Buckeye Amps: 2nd Generation Purifi EIGENTAKT 1ET9040BA Amplifier

[shion_ca]

Will be posting them next week. Been a little busy.

But yes, same THD and SNR.

Poke

 

[Buckeye Amps]

Poke

Haven't forgotten. Just a little busy filling orders.

 

[shion_ca]

Haven't forgotten. Just a little busy filling orders.

I gave you extra time on that, so you can post my specs

 

[Buckeye Amps]

I gave you extra time on that, so you can post my specs

The measurements with the Micro Audio SMPS were posted.

I meant I still need to take measurements with the Hypex SMPS.

 

[Analoglesspursuit]

The measurements with the Micro Audio SMPS were posted.

I meant I still need to take measurements with the Hypex SMPS.

Do you have that backwards?

 

[Buckeye Amps]

Do you have that backwards?

No?

 

[shion_ca]

Do you have that backwards?

I was teasing him because I asked him to delay delivery of my Hypex power supplied 9040 monos. Obviously I wasn't Dylan's only order so probably didn't free up time, it was humour.

 

[sandeep_s300]

I was teasing him because I asked him to delay delivery of my Hypex power supplied 9040 monos. Obviously I wasn't Dylan's only order so probably didn't free up time, it was humour.

Forget the measurement . Let him build the amps and let his customer enjoy music . He have my monos to build and then a multichannel

 

[alecm]

I meant I still need to take measurements with the Hypex SMPS.

would be very grateful!

 

[blackiridium]

Will have final measurements hopefully next week.

We are modifying one of the boards to test the OPA1612 in place of the OPA1656. While inaudible, the 1656 does have slightly higher noise than the 1612. And after talking with Purifi we also learned that Bruno's original comment recommending the 1656 was taken out of context...Purifi themselves still use the 1612 on their EVAL boards.

Just want to make sure the best possible product is being put out. This won't result in any major delays, just a few extra days to test.

Hi, I was wondering if a decision was made on this as your amps are still being advertised with the opa1656s

 

[Buckeye Amps]

Hi, I was wondering if a decision was made on this as your amps are still being advertised with the opa1656s

Sticking with the OPA1656.
There was also a little bit of confusion when talking with Purifi....their EVAL 1-3 boards use the 1612 and their EVAL4 board uses the 1656. In the grand scheme of things, both are ideal choices. So we stuck with the OPA1656 (it actually had slightly better noise measurements over the 1612 once put into the full design).

 

[Buckeye Amps]

It's really nice Buckeye has the gear on hand to make these kinds of judgment calls (OPA1612 vs OPA1656) before production. Would it also be possible to publish Watts used (at the outlet) while idle before the 10 minute energy reduction window kicks in? I have found for most normal listening levels this data is usually within a watt or two of the average power used by the amp. Thank you!

Yes, I can get that out as well once I get caught up on existing orders.

 

[noiseless]

Anyone, who already got their 1ET9040 builds care to share how do they sound, please? Any differences/similarities with 1ET400?
Thank you!

 

[Salt]

What "sound" should be expected from your point of view?

 

[shion_ca]

Anyone, who already got their 1ET9040 builds care to share how do they sound, please? Any differences/similarities with 1ET400?
Thank you!

To save you some pain, they will steadfastly lambaste anyone claiming a 400 sounds different than a 7040 from a 9040 from any other amp that measures about the same. You’ll just get attacked for asking about sound differences between these amps unless you’re talking at power levels where one of the amps won’t have sufficient.

Similarly asking about modern op amp sound comparisons for those performant modern ones will earn you the same gleeful scorn. I don’t even dare mention my power cords or isolation platforms

 

[noiseless]

What "sound" should be expected from your point of view?

I don't have my "point of view" since I don't own either of them but there should be some differences if the one is twice more expensive than the other, except the pure power, or...?
Like better grip, tighter bass, etc. or no difference at all - you tell if you have both amps and blind A/B tested them.
If you haven't then you are not helping much!

 

[noiseless]

To save you some pain, they will steadfastly lambaste anyone claiming a 400 sounds different than a 7040 from a 9040 from any other amp that measures about the same. You’ll just get attacked for asking about sound differences between these amps unless you’re talking at power levels where one of the amps won’t have sufficient.

Similarly asking about modern op amp sound comparisons for those performant modern ones will earn you the same gleeful scorn. I don’t even dare mention my power cords or isolation platforms

Thank you!
Regretted that I ask!

 

[Salt]

You could have known before asking ...
(Why? ASR is a library full of technical stuff and skills around audio and even beyond, and reading as well as understanding all this may take months, maybe years, at actual state of data, but feel free to use search and you will get what answers the question)

 

[Julf]

there should be some differences if the one is twice more expensive than the other

Why? What is the difference in jewelry that is twice more expensive? Hardness? Shine? - No, brand.

 

[Buckeye Amps]

Why? What is the difference in jewelry that is twice more expensive? Hardness? Shine? - No, brand.

Yea but also not the same here (both are Purifi brand, for one).

To be clear, there are measurable differences between the two and the cost difference largely reflects the greater power output of the 9040BA over the 400A while maintaining lower distortion and noise floor. It is, for simplest terms, Purifis new SOTA.

Will someone hear an audible difference over the 400A? Unless they were pushing the limits of the 400A and hearing distortion or clipping, probably not, no.