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Old 9th January 2013, 11:51 PM   #5901
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@Juhleren.
I think ChrisPa was referring to the "error" signal, that is the difference between two different signals (input and output in our case). it's a common practice to assess quality in the pro world, AFAIK.
if that's so, headphones would be useful as even with entry level ones vs high-end loudspeaker systems, they put the loudspeakers to shame, detail-wise (because of room acoustics influence? because of a single truly full-range driver being used?). and if it's an error signal you're listening to, it would be pointless to try to listen for the same qualities as in regular listening (sound stage, transparency etc) because it will sound very different from the actual music. and you can use a realistic load for the amp when testing, it can be a simulated one.
again, just speculating from the available data.
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Last edited by mr_push_pull; 9th January 2013 at 11:55 PM.
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Old 10th January 2013, 12:18 AM   #5902
ChrisPa is offline ChrisPa  United Kingdom
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Maybe Bruno will reply, but if i were using this as a testing regime i would listen to both the difference signal and the the two (before and after) audio signals.

And obviously the output signal would be into a proper loudspeaker load(s). There's absolutely no point trying make observations purely into a headphone load - i think that goes without saying.
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Old 10th January 2013, 01:54 AM   #5903
robbbby is offline robbbby  Canada
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Quote:
Originally Posted by ds23man View Post
And now for something completely different:

Rubber band mod on the smps!

No standby boards?
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Old 10th January 2013, 02:06 AM   #5904
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Originally Posted by ChrisPa View Post
Maybe Bruno will reply, but if i were using this as a testing regime i would listen to both the difference signal and the the two (before and after) audio signals.

And obviously the output signal would be into a proper loudspeaker load(s). There's absolutely no point trying make observations purely into a headphone load - i think that goes without saying.
I don´t recall Bruno mentioning listening to an error signal. (maybe I missed it)
I believe that he made the mentioned assessments based on listening to signal -probably music... I guess that switching between amps´ outputs and source´s output must have been his base of comparison when has stated that no audible difference is detectable between some of his amps including the ncore´s.

Including a load introduces yet another distorting element. If this has been done, I believe that no difference has been audible. -but not because of the amps....

Why not just stick´em into a few decent loudspeaker system and listen to music for comparison -which also is their actual purpose?
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Old 10th January 2013, 07:44 AM   #5905
Julf is offline Julf  Europe
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Originally Posted by Juhleren View Post
Interesting though, is that this number-game in practice does not seem to be consistent in how it conveys into music..
We must take into account that some forms of distortion and non-linearity is often perceived as pleasant...
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Old 10th January 2013, 09:31 AM   #5906
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This thread has gone downhill with wild speculation and uncorroborated reports about microphonics that go against the experience of all other users. Might one suggest we ignore the wilder claims and not feed the idiot fires from the leftfield fraternity?
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Old 10th January 2013, 09:40 AM   #5907
Julf is offline Julf  Europe
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Originally Posted by sq225917 View Post
This thread has gone downhill with wild speculation and uncorroborated reports about microphonics that go against the experience of all other users. Might one suggest we ignore the wilder claims and not feed the idiot fires from the leftfield fraternity?
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Old 10th January 2013, 10:37 AM   #5908
ds23man is offline ds23man  Netherlands
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Originally Posted by robbbby View Post
Rubber band mod on the smps!

No standby boards?
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Old 10th January 2013, 10:04 PM   #5909
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As of now I'm a member in the NC400 Club. For the time beeing I put them (as mononlocks) in neat boxes made of acrylic glass, which I had in place occaisionally. Don't know if this will last. First because the boxes are about ten years old which shows (originally needed for external xovers), second because I'm not an artist in building amps (which shows even), third because I like big and heavy cases.
I strongly believe that nobody of my HiFi friends will take these amps for serious, if they see them in these cases. But I believe they will change their mind once they listen to them.
Although I have not time enough for serious listening right now, what I hear from the first songs played to check the amps is really promising.
I am/was very happy with my old ARC Classic 120. Since I have to buy new tubes for 700€ every second year and need someone to trim the bias then, which costs another 200€, I was thinking about something more "modern". Originally I was thinking about buying the ARC Reference 210 for ten times the amount i have sent to the Netherlands for the NCores.
Although the Ref 210 need even new tubes every 2.000h ( and that is for me two years), at least they have an auto-bias, which enables me to change the tubes by myself.
So, why then NCores? Originally I was affected by the announcement of Paul McGowan, owner of PS Audio, that he is planning to build new amps using the NCores. I own both the PWT and the PWD MKII, and I really like the approach of PSA. While we discussed Paul's idea in the PSA forum it showed, that Paul can't buy the NC400 due to the DIY policy of Hypex. While searching the net for information, I found this very helpful thread.
Although I like to read about amps, I like listening to amps even more. That's why I decided to give them a try. So far I believe this was the right move, but I will give them more serious listening I the coming weeks. Unfortunately I have to go on a business trip next week, so it will be something around end of January until I will have more experience with these amps. Maybe by then i will buy new cases to let them look more adult....

Thank you for the information I got from this thread. I will share my findings here. Later I will also take some pictures to show you what I build today.
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Old 10th January 2013, 11:05 PM   #5910
robbbby is offline robbbby  Canada
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Very nice. Any update on the standby boards for us regular folks?
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