So there is an output voltage from the smps for those 8 seconds? How about nAMPON, nFATAL and SMPS Standby?
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Review and Measurements of Hypex NC400 DIY Amp
- Thread starter amirm
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So there is an output voltage from the smps for those 8 seconds? How about nAMPON, nFATAL and SMPS Standby?
What do you measure at pin 31 and 35 from each NC500?
I sent the amplifier to the service, the master also can not find the smps600n400 circuit diagram, without a circuit it is very problematic to make repairs quickly. Therefore, I ask for help in finding the smps600n400 and nc500 circuitry.
So how can the amp turn on if there is no voltage?
restorer-john
Grand Contributor
It does, but the entire NC-400 OEM schematic is in that service manual starting at page 14, with all the trigger outs, interface and PIC control lines you can investigate.
Hypex NC400 amp is a completely redundant solution. You do not need to spend so much of your money to get quality sound in class D.
Graphs and figures in the review are only good for measuring devices, but not for human ears, even if we got much worse result, our ears can not distinguish the difference.
Such high power is not needed for a good home acoustics. Good acoustics works fine, consuming only 5-10 watts.
Graphs and figures in the review are only good for measuring devices, but not for human ears, even if we got much worse result, our ears can not distinguish the difference.
Such high power is not needed for a good home acoustics. Good acoustics works fine, consuming only 5-10 watts.
Depends upon the speaker and peak levels desired. My average level is about 3~5 W but to reach 100 dB peaks requires about 150 W into my speakers at my listening distance. It has more to do with the speakers and listening distance from them than the room.
What is the sensitivity of your speakers? How big is the body of the columns?
Really good speaker should have a large, voluminous housing and high sensitivity. The larger the box, the easier it is moving speaker cone, the required power is reduced.
Modern speakers make small and narrow for the sake of design and beautiful appearance, such columns is hard to "shake", so it became the fashion for power amplifiers. But the truth will prevail, I hope.
Revel Salon2, 86.4 dB/2.83 Vrms/m so about 83.4 dB/W/m across much of their range using 4-ohms for reference. They are pretty large IMO. Sensitivity is one design trade among many; it is not always possible to achieve high sensitivity and meet other design goals.
My previous speakers, Magnepan, were even lower. And there are lots of other speakers around that need more than a few watts to reach typical peak levels... A pair of 90 dB/W/m speakers ten feet away still need about 150 W to reach 105 dB at the MLP.
The need for a couple of hundred watts to avoid clipping is not all that unusual in my experience.
My previous speakers, Magnepan, were even lower. And there are lots of other speakers around that need more than a few watts to reach typical peak levels... A pair of 90 dB/W/m speakers ten feet away still need about 150 W to reach 105 dB at the MLP.
The need for a couple of hundred watts to avoid clipping is not all that unusual in my experience.
Oh my god ... why so much a kilo, so the power amplifier for home?
Oh yes .... such quality amplifiers in test and such a low-quality implementation in practice ... is not there a trick? ;-)
Maybe the lesson is that even if class D amps are very efficient, they still generate some heat, and need decent air circulation?
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