Buckeye Amps: Purifi 1ET6525SA (the successor to the 1ET400A)

[Oniiz86]

Heads up that we will finally be sending a Purifi 7040SA v2 to Amir for an official review.

@Buckeye Amps I know this was quite some time ago but I was just wondering if you actually sent your 1ET7040SA v2 amp with Micro Audio's SMPS1K-PFCR2 to Amir for review?

Also I know it's very much a moot point now that you've discontinued your 1ET7040SA amp but did you ever end up offering a 2 Ch variant of the 1ET7040SA, you had briefly mentioned that it would arrive at some point?

You had mentioned the following in your Buckeye Hypex NCx500 official thread,

Another added bonus is this new SMPS will also be used to eventually offer a 2ch Purifi 1ET7040SA model, capable of full power just like the monoblock version.
The 2kW Micro Audio we are using for the 3ch NCx (and eventual 2ch Purifi 7040SA) will be exclusive to Buckeye Amps for the next 3yrs.

 

[blackiridium]

@Buckeye Amps You had mentioned a mid October launch of the 1ET6525SA?
Thanks

 

[Buckeye Amps]

@Buckeye Amps I know this was quite some time ago but I was just wondering if you actually sent your 1ET7040SA v2 amp with Micro Audio's SMPS1K-PFCR2 to Amir for review?

Also I know it's very much a moot point now that you've discontinued your 1ET7040SA amp but did you ever end up offering a 2 Ch variant of the 1ET7040SA, you had briefly mentioned that it would arrive at some point?

You had mentioned the following in your Buckeye Hypex NCx500 official thread,

Most likely not planning on a 2ch 7040 anymore, no.

 

[Buckeye Amps]

@Buckeye Amps You had mentioned a mid October launch of the 1ET6525SA?
Thanks

Purifi finally gave an ETA date of Nov. 9th

 

[Oniiz86]

Most likely not planning on a 2ch 7040 anymore, no.

Of course, totally understand but did you ever send your 1ET7040SA v2 amp to Amir for review, would have been great to see the measurements?

 

[Buckeye Amps]

Of course, totally understand but did you ever send your 1ET7040SA v2 amp to Amir for review, would have been great to see the measurements?

Actually no, it just never came up/a customer never requested their unit to be sent in.

Edit: I take that back, we did send one in around this time last year but Amir had a very long backlog so by the time he finally got to it we had just added the capacitor PCB add-on option and rather then wait even longer for their build to be updated and get back in the review queue, the customer canceled it.

 

[Mike_Trueman]

Hello,

Can you hear a difference between the Purifi 1ET6525SA and the Hypex NCx500 amplifier? If no why sell 3 modules?
What is the biggest difference explained in normal language between the modules?

Thanks.

 

[Buckeye Amps]

Hello,

Can you hear a difference between the Purifi 1ET6525SA and the Hypex NCx500 amplifier? If no why sell 3 modules?
What is the biggest difference explained in normal language between the modules?

Thanks.

Between those two modules, no audible difference. We offer both so people can have choices that may come down to something as simple as wanting to stick with Hypex to pair with other Hypex multichannel amplifiers.

The only major "differences" to note (outside of measurement level differences like distortion and noise floor which are both at SOTA levels) is the extra wattage of the Hypex NCx500 but even then it isn't anything likely to be audible.

 

[amper42]

Between those two modules, no audible difference. We offer both so people can have choices that may come down to something as simple as wanting to stick with Hypex to pair with other Hypex multichannel amplifiers.

The only major "differences" to note (outside of measurement level differences like distortion and noise floor which are both at SOTA levels) is the extra wattage of the Hypex NCx500 but even then it isn't anything likely to be audible.

Also of note:
1. The NCx500 will run measurably warmer than the Purifi design.
2. The NCx500 will use approximately 60% more electricity at same background music levels as the Purifi amp design.

 

[Oniiz86]

@Buckeye Amps Now that Purifi have officially announced the 1ET6525SA on their website, I guess the preliminary specs were slightly incorrect regarding the power rating of 480W at 4 Ohms, it is now 450W which I see you've now adjusted, surely it's an inconsequential difference but was curious to note that the 4 Ohm spec was initially much greater than simply a doubling of output power from 230W8R to 480W4R although there is still a slight error on their website concerning 250W8R & their datasheet with the correct 230W8R rating.

 

[amper42]

@Buckeye Amps Now that Purifi have officially announced the 1ET6525SA on their website, I guess the preliminary specs were slightly incorrect regarding the power rating of 480W at 4 Ohms, it is now 450W which I see you've now adjusted, surely it's an inconsequential difference but was curious to note that the 4 Ohm spec was initially much greater than simply a doubling of output power from 230W8R to 480W4R although there is still a slight error on their website concerning 250W8R & their datasheet with the correct 230W8R rating.
View attachment 408414
View attachment 408415

A build with Hypex SMPS1200 and Purifi 1ET6525SA it's likely to measure close to 210/420/510 W in 8/4/2 Ω.
It's not something you notice with music playback, but it's good to know the PS model used will make a slight difference.
Some builders quote Purifi spec without actually measuring their specific implementation which can make spec comparison of various 1ET6525SA builds inaccurate.

 

[Buckeye Amps]

Good news! 1ET6525SA pre-orders are finally shipping. I am burning my way through the first module shipment Purifi sent me and hope to have the next shipment from Purifi early next week. Once those are received, should have all pre-orders shipped before/beginning of December at the latest.

 

[GPx86]

Curious to know if you can share. What is the quality control process from Purifi, and Buckeye? Is Purifi testing 100% of modules or batch testing? Is the testing manual or automated? Is Buckeye testing 100% of amps, or batch testing?

 

[Buckeye Amps]

Curious to know if you can share. What is the quality control process from Purifi, and Buckeye? Is Purifi testing 100% of modules or batch testing? Is the testing manual or automated? Is Buckeye testing 100% of amps, or batch testing?

Each module is QC marked/verified from Purifi (I have never inquired about their actual QC process, however). And then each amp is tested by us before shipping out.
Since offering Purifi, I can count on one hand how many modules (not amps, just single modules) have been faulty.

 

[keywork]

So i've got a pair of Sierra LX's (https://ascendacoustics.com/products/sierra-lx-pair?variant=40080757227574) and I have been waffling on pulling the trigger on one of these 1ET6525SA amps. Does anyone think the extra power @ 8ohms of the NCx500 would make a difference here? My gut says no but could use some confirmation bias ha. Thanks!

 

[jcarys]

Short answer - no. Long answer - theoretically it's possible. Ascend says it can handle 350 watts. I mean you could be trying to play these at ear bleed levels in a huge room - if so, you might as well have the extra watts. It's a 2 decibel difference at any realistic listening distance.

Max Continuous Power*	350 watts
Max Short Term Peak Power*	500 watts

 

[Neuropsychology]

What's the status on shipping currently? Curious new customer wants to know.

 

[Buckeye Amps]

About 14 days from order to shipping at the moment