BUCKEYEAMPS Hypex NCx500 Amplifier 2channel Review

[Toni Mas]

It was just rated power! I didn't think running on limit-tensioned edge.
And limits <- It should be the point after protection triggered so It should be an area that is forever out of reach for the average consumer(including me).

Headroom, It is just called headroom.
If you insist in making continuous use of the last 3dB it's your problem. Or It should be!

 

[thin bLue]

We need protection on speakers as well!

To put some things into perspective, Marantz has its PM-10 running bridged HypeX NC500OEM, not the NCx500OEM, but they choose to only use a SMPS600 for each pair. They also rate it for 200W into 8 ohms only and 400W into 4 ohms even though the BRIDGED NC500 could do more.

There was a lot of discussion about the extra effort Marantz put into reliability in various interviews since it was their first high end Class D amp.

The service manual highlights the protection circuits that Marantz puts in (white), the protection circuits by the NC500 and the protection setup by the SMPS600. I don’t know if these are in the Model 30.
View attachment 303794

I can not Agree more!
Well-protected consumers can enjoy music with confidence, which means a more enjoyable audio life!

 

[thin bLue]

The tester was not aiming to break anything. They read the specs and tested to confirm if they are true or not. Don’t you want to be sure if the manufacturer is true to their words?

1000000000000000% right!

 

[kongkong]

Why push the gear to its limits?
Dont understand...

As You can see, he just tested after reading spec sheets.
And Someone wants to use those high specification amplifiers for owner's system which needs much power.
It can be connected to system safety and consumers' resonable right as basic test.

 

[thin bLue]

+1 for this.

Reliability is important for a number of reasons, ranging from protecting downstream speakers, to social responsibility not to increase our electronics landfill. I don’t think anyone is asking every product to have a 50 year operational life span, but it should meet advertised specifications and in the modern day, things like DC protection or overcurrent protection unless you are dealing with stuff like vintage tubes (for overcurrent issues).

Still, this reliability is often why DIY products are a lot cheaper than commercial options. I am curious what sort of protections you get with the AMP10 from Marantz…

For good for everybody on earth!

 

[sarumbear]

Headroom, It is just called headroom.
If you insist in making continuous use of the last 3dB it's your problem. Or It should be!

Who said so? Where do you read it in their specs?

Meanwhile, do you know what 3dB headroom is? How much power should this 700W amplifier deliver after that headroom of yours?

 

[Toni Mas]

Who said so? Where do you read it in their specs?

Meanwhile, do you know what 3dB headroom is? How much power should this 700W amplifier deliver after that headroom of yours?

3dB are 50% or 350W, 6dB 25%, 10dB 10%
And mind you, i have never broken anything in my life!

 

[sarumbear]

3dB are 50% 6dB 25% 10dB 10%
And mind you, i have never broken anything in my life!

In other words you say this 700W amplifier should be tested at 350W.

That “last 3dB” you mentioned is in fact half of the specified power, hence in your view every amplifier should be tested at half its rated power. Is that what you meant?

 

[thin bLue]

Headroom, It is just called headroom.
If you insist in making continuous use of the last 3dB it's your problem. Or It should be!

When headroom do not provide room for head and just cut the head with massive brick wall at the place, we can say that "It does not providing enough headroom".
Nobody wants to put the head on the guillotine, but the cozy headroom is all different story. Everyone want to check how cozy it is.

 

[sarumbear]

When headroom do not provide room for head and just cut the head with massive brick wall at the place, we can say that "It does not providing enough headroom".
Nobody wants to put the head on the guillotine, but the cozy headroom is all different story. Everyone want to check how cozy it is.

 

[Toni Mas]

When headroom do not provide room for head and just cut the head with massive brick wall at the place, we can say that "It does not providing enough headroom".
Nobody wants to put the head on the guillotine, but the cozy headroom is all different story. Everyone want to check how cozy it is.

Is this amp designed for PA use by guys who never can afford the reasonable headroom they should have and pay for, or for home or studio use by more conservative users?

 

[thin bLue]

As You can see, he just tested after reading spec sheets.
And Someone wants to use those high specification amplifiers for owner's system which needs much power.
It can be connected to system safety and consumers' resonable right as basic test.

Yes. Everyone should get what they pay for. The only way to check it is to see if things match up with the spec sheet. However, it is quite difficult depending on the type of product, so there are cases I have to do it on behalf of someone. That's also why I'm doing this.

 

[Apollon Audio]

Thank you for your response.

Since the test I did was conducted with 150 points, I spend a much longer time in the high power area. Therefore, it is expected that the protection circuit will operate quickly in the area where continuous output is impossible.

If your design was designed and tested to handle short peaks safely, expect to see a slightly different graph since this test is testing a more leisurely(?), gradual power increase than short peaks.

By the way, the illuminated front panel is a really cool look!

Thank you for your response.

Since the test I did was conducted with 150 points, I spend a much longer time in the high power area. Therefore, it is expected that the protection circuit will operate quickly in the area where continuous output is impossible.

If your design was designed and tested to handle short peaks safely, expect to see a slightly different graph since this test is testing a more leisurely(?), gradual power increase than short peaks.

By the way, the illuminated front panel is a really cool look!

I just re-ran the test with 150 points. Still getting the same power out of this configuration.

 

[Sokel]

I just reran the test with 150 points. Still getting the same power out of this configuration.

How is that amp mounted?
Normal case or with heatshinks and stuff?

 

[PeteL]

Headroom, It is just called headroom.
If you insist in making continuous use of the last 3dB it's your problem. Or It should be!

in 100% of Amir's amplifiers reviews, He brings the amp to clipping and It's not a common thing for the Power supply to fry in the process. How do you recommend Amir measures max power?

 

[Apollon Audio]

How is that amp mounted?
Normal case or with heatshinks and stuff?

Normal case without any additional heatsinks.

 

[Toni Mas]

in 100% of Amir's amplifiers reviews, He brings the amp to clipping and It's not a common thing for the Power supply to fry in the process. How do you recommend Amir measures max power?

Not a useful data. Dont care at all!

 

[sarumbear]

Not a useful data. Dont care at all!

Well we do, and don’t much care about members with your attitude either.

May I ask; why are you on ASR?

 

[Sokel]

Not a useful data. Dont care at all!

Then you're at the wrong place.

 

[DMill]

Is this amp designed for PA use by guys who never can afford the reasonable headroom they should have and pay for, or for home or studio use by more conservative users?

Its intended use is 700w. Whether it drives PA speakers or your home computer speakers is completely irrelevant. I’m not sure what your point is. I can’t imagine anything being so black and white as this situation.