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Hifiman releases EF400 AiO DAC-Amp

Snoopy

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Question what's the final stap? It seems to happen after pushed to source? Confused.
The Cxn V2 has a DAC that upsamples everything to 384khz.

So if I feed it 44.1khz it will upsample it to 384khz.
Or in that scenario I use roon. And I tell roon to do a bunch of stuff before sending the signal to the DAC.
 

Snoopy

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Oh and Roon knows this. Ok, I see.
Yeah.

I should get my Hifiman ef400 tomorrow or Wednesday.

Maybe someone else could connect roon or audirvana to it. 176khz seems like a odd sample rate.


Because multiple site say the Himalaya DAC supports 24bit 768khz.

That one previous Hifiman customer service quote mentions 32bit 384khz.
 

Bow_Wazoo

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Can someone explain to me why two watts per channel were measured there?
And especially what is written there about THD+N<1% - THD+N<10%

BAL-THDN-Ratio-vs-Measured-Level.jpg


 

Snoopy

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If you want clean power up to 2 watt you get 1% distortion.

If you use 4 watt or more distortion goes up to 10%
 

Bow_Wazoo

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I don't understand.
According to his measurement, the amplifier clips at 68 ohms, at about 2 watts?!
 

Jimbob54

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I don't understand.
According to his measurement, the amplifier clips at 68 ohms, at about 2 watts?!
The translation to english by google perhaps loses some of the finer points but its as @Snoopy says. You will get up to 2w of low distortion power @68ohm from the balanced output in high gain. After that, distortion sky rockets as it clips. How audible it is at any point past 2w is down to what you are playing, how good your hearing and equipment are.

What bit dont you understand? (Dont ask me what or who green sandalwood is!)
 

Bow_Wazoo

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To what extent can we calculate how much power I'm asking the EF400 to deliver with the volume knob turned all the way up?
Headphone is the HE6SE V2.
 

Jimbob54

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To what extent can we calculate how much power I'm asking the EF400 to deliver with the volume knob turned all the way up?
Headphone is the HE6SE V2.
Tough one. Impossible to say with music without measuring the signal level going in digitally.

@solderdude can usually work out what it might be theoretically with a full strength signal.
 

solderdude

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13V in 60hm for balanced operation distortion free = 2.8W.
HE6SE is 90dB/V this means comfortable loud with 112dB SPL peaks in music should be loud enough for anything but ear splitting levels.
In SE mode = 7V = 0.8W and thus 107dB peak SPL.
 

Bow_Wazoo

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Anyway, there are several albums mastered at usual volume where the EF400 is not loud enough for me. Preamp is set to -7dB (because of EQ).
 

ObjectiveSubjectivist

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Anyway, there are several albums mastered at usual volume where the EF400 is not loud enough for me. Preamp is set to -7dB (because of EQ).
Can you please share album names?

It seems like you are listening at very loud levels.
Think twice about your listening habits. I believe that you want still enjoy music when you are older?
Now I cannot see this happening. Sorry
 

Bow_Wazoo

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For example, on this song, from Move D's album Songs from Beehive, my spl meter shows 94dB, when I turn the volume knob all the way up.
Yes, that's loud.
But with EDM, I'd like a little more.

Unbenannujjjjt.JPG


And now about my hearing.
I'm 43 years old, and I get my hearing checked regularly at work.
So far my values are very good, and that's saying something, after a youth full of techno parties.
 

solderdude

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Snoopy

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Some people use subwoofers with headphone setups. Maybe U need to try that
 
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Bow_Wazoo

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Yes, usually the neighbors have no problem with the mids and highs :D
 
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