Best Stereo Upgrade Value

Anyway, you choose the best source and speakers you can and then fill in everything in the middle. Tuning the room is additional direction. But not all of us can convert the room into a concert hall. Unfortunately. 

" weakest link " is a great general answer.

In my case, I would say adding PS Audio power regenerator was the single biggest improvement. Before it I was using inexpensive Furman power conditioner.

Next, going from Redgum integrated to Burson separates linked by Wywires Diamond cables.

And third - putting old Purist Audio Dominus power cord on the power amp.