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Old 18th January 2013, 12:50 PM   #6071
Julf is offline Julf  Europe
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Quote:
Originally Posted by ds23man View Post
http://www.hypex.nl/component/weblin...datasheet.html

See para 9.2., THD+N vs power...
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Old 18th January 2013, 01:06 PM   #6072
ds23man is offline ds23man  Netherlands
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Quote:
Originally Posted by Julf View Post
If you use a 113db driver, the ncore will always operate at the left side of the THD+N vs power diagram. The ncore has the lowest THD in the range from 10-50 watt. So it is better to do some power soaking after the amp!!!!!
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Old 18th January 2013, 01:10 PM   #6073
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THD+Noise will be lowest in the 10-50 W range, but below 10 W there is just noise, and really no distortion. In reality, THD will be lower at lower power outputs.
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Old 18th January 2013, 01:19 PM   #6074
Julf is offline Julf  Europe
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Originally Posted by StigErik View Post
THD+Noise will be lowest in the 10-50 W range, but below 10 W there is just noise, and really no distortion. In reality, THD will be lower at lower power outputs.
Exactly. And not only that - it is also somewhat funny to use an extremely efficient amp, and then burn off a fair bit of power in a resistor - when the result can easily be accomplished by reducing the gain.

Can we please put an end to this useless debate by agreeing to the fact that lowering the gain makes sense for some users, while others might choose to go for other solutions?
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Old 18th January 2013, 01:33 PM   #6075
ds23man is offline ds23man  Netherlands
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According to Bruno it does not do anything with the soundquality:

"The amp certainly isn't going to get worse if you decrease gain (other than SNR it's not going to get better either). "
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Old 18th January 2013, 02:12 PM   #6076
Julf is offline Julf  Europe
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Quote:
Originally Posted by ds23man View Post
According to Bruno it does not do anything with the soundquality:

"The amp certainly isn't going to get worse if you decrease gain (other than SNR it's not going to get better either). "
Just to pick nits, I think it is not true to say "it does not do anything with the soundquality", as SNR will improve, and nothing else will get worse.
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Old 18th January 2013, 02:36 PM   #6077
ds23man is offline ds23man  Netherlands
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Quote:
Originally Posted by Julf View Post
Just to pick nits, I think it is not true to say "it does not do anything with the soundquality", as SNR will improve, and nothing else will get worse.
Better start a debate with Bruno then, it are his words and he designed this amp.
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Old 18th January 2013, 02:41 PM   #6078
Julf is offline Julf  Europe
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Originally Posted by ds23man View Post
Better start a debate with Bruno then, it are his words and he designed this amp.
I agree with your quote from Bruno, but not with your conclusion/summary.
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Old 18th January 2013, 02:42 PM   #6079
akasha is offline akasha  Denmark
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Quote:
Originally Posted by Esperado View Post
Your number is a little exaggerated :-)
.
How sad it might be , its true none the less, direct radiator loudspeakers have a efficiency of around 1%

it puts a few things in perspective
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Old 18th January 2013, 02:52 PM   #6080
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Originally Posted by akasha View Post
How sad it might be , its true none the less, direct radiator loudspeakers have a efficiency of around 1%

it puts a few things in perspective
And that is sadly primarily the case for PA drivers.

So called hi-end low distortion HIFI drivers typically are a magnitude or two less efficient...

No DSP or other fancy-pancy additives can unfortunately make up for that bottleneck.
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