2.0 to MacBook

MusicLink Transparent Interface cables

Parasound 2100 Classic Preamp

Reference B&K 200.2 S2 Power amp 225W RMS

Paradigm 100 S series speakers

Klipsch Reference R-10SW Sub

Thanks

2

What is your budget?

If the above is your whole system, no other sources, I would replace the preamp and dac with a Directstream Jr. It would replace both of those components.

Or if you are mostly happy with the sound, start working on cleaning up your power, a regenerater or power conditioner, it all depends on budget.