Finding the 'weakest link' when upgrading?


Being able to find the weakest link when upgrading is really, really important.
Otherwise a different new component may never really be able to show how it is better. Since the other ’weak’ component(s) is(are) masking the new components better sound.

This is a difficult problem.

My best example is not exactly about the least sound quality, but it may show something about it.
I upgraded a good portion of my equipment all at once when I retired. And I still had in my system an old DAC I bought used. When I received most of the new components (including new preamp, new amp, new speakers and a new turntable and cartridge), I was comparing my old DAC with the new one. And found no sonic difference. I mean I tried every way I could and could not hear any difference between them/ So either I just wasted $25,000 for nothing or?? I was very frustrated.
Anyway, after three weeks I got another new bit which had to be ordered and built
.
When I plugged in the phono box, an epiphany and a flood ot tears.. My $25,000 of new equipment really was better. Since the phono box sounded glorious, thus it made it clear all the rest of the system WAS NOT holding back the new DAC. That new DAC was actually just not any better than my old one. And I returned it.

And unless I just happened to acquire that new phono box a week later, I would have been stumped why the new DAC (which was praised to the skies by both Stereophile and TAS) was not doing better.
I was seriously bummed and confused about wasting a ton of money... until I played the new phono box.

Now it was kind of odd that the two DACs, one, used for $250 )it’ original list price was $1,000) and the other $2,400 and 12 years newer) could sound so alike. But chance happened. (And toss in the official guru magazine praise with it all)
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Anyway, how do we find the right part to upgrade? Since making the wrong choice can leave one in the same boat I was in back in my example? (at least until I got the phono box)

I do not have an answer. and I ask.. does anyone?
For me it is just kind of a sixth sense, with little real science to it.

In general I have been kind of lucky.
But how do I know I have managed well?

I do not know.
It has been better more often than not.
(Though I have made a few really terrible choices over many years now and then. Costly choices)

Anyway, my question is how do you make the choice of what to upgrade?
How do you know or decide which is you weakest component?

And do you agree finding the weakest component is really important in the path of upgrading, or one might be making expensive mistakes buying gear, or trying gear? (which may really be great, yet you cannot hear it due to some other weak links in the chain? And though I hate to say so, this weak link may even be cables, or powercords or even the AC from the wall*.

*(but please do not get into a big theory arguments about interconnects and powercords and power conditioners.) Stick to the main topic of knowing how to find the weakest link.
elizabeth
elizabeth I would say unless you have what would seem to be an obvious mismatch it can frankly be impossible to tell. In fact if the system is sounding good and you're really enjoying it, perhaps there is no "weak link" per se? The potential for improvement is surely almost always there but at what cost? Monetarily and aggravation and timewise. The good news is you obviously listen to your ears, to me that's the most important step.
"" it can frankly be impossible to tell""
I think there are ways to figure it out, just trying to find what folks think are the ways?

In fact I also think it is a great challenge to find the weakest link.
Part of it is knowing what one really wants to have 'more of'..or 'less of'.
Like less grain. or more clarity, greater dynamics, less treble harshness... greater warmth, less wooly bass ... etc.

I can see where if folks are unsure what they really want.. it would be impossible.


Want the biggest and best change for your system? Sure you do! BUY A BETTER PAIR OF SPEAKERS! They are the weak link and worst measuring of all components! Many speakers cannot even play back a simple pulse - yet are beloved and touted by the "golden ear" crowd! The ancient Quad ESL passes the impulse test with ease and sounds better than 99% of present day speakers! 
I believe I'm with you elizabeth, it can be figured out, but I confess I have no simplified or reliable method per se for doing so. For me although it does come down to experimenting with substitutions (or additions....or even subtractions of whatever gear, wiring or tweaks I can think to try, really), experience and just my best instinct are what I find I fall back on most. That's mostly trying to examine, as best I can, the actual nature of the type of audible noise or distortion I'm looking to remedy to see if that gives me the best suggestion of its possible cause and what component(s) may be involved.

For example, I already have some impression, by way of prior experience now, that there may be differences in sound between things like inferior connectors (whose constricted sound may be telling me it's time to either bypass or upgrade them), the overall whiteness or grayness of digital hash or noise or, say, sibilance issues that may be caused by a cart that is not quite properly aligned. Of course, the problem is that virtually any of these sounds may each well have more than one, possible, technical cause...or in fact many causes at the same time...and sometimes we can replace a component that fixes the problem without us ever being able to reach a reliable conclusion as to what it was about the component that was causing the problem.

But, listening to the nature of the sound of the problem is about my best bet toward identifying the source of the problem and I'm always aware that my first attempt may fail to impact the problem like I'd hoped, but that the process of elimination is still key. In the end however, I accept that eventually unearthing the real problem and finding a true solution for it is a certainty as an outcome and, in the face of the initial uncertainty, it just may demand both patience and persistence...but it all seems to go with the territory.

 Synergy is one of the most important factors. And replacing one piece at a time is one of the best way to tell differences. You never trully know how a piece will sound untill you hear it in your system. I usually have a long term plan and know what pieces I am not completely happy with. I work toward the end goal. 

 But at this point I am trully happy with my system. There is nothing that I really feel needs upgrading. My phono preamp was the last piece.