Can class D "degenerate"? a tale of a Nuforce MCH 300SEC7

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deanorth

  • Jr. Member
  • Posts: 7
hello there

Stephane, from France:)
In my homecinema setup, gear wise, I own an Anthem AVM90 pre amp, and for powering my surround, surround back and atmos, a Nuforce MCH 300SEC7.
I was very, and I mean very happy with it, despite channel 4 was not working (I have bought it second hand 1 year ago), but the sound was really great. It was powering for Sr, waterfall Victoria EVo, Sr back Hurricane Evo, and 4 focal atmos. My central speaker is powered by a mono amp. My front are stuck with my hifh gear, based on Mola Mola products
So not very power hungry things.
Two months ago, I started hearing "poc" on my speakers when the amp was powering up. And since the XLR base were kinda lose, I decided to change them. A friend of mine know a guy that was an electronician tech guy, and was ok to solder the XLR embase. he also took a look at why the channel 4 was not working, and.... the conclusion he drew were kinda an horror to me:
- the PSU is at max 60% of it's original capacity
- all the the condo from the two control area are tired or close to not beeing good anymore, and need to be changed
- channel 4 is at 40% capacity, that's why it's on fault and no powering up
- all the other channels are between 50-55% capactiy

which means I need to rebuild everything inside, which will cost around 3K euro...
considering I have bought it 1.5k euros, that's a lot, but that amp was 6k euro new, so that still sound logical

yet, I was not aware that the power unit could kinda "crumble" like that, efficiency wise. Condo, I know they grow old, but I thought we were talking 20/30 years lifespan, not 10 or less. And the class D module, 55% overall capacity, how is that even possible?

Yeah, I know close to nothing about how electronical component work, I have no shame in that, it's not my area of expertise. But I have a hard time saying to myself I'm going to throw that amp away, so if anyone got any experience and can tell me if what i'm going through is normal in the life of a Nuforce product....?

toocool4

Re: Can class D "degenerate"? a tale of a Nuforce MCH 300SEC7
« Reply #1 on: 4 Feb 2025, 12:39 pm »
Try sending a message on this site to @rustydoglim, Jason is from NuForce

rustydoglim

Re: Can class D "degenerate"? a tale of a Nuforce MCH 300SEC7
« Reply #2 on: 4 Feb 2025, 03:27 pm »
It has been MORE THAN 10 years since any Nuforce high-end products were released and Nuprime no longer provide any support.

If you still own a Nuforce product, you may contact sales@nuprimeaudio.com for a discount toward Nuprime product.

deanorth

  • Jr. Member
  • Posts: 7
Re: Can class D "degenerate"? a tale of a Nuforce MCH 300SEC7
« Reply #3 on: 5 Feb 2025, 03:18 pm »
Thanks for the reply.
I'm not sure this is related to nuforce or nuprime, but more of a general question towards electronical component and the way they degenerate (or not) in the long run :) thanks for the name, i'l contact him:)

Stephane

AllanS

  • Full Member
  • Posts: 679
Re: Can class D "degenerate"? a tale of a Nuforce MCH 300SEC7
« Reply #4 on: 6 Feb 2025, 11:50 am »
Speaking from no specific experience or knowledge, it wouldn’t surprise me if PS output degrades over time.  I’ve read many comments about recapping “older” electronics, presumably because capacitor performance degrades.  If degrades means limited capacitor charge then it would make sense for a PS output to be affected.
But this is hardly unique to class D amps.
You might try posting your question to The Lab for an informed opinion
https://www.audiocircle.com/index.php?board=20.0