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-   -   check your head, this is what audiophile amps do (http://www.diyaudio.com/forums/class-d/216069-check-your-head-what-audiophile-amps-do.html)

xmaxxx 13th July 2012 07:41 AM

check your head, this is what audiophile amps do
 
1 Attachment(s)
Crown reference, why did they stop making you?

theAnonymous1 13th July 2012 10:07 AM

Not really. You want lower distortion at lower power where it matters. You aren't going to notice the difference between 0.1% and 0.001% at 1kW.

StigErik 13th July 2012 10:10 AM

Quote:

Originally Posted by theAnonymous1 (Post 3090715)
Not really. You want lower distortion at lower power where it matters. You aren't going to notice the difference between 0.1% and 0.001% at 1kW.

The crown has it. The only reason THD+N is rising at lower powers is that the noise floor is constant, meaning there is no distorstion, only noise to be measured.

theAnonymous1 13th July 2012 10:25 AM

Quote:

Originally Posted by StigErik (Post 3090716)
The crown has it. The only reason THD+N is rising at lower powers is that the noise floor is constant, meaning there is no distorstion, only noise to be measured.

That's even worse, no?

StigErik 13th July 2012 10:30 AM

No it itsn't. The noise floor of the Crown is very low, so low you cant hear the background noise through your speakers. And the distortion is even lower than that. I think thats pretty good. :)

chris661 13th July 2012 10:40 AM

If the distortion at 0.1w is negligible, the noise floor is ~35dB down.

So if your speakers do 90dB @1w, with ~0.1w input, that's 80dB. So 45dB of noise?
Pretty much falls into the noise floor of a typical room.

StigErik 13th July 2012 10:45 AM

The numbers are voltage related, so noise at 0,1W is -70 dB.

xmaxxx 13th July 2012 03:08 PM

1 Attachment(s)
No I am having fun messing with these inexpensive class-D or T amps,
I keep reading "audiophile" quality with the distortion figures, I thought
it is a little silly, but still not fair to test them against $5k amps! what
are people finding with The L25D boards? they seem like a bargin!
Oh and the crown is very quite, even with enough gain to produce
a 800 watt 50hz sine wave the rest of the spectrum is around
-100db!


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