Where is the weakest link?

Here’is my opinion…
If you would upgrade one connection only it would be between preamp and amp. There is a huge difference between monster RCA interconnects and a good pair like Acoustic Zen Matrix Ref 2. I can vouch for that, I tested this in my system. You can hear it. Doesn’t have to be AZ you can try different cables. Next in line would be a DAC to Preamp interconnects followed by a power cord upgrade on DAC, preamp and amp. Polish all that off by a speaker cable upgrade.  

audphile1

Fascinating, you lean to doing interconnects as more important vs amp to speaker cable, which i thought would be the most important.

Of course if you buy that story then you have to wonder why not use an integrated amp and eliminate that weak link altogether. Hmmmm..... seem to have located a weak link in that one....

I think speaker cables can have the most influence on the sound of the system. Speakers are a very complex load with impedance that varies considerably over the frequency range. A quality speaker cable that is a good match with your system can make a significant impact on how it sounds. 

My sense is that interconnects need to be of quality but their role is greatly exaggerated.  Speaker cables are of more value.
The area between the router and the stereo preamp or the processor is a crazy mess of technological creativity; the good, the less than clear and insanely overpriced gear.  Connectivity issues are complex and frankly are a challenge to communicate and most seem to have a limited understanding.   Also the energy supply path between the wall outlet and the back panels of all the various components is also complex.

and we all attempt a best effort to address connecting the pathways from the wall and the router, and spend thousands to feel good about it.  Benefits at times are not really discernable. If i dont hear it maybe someone else will.  
I have seen so many pictures of systems and related equip lists.  So much variety.  So many brand names.  It can be fascinating as i begin to understand how all the pieces are fitting together.  I dont want to create an overly complex system.  So i try to be very prudent.  And have no idea when the buying will stop. It seems to go on and on and on. 
My not being married provides more freedom with my choices. Yeah.