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AKG K812 Pro - Page 128

post #1906 of 2896
Quote:
Originally Posted by Sonido View Post
 

Has anyone tried the Magni with these? Looking for a cheap amp that pairs really well with these, like the Vali is to the HD800.

Don't own the K812, but the Magni has a 'warts n' all' presentation. A smidge brighter than neutral to my ears. Fantastic little amp but won't add any refinement. 

post #1907 of 2896

Objective2/Magni aren't about sounding good. They are about accurate signal reproduction.

post #1908 of 2896
Quote:
Originally Posted by Dreyka View Post
 

Objective2/Magni aren't about sounding good. They are about accurate signal reproduction.

 

Dreyka, how is the Benchmark DAC 1 rated these days in respect of accurate signal reproduction?

post #1909 of 2896
Quote: Kiats (Click to show)
Quote:
Originally Posted by Kiats View Post
 

 

Dreyka, how is the Benchmark DAC 1 rated these days in respect of accurate signal reproduction?

 

Rated very well. Objective/ODAC and Modi/Magni combo is much cheaper and achieves similar measurements. We are talking very small percentages of distortion that is well below what you could hear and orders of magnitude less than the distortion from the headphones.

post #1910 of 2896
Thanks, Dreyka! In that case, I'll hold on to mine. I had been wondering if it is still relevant today and if I should be in the market for a new one. :wink_face:
post #1911 of 2896
Quote:
Originally Posted by macbob713 View Post

Congrats, hope you enjoy them once you get used to your new rig, I look forward to your comparison with the 812 and the hd800. Enjoy everything!

 

As far as initial observations go I have a feeling that amp wise the K812 Pro is a demanding piece of work. Sure, it will provide some noise when connected to a random amp but to really get proper sound out of it you need a dedicated amp to drive it properly. When driving it using Classic I immediately discovered that these headphones have a tight bass/good lower register without sounding boomy. I have yet to try other AKG headphones (K712 Pro interests me) with the Classic but it certainly kicks the K812 Pro nicely.

 

The other very nice part about the K812 Pro is the fact that it resolves detail to a very revealing level, I don't feel like I'm missing anything there. The stereo image is very much to my liking too, I really like the way these headphones center the singer's voice so that you can hear it clearly and if there's a chorus where the sound is coming from left & right (example Lorde - Royals chorus part where the chorus goes "Royals" and "Ruler") the headphone really brings out those kinds of sounds. I don't know if I explained those correctly so forgive me here, maybe the more experienced members can explain this more accurately :)

 

As far as my expriences go I feel obligated to note that I use Daccord's crossfeed feature (high setting) which obviously has an effect. As far as tonal issues go I will have to listen a bit more and I also need to try out the other headphones too (HD800, K712 Pro,....) before going in there but I have a feeling that I will be pitting the K812 Pro against the HD800 in many levels. The good thing about the Meier Stack is that it is supposed to be a neutral sounding set so it should be a fair platform to do some comparisons.

post #1912 of 2896
it's been designed to be efficient. shouldn't need a highfalutin amp to drive it.
post #1913 of 2896
Quote: MaxiTK (Click to show)
Quote:
Originally Posted by MaxiTK View Post
 

 

As far as initial observations go I have a feeling that amp wise the K812 Pro is a demanding piece of work. Sure, it will provide some noise when connected to a random amp but to really get proper sound out of it you need a dedicated amp to drive it properly. When driving it using Classic I immediately discovered that these headphones have a tight bass/good lower register without sounding boomy. I have yet to try other AKG headphones (K712 Pro interests me) with the Classic but it certainly kicks the K812 Pro nicely.

 

The other very nice part about the K812 Pro is the fact that it resolves detail to a very revealing level, I don't feel like I'm missing anything there. The stereo image is very much to my liking too, I really like the way these headphones center the singer's voice so that you can hear it clearly and if there's a chorus where the sound is coming from left & right (example Lorde - Royals chorus part where the chorus goes "Royals" and "Ruler") the headphone really brings out those kinds of sounds. I don't know if I explained those correctly so forgive me here, maybe the more experienced members can explain this more accurately :)

 

As far as my expriences go I feel obligated to note that I use Daccord's crossfeed feature (high setting) which obviously has an effect. As far as tonal issues go I will have to listen a bit more and I also need to try out the other headphones too (HD800, K712 Pro,....) before going in there but I have a feeling that I will be pitting the K812 Pro against the HD800 in many levels. The good thing about the Meier Stack is that it is supposed to be a neutral sounding set so it should be a fair platform to do some comparisons

 

AKG K812 = 95.56dB/mW

 

dB/mW = dB/V - 30 + 10*log(R)

 

95.56 = 110 - 30 + 10*log(36)


dB/V is the sensitivity in dB (SPL) at 1 Vrms of voltage into impedance R, 110 dB/V into 36 ohms in this case
R is the nominal impedance, 36 ohms in this case
dB/mW is the sensitivity in dB (SPL) at 0.001 watt of power (that is 1 milliwatt)
log is the logarithm base 10

 

So they are reasonably sensitive but it is more a factor of current than voltage. You certainly won't be needing ridiculously powerful amplifiers.


Edited by Dreyka - 3/11/14 at 3:13am
post #1914 of 2896
Quote:
Originally Posted by Dreyka View Post

Rated very well. Objective/ODAC and Modi/Magni combo is much cheaper and achieves similar measurements. We are talking very small percentages of distortion that is well below what you could hear and orders of magnitude less than the distortion from the headphones.

I think we have full measurements for the former, but not the latter.
post #1915 of 2896

Some measure from the engineer of Yulong  audio.

 

Use B&K artificial ear, IEC standard.

 

CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 80


Edited by donthuang - 3/11/14 at 6:08am
post #1916 of 2896
MacBob,

The DHC Molecue SE Fusion has arrived. I'll be traveling this week but I'll listen in greater detail when I get back. What I will say is that the hybrid does not suffer from coherence issues as some do.

What I hear is is the smoothness and clarity of silver balanced by the slight warmth and organic bass impact of the copper.
[IMG][IMG]
post #1917 of 2896
post #1918 of 2896
Quote:
Originally Posted by Dreyka View Post
 

 

AKG K812 = 95.56dB/mW

 

dB/mW = dB/V - 30 + 10*log(R)

 

95.56 = 110 - 30 + 10*log(36)


dB/V is the sensitivity in dB (SPL) at 1 Vrms of voltage into impedance R, 110 dB/V into 36 ohms in this case
R is the nominal impedance, 36 ohms in this case
dB/mW is the sensitivity in dB (SPL) at 0.001 watt of power (that is 1 milliwatt)
log is the logarithm base 10

 

So they are reasonably sensitive but it is more a factor of current than voltage. You certainly won't be needing ridiculously powerful amplifiers.


Maybe a bit poor choice of words originally from me, I meant that in order to get the full benefits of this headphone you cannot drive it using any sort of amplifier, a dedicated headphone amp is needed there in my opinion. Sure you can hook it up to a portable player, tablet, phone but most likely you won't be getting the sound which you deserve out of the headphone. I made the mistake of trying to connect it to an AV-ampliefier and wondered what happened to the clarity, lower register, etc. Sennheiser HD800 had also these effects but to a much lesser degree, with the K812 Pro it felt like it was a totally different (worse) headphone.

post #1919 of 2896

Complete opposite to me. 

post #1920 of 2896
Quote:
Originally Posted by donthuang View Post
 

Some measure from the engineer of Yulong  audio.

 

Use B&K artificial ear, IEC standard.

 

CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 80

The K812 measurement is quite accurate if you cross-check it with other sources of measurement. Linear extension until the broad hump at 3.5kHz, null at 4.8kHz, broad peak at 8 and narrow one at 10. That seems to be the consistent signature in the upper end.

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