Buckeye Amps: 2nd Generation Purifi EIGENTAKT 1ET9040BA Amplifier

[Salt]

This thread is about a single product:

Buckeye Amps: 2nd Generation Purifi EIGENTAKT 1ET9040BA Amplifier​

and needs some cleanup from unrelated stuff that fit better into some of the several other threads about such things here on ASR.

Please.

 

[JustJones]

@AdamG
Clean up aisle Buckeye Amps

 

[AdamG]

@AdamG
Clean up aisle Buckeye Amps

Done and a thread ban tossed it to keep the aisle neat and tidy. Please report any further off topic comments.

 

[Buckeye Amps]

Forgot to post:
The Micro Audio SMPS upgrade option is live on the website (selected during checkout).

 

[Full Zhou]

Actually, I have also done a simple test on 1ET9040BA, using the instruments DCA+E1DA APU+E1DA ADC. The THD+N is 0.000066% at 1K, but when the load is connected, the THD+N rises to 0.00030%. Of course, it has something to do with the ground of my power supply. Maybe my power supply is not well installed and not fully installed in the chassis, but later I accidentally touched the output line to the outer casing, and as a result, the power amplifier burned out, and there was no subsequent testing.

 

[Opal]

Mainly things like power (do you need or want more power that the 9040 offers in monoblock form), timeline (sometimes one vs. the other is on back order or limited stock), state of the art...some people just want THE BEST there is even if it isn't an appreciable audible upgrade.

This is again why I have yet to offer more than 3ch for either the Purifi or Hypex NCx500....because when pricing amplification for surround speakers, the original NCORE MP series is still the best price vs. performance range.

Sorry to ask but any reason to buy this over the NCX500 (3 channels)? These are $55 cheaper for the 3 channel version

 

[Buckeye Amps]

I believe you mean the Purifi 1ET6525SA (which is not the same as the 1ET9040BA)?

 

[Opal]

I believe you mean the Purifi 1ET6525SA (which is not the same as the 1ET9040BA)?

o yes sorry i jus realised this thread is about 1ET9040BA and not 1ET6525SA . Yes i am asking abt the 1ET6525SA

 

[Buckeye Amps]

o yes sorry i jus realised this thread is about 1ET9040BA and not 1ET6525SA . Yes i am asking abt the 1ET6525SA

With both the 3ch Purifi and 3ch Hypex NCx500, you would unlikely hear any audible difference. The choice mainly comes down to cost, availability, the better SMPS in the Hypex (for power/wattage), or just brand name preference.

 

[JZXZMM]

Did you say "Microsoft"?

YES，and intel

 

[restorer-john]

but later I accidentally touched the output line to the outer casing, and as a result, the power amplifier burned out, and there was no subsequent testing.

Oh that's sad. Bridged amplifiers don't take kindly to chassis grounding.

 

[yys310]

Actually, I have also done a simple test on 1ET9040BA, using the instruments DCA+E1DA APU+E1DA ADC. The THD+N is 0.000066% at 1K, but when the load is connected, the THD+N rises to 0.00030%. Of course, it has something to do with the ground of my power supply. Maybe my power supply is not well installed and not fully installed in the chassis, but later I accidentally touched the output line to the outer casing, and as a result, the power amplifier burned out, and there was no subsequent testing.

What the f... their short circuit protection, overload protection did not protect this condition?
That's surprising...

 

[Buckeye Amps]

What the f... their short circuit protection, overload protection did not protect this condition?
That's surprising...

For clarity, this is not one of our customers as far as I am aware

 

[yys310]

For clarity, this is not one of our customers as far as I am aware

Thanks, but isn't the protection provided by the module itself?
Is there difference in protection between yours 1ET9040BA module amps vs other amps?
Or is it that your amp won't have such problem as he mentioned?
Thanks!

 

[Buckeye Amps]

Thanks, but isn't the protection provided by the module itself?
Is there difference in protection between yours 1ET9040BA module amps vs other amps?
Or is it that your amp won't have such problem as he mentioned?
Thanks!

The module has protection, yes.

More that I cannot comment on the problem he encountered because I don't know his exact setup (such as referencing to "his power supply")

 

[Sokel]

What the f... their short circuit protection, overload protection did not protect this condition?
That's surprising...

Short-circuit and overload is one thing,grounding the (balanced) output of a bridged amp is another.
There has to be a specific protection about it and also stated specifically (and a bold warning also) .

 

[yys310]

Short-circuit and overload is one thing,grounding the (balanced) output of a bridged amp is another.
There has to be a specific protection about it and also stated specifically (and a bold warning also) .

1ET9040BA - Data Sheet (1.10)

 

[Sokel]

View attachment 397047
1ET9040BA - Data Sheet (1.10)

Yes,that's the proper way.
Which makes it odd for the damage that happened.
Without knowing the conditions though we can only speculate.

 

[Full Zhou]

What the f... their short circuit protection, overload protection did not protect this condition?
That's surprising...

It should be protected, but my actual situation did happen, and it happened twice. Both times, the MOSFET burned out. Of course, it happened when I tested with a sine wave. Maybe the music was not a problem. My 9040 module was purchased from the official store of purifi. Due to poor insulation between my terminal post and the chassis shell, when the signal was increased, the terminal post and the chassis leaked and arced, and the cause was found only after the second damage. It has now been repaired and sold.
If I'm not mistaken, the protection threshold of the bridge amplifier is to monitor the sum of the two output currents. When only one side is connected to GND, the current on one side needs to be doubled to activate protection, which should exceed the current that MOSFET can withstand. There should be no problem with a short circuit between OUT+ and OUT-.
Those who have samples can try this operation, maybe it's just this one that has a problem. I dare not do 2OHM sine wave full power test, but those who are brave can try it.

 

[Sokel]

It should be protected, but my actual situation did happen, and it happened twice. Both times, the MOSFET burned out. Of course, it happened when I tested with a sine wave. Maybe the music was not a problem. My 9040 module was purchased from the official store of purifi. Due to poor insulation between my terminal post and the chassis shell, when the signal was increased, the terminal post and the chassis leaked and arced, and the cause was found only after the second damage. It has now been repaired and sold.
If I'm not mistaken, the protection threshold of the bridge amplifier is to monitor the sum of the two output currents. When only one side is connected to GND, the current on one side needs to be doubled to activate protection, which should exceed the current that MOSFET can withstand. There should be no problem with a short circuit between OUT+ and OUT-.
Those who have samples can try this operation, maybe it's just this one that has a problem. I dare not do 2OHM sine wave full power test, but those who are brave can try it.

Conditions matter and matter a lot.
Here's a similar failure running NC502MP BTL at 4 Ohm to torture conditions.
Protections did kicked in but amp was destroyed:

Power amps: continuous output power measurements

Are you measuring built in sub amps or using some sort of external amp for passive sub use? Mostly I wouldn't worry about an amp suited to the powered sub, but would worry more about if you're trying something with a "passive" sub and another amp....

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