Buckeye Amps: 2nd Generation Purifi EIGENTAKT 1ET9040BA Amplifier

[Buckeye Amps]

Awesome, can you confirm what the gain options willl be? Looking for a 19 or so as I need more granularity on my preamp

Let me get official values finally.

 

[shion_ca]

Let me get official values finally.

Any news? Do you have a date in mind you are officially releasing your specs and taking orders?

 

[Buckeye Amps]

Any news? Do you have a date in mind you are officially releasing your specs and taking orders?

I will be testing a final production build on the AP in the next 10 days or so, then orders will open up

 

[goryu]

July 1st...Any updates as to the time frame?

 

[Buckeye Amps]

July 1st...Any updates as to the time frame?

Final testing will hopefully be done this week. Everything is in stock. Just want to button up our production model. With the holiday week it might be a little slow getting done by end of week though

 

[goryu]

Final testing will hopefully be done this week. Everything is in stock. Just want to button up our production model. With the holiday week it might be a little slow getting done by end of week though

Looking forward to getting some finalized details as to the gain, etc. Thanks again-

 

[pma]

The biggest benefit is voltage. While the Hypex SMPS1200A180 nominal voltage is 46VDC

SMPS1200A400 or SMPS1200A700 would give you the requested nominal voltage.

Order Hypex SMPS1200A400 power supply

Buy the SMPS1200A400 online at SoundImports ✓ Same day shipping ✓ Low shipping rates

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Order Hypex SMPS1200A700 power supply

Buy the SMPS1200A700 online at SoundImports ✓ Same day shipping ✓ Low shipping rates

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[Buckeye Amps]

SMPS1200A400 or SMPS1200A700 would give you the requested nominal voltage.

Order Hypex SMPS1200A400 power supply

Buy the SMPS1200A400 online at SoundImports ✓ Same day shipping ✓ Low shipping rates

www.soundimports.eu

Order Hypex SMPS1200A700 power supply

Buy the SMPS1200A700 online at SoundImports ✓ Same day shipping ✓ Low shipping rates

www.soundimports.eu

Both of those exceed the max rating

 

[pma]

Both of those exceed the max rating

Oh, I see. It has quite low supply voltage due to bridged mode.

 

[Buckeye Amps]

Here are the gain settings:

4 ohm - 25.5dB/2.9Vrms (High), 20.5dB/5.2Vrms (Medium), 15.5dB/9.2Vrms (Low)
8 ohm - 25.5dB/2.9Vrms (High), 20.5dB/5.2Vrms (Medium), 15.5dB/9.2Vrms (Low)

 

[goryu]

Here are the gain settings:

4 ohm - 25.5dB/2.9Vrms (High), 20.5dB/5.2Vrms (Medium), 15.5dB/9.2Vrms (Low)
8 ohm - 25.5dB/2.9Vrms (High), 20.5dB/5.2Vrms (Medium), 15.5dB/9.2Vrms (Low)

Please correct me if I am wrong, but if one is using a dac with a 4.2V output, using the medium gain setting would result in less than full output- making the added output of the Micro smps useless and using the High setting one would risk over driving the amp...

 

[Buckeye Amps]

Please correct me if I am wrong, but if one is using a dac with a 4.2V output, using the medium gain setting would result in less than full output- making the added output of the Micro smps useless and using the High setting one would risk over driving the amp...

In real world usage you'd likely begin to hurt your ears before you clipped the amp.

 

[goryu]

In real world usage you'd likely begin to hurt your ears before you clipped the amp.

For most that is probably true with either power supply but for speaker loads that dip down to 1 ohm or less, in a large room, I wonder if that would still be the case...Using an nc1200 amp currently with Acoustat Model 3 speakers my normal listening volume is at a Okto dac volume setting at -20dB. I would see turning it up to nearly full volume without any hearing damage.

 

[Buckeye Amps]

For most that is probably true with either power supply but for speaker loads that dip down to 1 ohm or less, in a large room, I wonder if that would still be the case...Using an nc1200 amp currently with Acoustat Model 3 speakers my normal listening volume is at a Okto dac volume setting at -20dB. I would see turning it up to nearly full volume without any hearing damage.

To date with a lot of different combinations of DACs/Preamps/Processors, there have not been any issues with our High gain and 4v (or more) nominal output from the source (this includes the Purifi 1ET400A models, 1ET7040SA models, and the Hypex NCx500 models).

 

[MGJ]

Here are the gain settings:

4 ohm - 25.5dB/2.9Vrms (High), 20.5dB/5.2Vrms (Medium), 15.5dB/9.2Vrms (Low)
8 ohm - 25.5dB/2.9Vrms (High), 20.5dB/5.2Vrms (Medium), 15.5dB/9.2Vrms (Low)

Thank you for the update. I hope you're getting comfortable using the AP555X. Happy 4th.

 

[goryu]

To date with a lot of different combinations of DACs/Preamps/Processors, there have not been any issues with our High gain and 4v (or more) nominal output from the source (this includes the Purifi 1ET400A models, 1ET7040SA models, and the Hypex NCx500 models).

I'm not saying there would necessarily be a problem using the high gain setting with 4.2V input under normal circumstances, just that in the case of a low impedance load and a larger room, one might drive the amp into clipping/shutdown with less than full volume. Alternatively, using the medium gain setting results in a situation where there is the potential for output power to be out of reach, negating the benefit of the additional output capacity of the Micro smps. Stated simply, it is too bad that there isn't a gain setting that better matches the standard 4.0V balanced input standard. I believe as originally posted the tentative gain settings were more in line with the 4.0V standard- why did they change?

 

[Buckeye Amps]

I'm not saying there would necessarily be a problem using the high gain setting with 4.2V input under normal circumstances, just that in the case of a low impedance load and a larger room, one might drive the amp into clipping/shutdown with less than full volume. Alternatively, using the medium gain setting results in a situation where there is the potential for output power to be out of reach, negating the benefit of the additional output capacity of the Micro smps. Stated simply, it is too bad that there isn't a gain setting that better matches the standard 4.0V balanced input standard. I believe as originally posted the tentative gain settings were more in line with the 4.0V standard- why did they change?

To keep the gain stages similar/identical to our existing amps in case customers want to mix/match.

 

[goryu]

Thanks.

 

[Doodski]

@Buckeye Amps. When you finalize the name of the new integrated amplifier let me know and I'll add it to the Class D Amplifier List. Thanksssss

ASR list of known class D home audio amplifiers.

Any suggestions are welcome. Post suggestions here. I will gather the details and add them. Thanks. :D This will be organized as results come in. So give me brand names and model numbers of class D amps and I'll create the list just like the EQ/PEQ webpage @ ASR is done. 3E Audio 260-2-29A PFFB...

www.audiosciencereview.com

 

[pogo]

Stated simply, it is too bad that there isn't a gain setting that better matches the standard 4.0V balanced input standard.

A mismatch is the rule rather than the exception in the real world. Matching is generally not trivial, as you can also see here:
NAD has added a gain stage to increase its headroom so that it works better with the DSP circuits of its room-correction software and tone controls. NAD concedes that this slightly decreases the M33’s signal/noise ratio, but with careful design and premium parts, and because the Eigentakt’s S/N is so low to begin with, the noise is still inaudible.
Source: soundstagehifi.com