LightninBoy
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Probably said by a butt hurt Michigan Wolverine alumni.
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Hypex NCore - Yea or Nay?
- Thread starter squeedle
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Probably said by a butt hurt Michigan Wolverine alumni.
UniPolar
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Hypex NCore modules - seem to be a Yea at this point in time.
I may be more a*al than some, but I would not purchase an 'assembled' amp unless they can provide safety certification compliance.. I think it is possible for an assembler to self-certify in some cases .. And they may be exempt, but If they are mum when asked , then I'd say te veo luego .
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The other issue is EMI/RFI compliance .. You can see the amounts of fines levied against some violators at the FCC site..
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** ASR would do well to distance themselves from any liability for allowing businesses to essentially market themselves here in case the sellers' products are non compliant.
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Caveat emptor .
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I may be more a*al than some, but I would not purchase an 'assembled' amp unless they can provide safety certification compliance.. I think it is possible for an assembler to self-certify in some cases .. And they may be exempt, but If they are mum when asked , then I'd say te veo luego .
.
The other issue is EMI/RFI compliance .. You can see the amounts of fines levied against some violators at the FCC site..
.
** ASR would do well to distance themselves from any liability for allowing businesses to essentially market themselves here in case the sellers' products are non compliant.
..
Caveat emptor .
..
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Redundant.
Godataloss
Addicted to Fun and Learning
DIYaudio.com better run for their lives then...
If you are worried about a Hypex assembled amp, all you need to do is make sure it’s unplugged, open the case and inspect the workmanship. Hypex modules are self contained. if the connections are solid and the (very minimal) wiring is good, and the module mounting and case is good, what’s the issue?
I have the NC502MP from Audiophonics. Zero hum coming from it, used for a year on LS50’s and now on the big R11. With the R11 the amp can show its competence on high volume 
very satisfied.
RCA-XLR is not ideal. I would get power on pops, but it’s probably the DAC’s fault: SMSL SU8. Just connect rca-rca or xlr-xlr and everything is fine.
For pics.
www.audiosciencereview.com
very satisfied.RCA-XLR is not ideal. I would get power on pops, but it’s probably the DAC’s fault: SMSL SU8. Just connect rca-rca or xlr-xlr and everything is fine.
For pics.
New AUDIOPHONICS MPA-M500NC 374 euro = 415usd for monoblock NC500!
Congrats! Personally I don't like using digital volume only, so I would add a pair of inline XLR attenuators if I were you, -20dB depending on how loud you listen, and it would impact almost +20dB SINAD in the system overall for ~20 usd...
www.audiosciencereview.com
Defman
Member
After evaluating a number of options, I just put in a 500W X 2 Audiophonics Ncore amp for my L/R speakers. i picked the Ncore over the Purifi strictly on price ($400 less). It comes with switchable inputs and a trigger. Compact, elegant case. It weighs 8 pounds and the size of an elongated shoebox. I do not hear any hum or hiss even when I put my ear next to my KEF CI 5160RL. I did not hear any thump or other noises on turn on. I used a Monoprice RCA to XLR cable and seems to be working just fine. Gain is about 4 db down from prior which was easy to offset with the calibration in my Anthem MRX1120.
Very impressed with the performance and service from Audiophonics. It was shipped with 230V cords and fuse and I replaced them. Company offered a refund of 40 euros for the shipping error which I felt was fair. Definitely an option to consider if you are looking for a prebuilt amp. They offer a number of other configurations in the same form factor from mono blocks to a stereo Purifi.
Very impressed with the performance and service from Audiophonics. It was shipped with 230V cords and fuse and I replaced them. Company offered a refund of 40 euros for the shipping error which I felt was fair. Definitely an option to consider if you are looking for a prebuilt amp. They offer a number of other configurations in the same form factor from mono blocks to a stereo Purifi.
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Re: Hypex. Good enough for Frothingslosh * , umm, I mean... McIntosh. 
www.audiosciencereview.com
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* https://beerinfo.com/the-story-of-miss-olde-frothingslosh-marsha-phillips/
McIntosh MI254 Power Amplifier Teardown
Greetings, fellow ASR readers. Long time lurker, first time poster here. This is a quick teardown of a McIntosh MI254 4-channel power amplifier. This amp is used as a supplement to the Marantz SR6014 AVR for home theater duty. It is powering two front channels and two surround channels. I...
www.audiosciencereview.com
* https://beerinfo.com/the-story-of-miss-olde-frothingslosh-marsha-phillips/
total Yeay. come on.
My M22 produces total black hole silence when not playing music. claiming Hypex Ncore has hum or any residual unwanted noise is proven wrong by hundreds of measurements.
But if people's ears can't handle the truth of the recordings they listen to... pick something else that distorts it and more power to you and never apologize if u enjoy it.
My M22 produces total black hole silence when not playing music. claiming Hypex Ncore has hum or any residual unwanted noise is proven wrong by hundreds of measurements.
But if people's ears can't handle the truth of the recordings they listen to... pick something else that distorts it and more power to you and never apologize if u enjoy it.
I am going into my Hypex phase reversed. I then reverse it back into phase by reversing the speakers. The reason I do this is the 5532 input opamp sounds a lot better when running in inverting mode because it forces the audio through the NPN input transistors of the 5532, which are better than its PNP ones. No hum whatsoever.
Running an opamp in inverting mode instead of non-inverting mode requires changing the PCB.
The NCxxxMP input stage consist in 2 opamps arranged in an instrumentation amplifier. Each of the 2 opamps has it's positive input connected to one of the 2 input pins, it's negative input connected to the feedback and gain resistors.
Your wiring has unfortunately no effect on the way the opamps are running.
Applying this wiring to only one of the two channels allows to offload the power supply and potentially increase the available power two channels driven.
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If you have a balanced input it's as simple as connecting the hot output of the preamp to the minus (-) input of the amp and grounding the + input.
This is a simplified drawing of an NCxxxMP.
Explain how inverting V1 and V2 will change anything to the working principle of the front end.
It's the differential amp that you can run inverting. By feeding V1 and grounding V2 you invert the output. If the third opamp is a 5532 then it will benefit. By the way, many differential amps don't use the first two buffer amps.
This made me curious. How would that work? Where do power savings or offload come from? Certainly you can't be talking about the opamp power demands which are miniscule. How does a 180° phase offset affect the two power stages?
Because if we have mono bass and we drive the channels in opposite polarities, one channel will be drawing power from the +ve supply rail while the other will be drawing from the -ve rail. If they both are driving in the same polarity, then they will be both be drawing power from the same rail, and result in a higher demand from the power supply.
The third opamp
1. Is already running inverting
2. Doesn't exist in an NCxxxMP since it symbolize the class D stage.
I think I have already spent too much time on this, enjoy your amp, whatever wiring configuration you used.
Warning - oversimplification may hurt physics...
Since the power stages are single ended, they push or pull energy to/from the speakers from/to the supply rails depending of the sign of the voltage they output.
The 2 power stages run on the same supply rails, so when one pulls energy, this energy is available for the other channel if it needs it.
When the 2 channels have to output the same signal, on a test bench or for low frequencies in actual music, running them in opposition of phase allows to offload the power supply.
End warning
If you compare the measurements of the Purifi 1ET400A demo amp and the ones from the Audiophonics amp using the same modules and power supply, you will see an important difference in power output. The demo unit runs the modules in phase, the Audiophonics one runs them in opposition of phase.
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