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
@phil0618

"What was striking about Elizabeth’s original post was that she invested big money in equipment she knew/thought to be quite good and yet she was dissatisfied with the system at the outset. That’s discouraging and luckily she got it sorted in a way that made her happy. But how was she to know what the ultimate solution was? The other interesting thing is that she seemed to base her decision at least in part on the recommendation of audio reviewers which we’ve all been cautioned about, but is still often a factor in buying decisions."

Agreed. But I think (cautiously) I might propose, for such intents and purposes, to take that reasoning a step further and say that, in the end, system building is for each of us our own act of creation...nothing more and nothing less, really...and that, whether we are fully aware of the fact from the outset or not, indeed None of us may know what the real destination will be when we start. We may Think we know, we may feel we have reason to be highly confident based on our own thinking, efforts and understanding...yet all of That is really nothing more than our best-informed supposition. But, what if, after our best efforts, we are left dissatisfied with something? What do we do then?

We can either stand down our urge to do something about it and say that this is just the nature of the beast, or we can dare to pull at the loose thread in the sweater...and risk unraveling the whole.

Given enough time to reach the decision, I’d say that many people may find themselves contemplating that there’s more work to be done than what they originally may have supposed. Although this prospect may not be for the feint of heart, it does also open the door ultimately to getting what one wants from the system...we just may not reliably know where it all will lead or how much (or even how little) it may finally cost, but, for those who have the heart for it, it is perhaps the only next, logical step. But, for each of us getting to that point, it may seem that a personal threshold must be crossed.

Cheers.
I’ve upgrade every component several times now, in headphones and speaker systems. The last round was a "whole system" upgrade in a few phases, so I got good information as I plugged new pieces in. DACs just sound more alike, over a broad range of prices, than any other component - even cables! I recently "downgraded" to an extremely smartly designed older DAC that cost me only $600 used (Wolfson WM 8471 chip, discrete buffer and CineMag output transformers), and I preferred it to my Schiit Yggdrasil (now sold). With all the hype on R2R DACs, the delta-sigma based DAC is more analog sounding, probably due to the output transformers (I’ve never been let down by a quality transformer in place of an active stage). Though I have found that if you want to get good sound from almost any DAC, a quality transport is a strict prerequisite, no matter how they hype their re-clocking, USB implementation, etc. Vinyl is by far my priority, so I haven’t gone down the road of super high-end digital transports.

Phono stages on the other hand - that is possibly THE most important piece in a quality vinyl-sourced rig. It's up there with the transducers on either end. It's the polar opposite of DACs. My experience was similar; phono stage was the LAST upgrade I did, I went in big with a VAC Renaissance SE, and all prior upgrades came pouring through the speakers as soon as it dropped in. Now the sound is so amazing that all the money I dropped doesn’t matter anymore.
@ivan_nosnibor   Great post. I enjoyed reading it. Thank you.

....in the end, system building is for each of us our own act of creation...nothing more and nothing less, really...

For me it is art, perhaps even an art form.
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I've read here that some believe speakers are the weakest link.  

I had a nice complete setup that was well matched and made that decision.  I decided to upgrade the speakers to a higher quality tier for a variety of reasons and knew what I was going to buy.  As soon as I put them in with everything else the magic wasn't there.  I sadly knew that the rest of the system couldn't keep up and exploit the quality of the speakers that I knew was there.  I believe all the pieces need to be in a somewhat similar quality tier or they are either the weak link or wasted money that goes unexploited.

Elizabeth didn't want this thread to morph into a sequence of upgrades discussion but if you change your speakers you very likely need to address the amp next unless the amp was already good enough for the next tier speaker jump and it mates well on technical terms.

If you are confident that the speaker/amp combo is solid, I recommend using listening friends to hear your system and provide what they think is the weak link.  They hear without owner bias.  After I got my speaker/amp combo right I didn't even know I had a weak link, but I was still seeking that magic I knew the speakers could provide.  Both local and online friends urged me to replace my preamp.  They were right, that was the weakest  link at that point.  After I fixed that it was obvious a turntable upgrade could finally be exploited and not held back as the last step.

Others have said finding the weak link allows all the other pieces to shine.  I agree that is possible, but it may also allow the next weak link to be more obvious.  Use your friends who listen with you to help.