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Buckeye Purifi Eigentakt 1ET9040BA monoblock power amplifier Stereophile Measurements

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A word:

We can be a tough crowd. Many, many highly talented Engineers and Professionals live here. We can ask the difficult and challenging questions. At the same time. We want to attract Product Development Engineers from the industry. We want them to become part of our community and enjoy conversing with their fellow Nerds and Geeks. When they come here and join the Family and dip their toe in the pool. We must guard ourselves from trying to bite their foot off at the ankle. We have chased a few Industry Technical Representatives out of participating.

This isn’t a crime scene and from what we understand so far. It was a minor QC kerfuffle and they are working to rectify. They are not burying their heads in the sand and pretending like nothing happened. They took responsibility as soon as the failure was identified. We have to strike a balance between being combative and being welcoming. Whilst extracting as much information as we can without offending or becoming burdensome. Do the dance. Be cordial and kind and while you are trying to wrench whatever it is that is a “National Emergency level event” in your mind. Remember, they are our Guests and they are participating members until they don’t want to play “Answer a Million Questions at light Speed” game anymore.

You can use Honey or Sh_t, but certainly you should know what one will be more productive. Give as much as you take. Think about how it must feel to be on the receiving end and trying to answer question after question with no end in sight. Let’s make a concerted effort to retain Technical Expertise and Manufacturing Reps. They are a valuable resource we should not squander so easily Gentleman. :cool:
 
But as you can see, this is no longer enough. Questions are now arising on a wide variety of channels. This can only be countered with transparency and a clean methodology. That's why I mentioned the 8D report, which highlights all the weak points in the chain and aims to prevent any recurrence. As long as an RCA has not been carried out, it cannot be ruled out that other products from the past may also be affected.
If this is not done properly, I can see major damage coming to some brands. Manufacturers who build the Purifi design under license will be less affected by this.
I hope those involved are aware of the consequences.
Have you ever worked in high tech over seas manufacturing?
 
Have you ever worked in high tech over seas manufacturing?
I have.

Those sorts of reports are carried out all the time. They belong to the manufacturer. In my experience they are never published. They are certainly never published raw - f you've ever seen one published, it will have been highly sanitised.
 
Anything is possible. However, I will not consider a Purifi 9040 purchase until the defective serial numbers are publicly released. I don't see anything wrong with customers wanting full disclosure. We can do it politely.

When Denon changed the DAC chipset in the Denon 4700 after the ASR review, customer pressure finally required them to release which AVR serial numbers were impacted. In my view, companies should be upfront when issues occur. Full disclosure is always helpful. Nothing improves a relationship more than openness.

By saying "anything is possible," you strongly imply that Purifi's reputation not taking a hit here would be very unlikely. Once gain I would say I don't find that convincing.
 
And lets not forget.

The mark of a good company is not one where nothing ever goes wrong. It is one that responds correctly whin things DO go south.

In this case, Purify have acknowledged the problem - contained it - determined root cause - fixed it - supported the customers - learnt from it (we can assume) and moved on with a more robust organisation.

Oh, look - most of those 8D steps, right there.
 
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It's also a bad reflection on Purifi when they have manufacturers who openly try to dissuade prospective customers from being fully informed.

This is a demonstrably false claim.

@Buckeye Amps has openly told existing customers precisely how they can get the full information if they want it - contact Purifi or Dylan himself. (The information, though, will be, "no, your amp is not affected," for the reason that's been explained multiple times already.)

As for prospective customers, by definition they couldn't buy an amp with a problematic module in it even if they wanted to, again because those modules are not (or are no longer) out in the wild.

And speaking of not being fully up-front and transparent, let's be clear about what your actual position is: you want Purifi to publish the serial number of every affected module so you can buy a 9040-based amp, open it up, find the serial number of each module in your new amp, and input it into a Purifi database. Because you don't trust Purifi to be telling the truth when they say all the defective modules are accounted for and not in the wild - but you do trust them to compile a complete database of the relevant serial numbers.

That's a nonsense position. It makes no sense.
 
1735507437295.jpeg
 
This is a demonstrably false claim.
Since you wish to continue the conversation even after moderator asked for a pause I am happy to oblige you.
The only measurably false claim I am aware of was the 51K input sensitivity posted on the Buckeye site for the 9040 that has now been removed. In fact, Buckeye removed it from all product on the site. I can't imagine doing that if the company was confident in posted specifications? There is no reason for a product manufacturer not to disclose the serial number of defective parts if they know them. In any other industry that would be normal practice. In addition, it's hard to believe that the only 9040 module in the wild is the one Buckeye sent to Stereophile. It will take time and more 9040 measurements to verify.
And speaking of not being fully up-front and transparent, let's be clear about what your actual position is: you want Purifi to publish the serial number of every affected module so you can buy a 9040-based amp, open it up, find the serial number of each module in your new amp, and input it into a Purifi database. Because you don't trust Purifi to be telling the truth when they say all the defective modules are accounted for and not in the wild - but you do trust them to compile a complete database of the relevant serial numbers.

That's a nonsense position. It makes no sense.

I have no conflict of interest. I own Buckeye, Boxem and March amps. Having worked in manufacturing I know it's hard to claim one out of 99 defective modules were out in the wild and all returned except the one in the Stereophile review. It might be true but it's probably not. The serial number is shown right on top of the Purifi module. It's not a trade secret. It's not hard to see. Buckeye encouraged me to open his amps in the past and even change out parts leading to the binding posts. It's not rocket science to open a case. I'm not sure what's wrong with verification if the owner is interested. Or why it's even a controversial issue?
 
I'm not sure what's wrong with verification if the owner is interested. Or why it's even a controversial issue?
No one is saying they can't verify. Customers already have with me. You are just upset at the method of verification.
 
No one is saying they can't verify. Customers already have with me. You are just upset at the method of verification.
Exactly. You've been saying that for what? 10 pages now? Why is this so controversial? You have WAY MORE PATIENCE than I my friend. Hats off to you for being professional, respectful (unlike many here that are making accusations without evidence), and responsive. I think I may now be a future customer over all this.
 
Is it possible that emissions into the ribbon cable can lead to problems, especially at higher output levels?:

View attachment 415642

Would the measurement results generally be different if a different cable routing were used?
This could be a quick counter-test.
Is the cable routing retained during the retest?
 
Is the cable routing retained during the retest?
Same routing but what's not shown from that perspective is the distance between the ribbon and speaker cables. They are not right on top of each other (there is a few inches of vertical distance)
 
A word:

We can be a tough crowd. Many, many highly talented Engineers and Professionals live here. We can ask the difficult and challenging questions. At the same time. We want to attract Product Development Engineers from the industry. We want them to become part of our community and enjoy conversing with their fellow Nerds and Geeks. When they come here and join the Family and dip their toe in the pool. We must guard ourselves from trying to bite their foot off at the ankle. We have chased a few Industry Technical Representatives out of participating.

This isn’t a crime scene and from what we understand so far. It was a minor QC kerfuffle and they are working to rectify. They are not burying their heads in the sand and pretending like nothing happened. They took responsibility as soon as the failure was identified. We have to strike a balance between being combative and being welcoming. Whilst extracting as much information as we can without offending or becoming burdensome. Do the dance. Be cordial and kind and while you are trying to wrench whatever it is that is a “National Emergency level event” in your mind. Remember, they are our Guests and they are participating members until they don’t want to play “Answer a Million Questions at light Speed” game anymore.

You can use Honey or Sh_t, but certainly you should know what one will be more productive. Give as much as you take. Think about how it must feel to be on the receiving end and trying to answer question after question with no end in sight. Let’s make a concerted effort to retain Technical Expertise and Manufacturing Reps. They are a valuable resource we should not squander so easily Gentleman. :cool:
Honey didn't work for me for a Purifi PSU,that's all I'm interested in :p

Happy New Year to All!

(and leave this mess away,it leads nowhere nice)
 
I don't believe you. Gonna need you to hire a QC guy and tell him to tell me that you hand assemble these... Thanks...

Better still, get the QC guy to publish his report in full on ASR.
 
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