Why we (often) upgrade the wrong things (first) and ignore the important things

I'm certainly sympathetic to identifying core bottlenecks as the primary concern and then working with the lesser constraints as part of a process of refinement.

However the question is which core bottlenecks or macro parameters are deemed most vital to address. Acoustics and speaker placement are a major influence, but above the Schroeder frequency not all speakers require the same degree of acoustical measures depending on how they excite the reverberative nature of a listening space. What's most important here is acting according to what acoustically suits a given pair of speakers' dispersion characteristics, and not least also what an individual feels is the most natural acoustical environment to his or her ears; some don't find highly damped rooms natural sounding, others again are more or less allergic to more lively acoustics - again, depending on the speaker context and their dispersive nature. 

I'm puzzled as to why the youtuber only addresses "amplifier headroom," as if lack of headroom is mostly about adding power. More power only gets you so far, at least until it leads to thermal compression/modulation on the speaker side of things, and at a certain point the need for a surplus of power is indicative of a significant bottleneck elsewhere, namely (not factoring in very large listening spaces and heavily damped acoustics) speaker sensitivity and load difficulty. The former is about speaker design and size, and the latter is about the amp-to-driver interface and how this is made a lot worse with passive crossovers. 

Depending on the system context I would also add the importance of impedance matching between the source/preamp output and power amp input. In many setups finding the right (and often quite expensive) separate preamp is what makes it all come together and you realize what your setup is really capable of - made all the more obvious when above mentioned amp-to-driver interface bottleneck has been addressed. 

Interesting and essential topic - thanks for posting, @hilde45. 

@hilde45 

Why do you like qualitative vs. quantitative better? I have my reasons but I’d rather hear yours.

Qualitative data and quantitative data have precise meanings unlike subjective and objective which are vague and appear to have a derogatory edge to them. I think they are less likely to lead to the polarisation and squabbles that abound at present.

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Great points, @jayctoy  Worth adding though: the video actually offers the bottleneck approach at whatever level of simplicity you want — the core idea is just identify your single biggest limiting factor first. You don't have to follow every meticulous step.

And that's exactly what protects the joy — knowing what's *actually* holding your system back means you stop chasing gear that won't make a real difference.

One gentle pushback though: even strong listening skills can mislead in a complex system. Room interactions, source issues, and component colorations mask each other in ways experienced ears often misread. Listening skill is necessary but not always sufficient for diagnosis.

That said, I agree: Match the tool to the task and enjoy both.

@kerrybh 

I think we're closer than we are far apart, but I'd resist the idea that we're just saying the same thing differently. There's a real difference between our positions that's worth preserving.

You say we "like what we like" and then backfit reasons in audiophile jargon. That may capture an initial reaction — and sure, sometimes we do rationalize after the fact. But the more interesting thing is that we can learn that what we liked was superficial and worth revising. I liked bright speakers when I started out. They sounded exciting and detailed. But over time I learned they were fatiguing, and that I was missing midrange tonality — something I came to understand matters more. My initial impression wasn't wrong exactly, but it was uninformed. The fact that perception and the feelings attached to it can be *improved* through experience and attention — that's "objectivity" if you want to use that word -- at work in taste. Not objectivity in the sense of measurements, but in the sense that some judgments are better educated than others. And that we're not stuck with "what we like." 

On the butter pecan point — let me shift the analogy a little. Some people love Coca-Cola. They'll say "I like what I like" and leave it there. But maybe they've never tried another cola. If you ask them *what about Coke* they like — the sweetness, the bite, the specific balance of flavors — and they actually start to break it down, you might help them find something that gives them all of that and more. The preference isn't locked down once you open it up to examination. "I like what I like" is only a dead end if you refuse to look inside it.

And in both these cases -- the speaker, the coke -- if they decide to stick with what they liked initially, it becomes a confirmed choice, not one that is just dumbly declared.

I completely agree about the toxic patterns you describe — the "something's wrong with your ears" crowd, the price-shaming in both directions. Those are real and they do poison discussion. But I'd argue they're caused by people who *can't articulate their reasons* and so experience disagreement as a threat. The cure for that isn't retreating to "it's all subjective." It's getting better at the reasons.

@newton_john 

I like the instinct here — "qualitative" and "quantitative" are more precise terms and carry less baggage. But I'm not sure the substitution is as clean as it looks.

Quantitative data in audio seems straightforward — frequency response, distortion measurements, impedance curves. But which measurements matter, how much they matter, and how they interact is itself a qualitative judgment. Two speakers can measure almost identically and sound noticeably different, or measure quite differently and both sound excellent in different ways. The numbers don't interpret themselves. Someone still has to decide that, say, a smooth off-axis response matters more than ruler-flat on-axis measurement — and that's a qualitative call informed by experience and priorities.

Going the other direction, qualitative evaluation in audio isn't just the fuzzy impressionistic stuff that "subjective" implies. A skilled listener describing midrange texture, staging depth, or the way a system handles dynamic contrasts is doing something structured and communicable. And it's not arbitrary — for the same reason quantitative metrics aren't arbitrary. In both cases, a community of practitioners can converge on rules and limits of usage. 

Quantitative work depends on agreed-upon measurement standards, calibration protocols, and criteria for significance. 

Qualitative criticism works the same way: experienced listeners can and do develop shared vocabularies with agreed-upon reference points, scope conditions, and norms for what counts as a well-supported observation versus a loose impression. The discipline comes from the communal standards, not from whether the data is numerical.

So the complexity doesn't go away with the new terms — it just shifts. The real question was never "measurements vs. feelings." It was always about how quantitative evidence and qualitative judgment inform each other, and what makes some qualitative judgments more trustworthy than others. Better vocabulary helps, but the hard interpretive work remains.

+1 to oddiofyl—I just upgraded to a new preamp, a Rogue Audio RP-9 v2, and I am astounded by the improvement in sound quality … on a scale I did not think possible.  Same speakers—Fyne Audio, same amps—Odyssey, same streamer—Innuos, same respectable but modestly-priced cables—DH Labs, silversmith Fidelium, IceAge Sudio.  And the people at Rogue with whom I talked tell me the preamp will improve after about 100 hours.  The speakers, in my view, are the most determining factor, but the preamp is also high on the list of key elements of a fine sounding system.