Geek Pulse: Geek desktop DAC/AMP by Light Harmonics
Oct 31, 2013 at 12:42 PM Post #123 of 13,800
The ConceroHD/HP uses the mobile ES90182kM, just like the current prototype of the Pulse, and all reviews are very positive, maybe even rave!

I don't see it as a bad thing to keep using the same chip. It's all about how it is implemented. The ES9018 has been implemented in many DACs in many price points from $800 to $5000 and they don't sound the same because of their implementation. The new Pulse should sound better thanks to the use of bigger and higher performing parts that would allow LH to get the most out of it. And that's where the extra money over the Geek is going I believe.

I used to think that they should change to the desktop too, but the more I think about it, the more I tend to echo what others have said... I rather have the best a 90182KM DAC can be than a ES9018 gone wrong or with limitations that would prevent it from achieving its best performance.

NOW, If Larry Ho and the rest of the team manages to put the desktop es9018 in there and get better performance than they could ever get out of the ES90182KM given the design limitations... Bring it ON!!
 
Oct 31, 2013 at 12:45 PM Post #124 of 13,800
I do wonder how is it going to play DSD... Is it through ASIO or DoP?

I also think that one of the most important things here are solid drivers so we don't get problems when switching between different sample rates of PCM and DSD
 
Oct 31, 2013 at 3:14 PM Post #125 of 13,800
  Honestly, I hope they don't go with the larger desktop 9018.  It is very difficult to get to sound right and for a $500 ($249 for early backers) device this small, I would rather them use a chipset much better suited to the product and one that they already like the sound of.  There would have to be compromises somewhere.  

 
Whichever works best...
 
Oct 31, 2013 at 4:00 PM Post #126 of 13,800
Could someone elucidate the differences between the mobile and desktop chipsets?
I tend to agree that implementation is more important than the exact silicon chosen
 
Oct 31, 2013 at 4:13 PM Post #127 of 13,800
Could someone elucidate the differences between the mobile and desktop chipsets?
I tend to agree that implementation is more important than the exact silicon chosen


Here: http://esstech.com/index.php?p=products_DAC

In essence the mobile version is only stereo instead of 8ch and has a little less snr... But still pretty good. Other than that, less power consumption and smaller size. If there is something more, I missed it
 
Oct 31, 2013 at 5:40 PM Post #128 of 13,800
Here: http://esstech.com/index.php?p=products_DAC

In essence the mobile version is only stereo instead of 8ch and has a little less snr... But still pretty good. Other than that, less power consumption and smaller size. If there is something more, I missed it


Yes. The SNR difference is completely meaningless in the real world. There was a mention in the desktop chip about Time Domain Jitter Eliminator. Maybe that is a real difference.
 
Oct 31, 2013 at 8:03 PM Post #129 of 13,800
This thing is too cool.  I think I'll buy one for my daughter and when she doesn't use it I will for late night listening off the laptop instead of the Liquid Fire!
 
Oct 31, 2013 at 9:25 PM Post #130 of 13,800
  This thing is too cool.  I think I'll buy one for my daughter and when she doesn't use it I will for late night listening off the laptop instead of the Liquid Fire!

I would love to read a comparison of the two 
biggrin.gif

 
The Liquid Fire is my favorite headphone amp, but I haven't had a chance to direct compare it to the other amp I have really been impressed with recently.
 
Nov 1, 2013 at 8:53 AM Post #132 of 13,800
I am not an engineer, in another forum Larry Ho was talking that his system (Geek Pulse)  is full quad phased balanced. Any light of this?
 
Nov 1, 2013 at 9:14 AM Post #133 of 13,800
Set phasers to FULL QUAD BALANCED!!!

Sorry, I know that wasn't helpful.
 
Nov 1, 2013 at 9:18 AM Post #134 of 13,800
 
Yes. The SNR difference is completely meaningless in the real world. There was a mention in the desktop chip about Time Domain Jitter Eliminator. Maybe that is a real difference.

 
The ES9018-2KM also has the Time Domain Jitter Eliminator.  (check here: http://esstech.com/PDF/ES9018-2M%20PB%20Rev%200.8%20130619.pdf)
 
But I believe most of the recent DACs that use the Desktop ES9018 have that feature disabled and choose to use the chip in synchronous mode with an external clock from any of the asynchronous USB implementations.  People find that running the chip that way with a very low noise power supply are key in getting the best performance out of the chip.
 
Nov 3, 2013 at 1:57 AM Post #135 of 13,800
Realistically, how would you think this compares to the ODAC/O2 ? Definitely looks interesting.
 
I must say that the 'anti resonance feet' stretch goal looks a bit like voodoo
 

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