Good reminder. Why I had forgotten about AutoEQ - beats me. Maybe cos there is no AutoEQ squigs site... Cos when I think of Frequency response, my mind immediately goes to the various squigs.
Thanks.
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Hidizs MP145 IEM Review
- Thread starter amirm
- Start date
Thanks.
But the issue with manufacturer revisions, remains the same. After discovering that my IEMs had been revised, I could no longer use AutoEQ to create any correction cos I could not tell from AutoEQ, what measurement corresponds to my revised IEMs, making databases like AutoEQ, unusable for me in my scenario.
Thanks, definitely one of the reviewers who adds value to the conversation on IEM's and DACs. His opinion DACs though are somewhat subjective, so many Ibasso dongle DACs at the top of his DAC ranking !. Take his opinion for what it is.
herr.jemine
Active Member
seriously, that's just blabla in the video - one of them also seems to believe in cable sound - if the two of them say they were abducted by aliens, people would believe that too - I'm impressed
My suggestion is that one filters these opinions. Take the good that one understands and accepts, and leave the voodoo comments about cables, where they belong.
The video did have aspects that made sense, such as a difference in perceived frequency response, which aligns with the measured frequency response posted not long ago, on this thread.
I recall buying studio speakers in the early 2000's purely based on subjective opinions of a reviewer in Sound on Sound magazine. That was the state of the art, at that time, in reviews in a highly regarded magazine, but they also have moved much further towards objective speaker measurements, to support any subjective opinions. Once upon a time, this was the preserve of experts i.e being able to take speaker measurements.
But now more and more of us are able to achieve this, objectively by adding a calibrated measurement microphone (+ stand) costing about $100 or less. Cos there are some free/donationware like Room Equalisation Wizard, which has opened the door for such capabilities. This has been possible for at least 10 years and the availability of measurement microphones has improved. I recall having to import mine - to get one which had been calibrated at affordable cost, hopefully it's a lot easier now.
It would be wonderful if more of us, who have more than a passive interest in all manner of listening devices, could achieve a similar capability with IEMs, able to measure them, without having to invest more than about $100. I have not done much research into what is available, but that's on my wish list. Learning about the gear, where best to buy from, and the best techniques to measure, similar to the learning curve with measuring speakers.
And would I do that? If I filter what I want to believe, how does it make these opinions (your word) more objective?
I am in @herr.jemine camp here: these two gentlemen may be right in the end, but until they support their point with objective evidences (measurements…), it’s just opinions, respectable opinions, but no more than that.
What is the minimum evidence you would require for believing that the product did change?
Actual A/B measurements in relation to manufacturer tolerances… which BTW is exactly what this “Hidizs challenge” campaign is about.
I think Hidizs is taking the right approach here: some “influencers” says Hidizs has changed something… Hidizs’ answer is: “Prove it to me…”
I suspect they haven’t changed anything and the differences are typical manufacturing variability, blown out of proportion by the—also typical—audiophile “magnifier”, but that just my opinion, and I’ve been wrong before.
But regardless, if in the end there is proof of a change, unequivocally supported by measurements, Hidizs would have to explain it… which I would be very interested to learn about: what it is that they changed and how does it correlate to the FR differences.
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Silent revisions are made to feed more FOMO, when you fear that after a while from release the FR will change from the reviewed units, than you have to hurry up and buy asap after the release date 
That's very clever conditioning in that case.Silent revisions are made to feed more FOMO, when you fear that after a while from release the FR will change from the reviewed units, than you have to hurry up and buy asap after the release date
It wouldn't surprise me a bit...
After I became aware of the possibility that products may change, I would in future prefer to focus on either products from manufacturers who DO NOT have such questionable practices, or like you said, purchase about the same time as the reviews are published, to reduce the risk of me purchasing a silent revision.Silent revisions are made to feed more FOMO, when you fear that after a while from release the FR will change from the reviewed units, than you have to hurry up and buy asap after the release date
The 1st option - purchasing products from more ethical manufacturers, does not help manufacturers like KZ/CCA.
I must add though the IEM market has two pretty tempting segments, for those on a budget.
1. The real budget segment, sub $50 (more like the sub $25) dominated by products like the 7Hz Zero 2, Moondrop Chu 2, and the KZ/CCA budget category. Whatever the issues with KZ/CCA, their prices are impossible to ignore. Who does not want a $35 IEM that sounds as good as a $200 or $300 IEM?
2. The IEM's between $50 and $150, such as the Hidizs MP145. Who does not want a $150 IEM that sounds like $1000 of great kit?
It's a wonderful time to be alive, to hear stunning audio on an IEM, and IEM's in particular, where they seem to have had the most compelling progress, in the most recent 5 years., compared to any other category of listening devices.(i.e transducers)
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It’s definitely a questionable practice when an OEM knows about the consequences of a change, yet decides to go ahead without saying anything, abusing customer trust.
However, if this sector is no different from the rest of the industry, more often than none, it’s a lack of understanding of critical characteristics and loosy quality control that result in these unintentional “silent revisions”…
It's not very clear that this is normal or unproblematic unless you left out some context.
It’s definitely a problem! I was trying to point that when a “silent revision” has been uncovered (with unequivocal evidences!), the reasons behind can be multiple: it’s not necessarily a shady, deceiving, practice from the OEM…. The most likely cause (the “normal”) is bad QC, some change in the supply chain or manufacturing that was deemed “OK” by somebody not understanding the consequences.
Where has the silent revision of the MP145 been unequivocally proven? From what I’ve read the company has not confirmed and the FR graph posted above seems could be explained by measurement or unit variability. I got the MP145 a couple of weeks ago on the basis the FR roughly aligns to my preference without eq and I’m enjoying them a lot!
Are those tips included in the box or sold as a separate kit?
