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Buckeye Amps: Hypex NCx500 Official Thread

twm

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It's been two weeks since the last update - anyone received theirs yet?
 

goryu

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It's been two weeks since the last update - anyone received theirs yet?
Nope. It's also been two weeks since the long awaited SMPS which have been said to be the cause of the delay began rolling off the production line. The wait continues.
 
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Buckeye Amps

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The SMPS is in the manufacturing plants hands and I am at the mercy of their schedule and workload (as they are responsible for A LOT of PCB/component production around the world).
 
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The 2kW SMPS’ for the 3ch builds are starting to trickle in
 

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gby

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Pretty cool :cool:.

Trying to get oriented. In the picture you attached the top of the picture with the silver fins is the back side of the front panel and at the bottom of the picture are the speaker outputs. Do I have that orientation correct?
 

ryanosaur

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Pretty cool :cool:.

Trying to get oriented. In the picture you attached the top of the picture with the silver fins is the back side of the front panel and at the bottom of the picture are the speaker outputs. Do I have that orientation correct?
You are correct
 

goryu

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My 3 channel NCx500 amps have arrived at long last.

Here's a question...The variable gain is given as:

*Gain settings, if using the Buckeye buffer stage:
4ohm - 24.2dB/3.2Vrms (High), 19.2dB/5.8Vrms (Medium), 14.2dB/10.3Vrms (Low)
8ohm - 24.2dB/3.4Vrms (High), 19.2dB/6.0Vrms (Medium), 14.2dB/10.8Vrms (Low)
*Gain setting, if using the Hypex onboard buffer stage:
4ohm - 26.8dB/1.88Vrms
8ohm - 26.8dB/1.95Vrms


Curious, since this amp has XLR inputs, and my understanding is that the standard for such is 4Vrms, why there isn't a gain option that matches? Seems with my Octodac, which outputs the standard 4Vrms, I can either choose the High setting, and take care not to go near full output on the dac, or go to the Medium setting, and not have access to full power. Do I have that right?
 

Dr. Cyrax

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@goryu, if I can ask, when did you order yours?
I am eagerly waiting on my order, got a bunch of movies I have saved for when this arrives! And plz share how it is!!
 

goryu

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when they were first announced here sometime about 9 months ago I think.
 

Rick Sykora

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My 3 channel NCx500 amps have arrived at long last.

Here's a question...The variable gain is given as:

*Gain settings, if using the Buckeye buffer stage:
4ohm - 24.2dB/3.2Vrms (High), 19.2dB/5.8Vrms (Medium), 14.2dB/10.3Vrms (Low)
8ohm - 24.2dB/3.4Vrms (High), 19.2dB/6.0Vrms (Medium), 14.2dB/10.8Vrms (Low)
*Gain setting, if using the Hypex onboard buffer stage:
4ohm - 26.8dB/1.88Vrms
8ohm - 26.8dB/1.95Vrms


Curious, since this amp has XLR inputs, and my understanding is that the standard for such is 4Vrms, why there isn't a gain option that matches? Seems with my Octodac, which outputs the standard 4Vrms, I can either choose the High setting, and take care not to go near full output on the dac, or go to the Medium setting, and not have access to full power. Do I have that right?

Wow, not many power amps offer 5 different gain settings! Buckeye did not document the 12 dB option if you disable all the buffers. You can mix and match gains with his other amps or match to Hypex ones.

You waited months for these amps and you did not the find the posted gain options until you got them? Not having one that exactly matches your Okto‘s seems pretty minor. Is there another amp is offering a better gain option with as much power per channel?
 

goryu

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Wow, not many power amps offer 5 different gain settings! Buckeye did not document the 12 dB option if you disable all the buffers. You can mix and match gains with his other amps or match to Hypex ones.

You waited months for these amps and you did not the find the posted gain options until you got them? Not having one that exactly matches your Okto‘s seems pretty minor. Is there another amp is offering a better gain option with as much power per channel?
For some reason I don't see the answer to my question in the above...
 

Rick Sykora

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For some reason I don't see the answer to my question in the above...
You do not know the answer? Aren't you designing an active multi-way speaker?
 
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goryu

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Still no answer. What is the point of your postings?
 

Rick Sykora

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Still no answer. What is the point of your postings?

Your gain matching complaint is insignificant relative to the overall problem you are trying to solve. In any case, it does not belong in this thread.

If you want an answer, start your own thread and state the problem you are trying to solve.:)
 
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goryu

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It seems entirely appropriate to ask questions related to a products specs/performance in a thread about said product. What's it to you anyway? Either answer the question or run along. If anything, your off topic remarks don't belong in this thread.
 

MAB

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It seems entirely appropriate to ask questions related to a products specs/performance in a thread about said product. What's it to you anyway? Either answer the question or run along. If anything, your off topic remarks don't belong in this thread.
I am just wondering what application you envision that requires the type of gain matching you claim you need.
My answer to your concern about max volume vs. overload is no. But without understanding what you are doing that requires this, hard to tell if this is important or just going OCD on specs.
 

Sokel

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It seems entirely appropriate to ask questions related to a products specs/performance in a thread about said product. What's it to you anyway? Either answer the question or run along. If anything, your off topic remarks don't belong in this thread.
I would go for the medium so I can take advantage of the better SNR of the DAC.
It might also be a good idea if the VC before the amp is not some rock-solid solution but a digital one susceptible to max to 0db for it's own reasons.
 
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