OK, for 200W we need +/- 60V ....
I was commenting on Billshurv's remark on A/B amps (# 10526) and Julf's reaction (# 10529).
Not talking about class A.
I was commenting on Billshurv's remark on A/B amps (# 10526) and Julf's reaction (# 10529).
Not talking about class A.
Transformer, diode, and capacitor leakage losses in an appropriately sized for 200W class AB PSU? I'm pretty sure the break-even on linear versus switching PSU is lower than 15W idle. Anyone have a kill-a-watt and can plug in your favorite AB amp? 🙂
so up to 6W per channel and ignoring the diode drops and transformer losses in the calculation?
Hypex note the SMPS idle loss at 9W. For a power supply that will drive a stereo amplifier.
Hypex note the SMPS idle loss at 9W. For a power supply that will drive a stereo amplifier.
What happened to your fancy Monitor Audio speakers? Did you ditch them right before the Nord purchase?
No Sir, I have them and listening intensely right now, simultaneously viewing an image of Futurama's Hypnotoad, hypnotising myself into believing they are the very best there is so I won't spend any more money 8-}
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The difference in idle dissipation between class AB / LPS and class D / SMPS will be pretty negligible.
2 x NC400 + 1 x SMPS600 would take 18W; 200W class A/B + LPS a bit less.
Efficiency of NC400 will be lower than 93% average (93% only at full power); efficiency of class A/B some 50% ?
So in the end the difference in average power consumption of both amplifiers (amplifying music signals) will be pretty meaningless IMO.
You still haven't given the name of a commercial class A/B amplifier that will deliver 400w into 4Ohms and a stereo amp will idle at under 20W. I've never found one. Or are you comparing apples with guava ?
Indeed. Let's compare actual amplifiers, not some over-simplified calculations.
You are right guys: commercial A/B amps with idle dissipation comparable with NC400/SMPS are very rare.
I had a Yamaha P2500S here shortly which has about the same power and idles at 25W and sounded very good, but most hifi-ish A/B amps have higher idle dissipation.
I had a Yamaha P2500S here shortly which has about the same power and idles at 25W and sounded very good, but most hifi-ish A/B amps have higher idle dissipation.
I believe bavmike has isolated the issue to the boards - or at least exchanging the boards for the ones made by Hypex does not replicate the issue. Bavmike will no doubt confirm or correct the above.
Yes as I said, there's no noise with all of the other same components connected to the Hypex boards. This means the only thing that the noise could be coming from is the boards.
Hi I can report I hear no noise from mine. And indeed many customers comment on the silent, silent parts. Here is a mail from a customer. Hi Colin,
The Nord Ncore amps are amazing. They will have been running 2 weeks straight this coming Monday 2-22-16. They were pretty great out of the box but, for my taste, the treble/highs had a bit of a bite. Now, they are very smooth and sweet. Very powerful and they are dead quiet, so quiet it's wonderful. Details come out of nowhere. I listen a lot late at night and at low volume, they are clear and clean. For the roughly $2300 delivered, a bargain. I like them better than the Devialet that I had. They have more tone/density/body. Just wonderful. I find the Sparkos op amp perfect for my taste.
Thank you so much for a wonderful product. Excellent service and awesome quality.
The Nord Ncore amps are amazing. They will have been running 2 weeks straight this coming Monday 2-22-16. They were pretty great out of the box but, for my taste, the treble/highs had a bit of a bite. Now, they are very smooth and sweet. Very powerful and they are dead quiet, so quiet it's wonderful. Details come out of nowhere. I listen a lot late at night and at low volume, they are clear and clean. For the roughly $2300 delivered, a bargain. I like them better than the Devialet that I had. They have more tone/density/body. Just wonderful. I find the Sparkos op amp perfect for my taste.
Thank you so much for a wonderful product. Excellent service and awesome quality.
What input boards was he using? It's not much noise, but it's audible. But isn't audible with the Hypex boards.
hypex ncore
Yeah seen that was just editing. Anyways it's not much noise. If someone had a tube preamp or something it would be noisier. I'm guessing about 100 db S/N ratio based on other gear I've tried that had about the same level of noise. For example the Hypex PSC-2.400's with my DAC connected to the analog inputs is rated as S/N 101 and it's about the same level of hiss. It would only bother someone with really sensitive speakers.
Yeah seen that was just editing. Anyways it's not much noise. If someone had a tube preamp or something it would be noisier. I'm guessing about 100 db S/N ratio based on other gear I've tried that had about the same level of noise. For example the Hypex PSC-2.400's with my DAC connected to the analog inputs is rated as S/N 101 and it's about the same level of hiss. It would only bother someone with really sensitive speakers.
Any chance of actually measuring it, or even a spectrum plot (just using software FFT)?
I don't have the gear here. It's just a slight hiss when I put my ear to the speaker. Swap the board to the Hypex, and sounds like the amps are off. For anyone used to class A or A/B amps it would be considered low noise.
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