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Old 29th January 2013, 11:16 AM   #6231
Julf is offline Julf  Europe
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Quote:
Originally Posted by 3lviz View Post
By the way. It's little surprising that, it's already page 623 and one+ year of nCore availability, and still no comprehensive DIY measurements of nCore performance. Lot of talk, lot of opinions, no data. If there is and i have missed the message, could you point me to it.
So far I haven't had reason to doubt the measurements and specifications hypex has published. What specific measurements are you interested in - I might find time to dig out my spectrum analyser at some point...
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Old 29th January 2013, 11:17 AM   #6232
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why do you need independent measurements?
decent measurements can be done with a pro sound card, their quality is not very far from that of a dedicated measurement system.
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Old 29th January 2013, 11:19 AM   #6233
Julf is offline Julf  Europe
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How many DIY guys have an Audio Precision analyzer you think?
My old Agilent wide-band one is pretty good for HF/RF work. Not good enough in terms of low noise to compare to something like the AP...
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Old 29th January 2013, 11:39 AM   #6234
3lviz is offline 3lviz  Finland
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Originally Posted by StigErik View Post
How many DIY guys have an Audio Precision analyzer you think?
Well, looking at some other threads, some people seem to have access to (work, home, or otherwise) some pretty good measurement equipment.

Quote:
Originally Posted by StigErik View Post
So far I haven't had reason to doubt the measurements and specifications hypex has published. What specific measurements are you interested in - I might find time to dig out my spectrum analyser at some point...
I have no reason to doubt Hypex either. But, well, for instance, how well does nCore do with 1 ohm load? According to datasheet nCore should be able to handle it, but how much juice is coming out is a mystery. In general a power cube analysis would be great.
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Old 29th January 2013, 11:42 AM   #6235
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Yes - 1 ohm power output should be very easy to measure... but how relevant is that?
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Old 29th January 2013, 11:51 AM   #6236
3lviz is offline 3lviz  Finland
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Just for the interest and enthusiasm . Since i am pretty much the only one with nCore in our local hifi community, i get questions like these: "how well would it do with tough load like my <insert some insane compilation of speakers>".
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Old 29th January 2013, 12:07 PM   #6237
Julf is offline Julf  Europe
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for instance, how well does nCore do with 1 ohm load? According to datasheet nCore should be able to handle it, but how much juice is coming out is a mystery.
My bet is on the nCore producing 575 W into 1 ohm, as the current limit kicks in at 24 A...
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Old 29th January 2013, 12:28 PM   #6238
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Originally Posted by 3lviz View Post
Just for the interest and enthusiasm . Since i am pretty much the only one with nCore in our local hifi community, i get questions like these: "how well would it do with tough load like my <insert some insane compilation of speakers>".
Yeah, its a "mine is bigger than yours" type of discussion...
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Old 29th January 2013, 12:46 PM   #6239
Julf is offline Julf  Europe
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i get questions like these: "how well would it do with tough load like my <insert some insane compilation of speakers>".
And the answer to that is "the current limiter kicks in at 23-26 A".

In the "Recommeded operating conditions" minimum load impedance is specified as 1 ohm - so anything above that is clearly OK. Below that you are operating out of spec
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Old 29th January 2013, 02:40 PM   #6240
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My bet is on the nCore producing 575 W into 1 ohm, as the current limit kicks in at 24 A...
That would be peak. RMS should then be half -not that it really matters anyway. Voltage swing should be relative to peak current and thus current capabilities as Julf say.
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