Geek Pulse: Geek desktop DAC/AMP by Light Harmonics

Aug 2, 2015 at 2:46 AM Post #8,671 of 13,808
As I understand, the toslink/spdif inputs depend on the clock coming from the source. So the femtos are not working their magic. Still, it should not sound like 64kbps mp3 files.... I would open a service ticket

 
The SPDIF source was my Fiio X5, which, while not top of the line, should definitely be of decent quality. Moreover, on the concero HD which I previously had, the coaxial input from my X5 actually sounded better than the USB input from the computer. 
 
I was astounded by the poor quality of the spdif input on my unit, it was far far worse than listening straight out of the X5. Hopefully with the replacement the USB input would perform better too, for the asking price (MSRP) what I'm hearing of the xfi now is severely overpriced. I've opened a ticket and will update when the new unit comes in :)
 
Aug 2, 2015 at 4:12 AM Post #8,673 of 13,808
wait, so the clocks only work for USB? does this mean no FTM from toslink? 
 
Aug 2, 2015 at 7:21 AM Post #8,674 of 13,808
The SPDIF source was my Fiio X5, which, while not top of the line, should definitely be of decent quality. Moreover, on the concero HD which I previously had, the coaxial input from my X5 actually sounded better than the USB input from the computer. 

I was astounded by the poor quality of the spdif input on my unit, it was far far worse than listening straight out of the X5. Hopefully with the replacement the USB input would perform better too, for the asking price (MSRP) what I'm hearing of the xfi now is severely overpriced. I've opened a ticket and will update when the new unit comes in :)

You are correct, your source should do a fine job. That's why I suggested you open a ticket. Your spdif would have to be really bad with jitter in order to have it affect the sound as much as you mention.
 
Aug 2, 2015 at 7:25 AM Post #8,675 of 13,808
Even spdif inputs are supposed to go through LHLABS magical 2L buffer/jitter reduction feature.



wait, so the clocks only work for USB? does this mean no FTM from toslink? 


Spdif/toslink are synchronous inputs. They are slave to the signal input clock and don't reclock the signal. So even if the signal is buffered and the femtos are still in line, they play following the input source's clock. This is as far as I know.

Still, even using spdif/toslink, you shouldnt have a terrible degradation of sound quality by using those inputs.... They should be just fine.
 
Aug 2, 2015 at 11:22 AM Post #8,678 of 13,808
The SPDIF source was my Fiio X5, which, while not top of the line, should definitely be of decent quality. Moreover, on the concero HD which I previously had, the coaxial input from my X5 actually sounded better than the USB input from the computer. 

I was astounded by the poor quality of the spdif input on my unit, it was far far worse than listening straight out of the X5. Hopefully with the replacement the USB input would perform better too, for the asking price (MSRP) what I'm hearing of the xfi now is severely overpriced. I've opened a ticket and will update when the new unit comes in :)


With all the hundreds of units shipped, it's not encouraging to see comments about line out quality being inferior etcetera. i know everybody here is an enthusiast and would've thought there would be more positive feedback on the product. After all this time, I can honestly say I am not having much confidence in the product now despite the supposedly quality components. Backing 3 infinities + LPS isn't exactly pocket change and for this thing to sound worse than the X5 is not acceptable. Looks like it's time to post this stuff up for sale when I actually get it and try to get some of what I paid back. First and last time I back crowd funded anything.
 
Aug 2, 2015 at 11:31 AM Post #8,679 of 13,808
production update.. I think it's new?
http://lhlabs.com/downloads/updates/dianas_production_progress_chart.pdf
 
Aug 2, 2015 at 11:35 AM Post #8,680 of 13,808
Aug 2, 2015 at 12:37 PM Post #8,682 of 13,808
With all the hundreds of units shipped, it's not encouraging to see comments about line out quality being inferior etcetera. i know everybody here is an enthusiast and would've thought there would be more positive feedback on the product. After all this time, I can honestly say I am not having much confidence in the product now despite the supposedly quality components. Backing 3 infinities + LPS isn't exactly pocket change and for this thing to sound worse than the X5 is not acceptable. Looks like it's time to post this stuff up for sale when I actually get it and try to get some of what I paid back. First and last time I back crowd funded anything.

 


To be clear, it is not an issue with the line out but rather, the inputs. The spdif and coax inputs are extremely poor, 64mbps mp3 files kind of poor to me. The USB, while much much better, definitely doesn't sound like 2.4k USD.

Having said that, I strongly believe my unit to be faulty as it has been noted by a couple of other forum members that the other inputs are very compareable to the usb input. Comments from friends whom I trust too seem to indicate a higher level of resolution than I have heard from my unit. As such, I feel that my unit might really just be a dud and I am keeping my fingers crossed, hoping that things will get better when I get a replacement.

To me, going from a portable (x5 + pure 2) rig to a desktop rig should really blow my socks off. The hugo does that. My xfi did not, sadly. I am hoping that this will change :)
 
Aug 2, 2015 at 12:55 PM Post #8,683 of 13,808
  yep...looks like.
 
Hmm....I expected that the ViDac would be on this list...


Exactly, both the Vi DAC and the Wave should at least be listed, based on previous statements made by LH Labs.
 
Wave was supposed to start shipping in Q4, and Vi DAC in September, with Vi DAC Tube also in Q4.
 
Or not.
 
The original IGG (read: total BS) estimates were Vi DAC in April 2015, and Wave in July 2015.
 
Aug 2, 2015 at 1:03 PM Post #8,684 of 13,808
With all the hundreds of units shipped, it's not encouraging to see comments about line out quality being inferior etcetera. i know everybody here is an enthusiast and would've thought there would be more positive feedback on the product. After all this time, I can honestly say I am not having much confidence in the product now despite the supposedly quality components. Backing 3 infinities + LPS isn't exactly pocket change and for this thing to sound worse than the X5 is not acceptable. Looks like it's time to post this stuff up for sale when I actually get it and try to get some of what I paid back. First and last time I back crowd funded anything.

 


To be clear, it is not an issue with the line out but rather, the inputs. The spdif and coax inputs are extremely poor, 64mbps mp3 files kind of poor to me. The USB, while much much better, definitely doesn't sound like 2.4k USD.

Having said that, I strongly believe my unit to be faulty as it has been noted by a couple of other forum members that the other inputs are very compareable to the usb input. Comments from friends whom I trust too seem to indicate a higher level of resolution than I have heard from my unit. As such, I feel that my unit might really just be a dud and I am keeping my fingers crossed, hoping that things will get better when I get a replacement.

To me, going from a portable (x5 + pure 2) rig to a desktop rig should really blow my socks off. The hugo does that. My xfi did not, sadly. I am hoping that this will change :)


Agisthos posted about the lineouts being inferior(surprise to me) along with soundstage issues. Knowing that the xfi can't even compare to the x5 (absolutely no offense to the x5) is a joke since they claim every unit supposedly goes through a full battery of tests before shipping. i only have myself to blame for trusting them because they came up with the davinci. I'll be posting everything for sale once they actually ship me the rest of the stuff since I want to wash my hands (someone on canuckaudiomart made the same comments and did the same thing) of this now after seeing these real world comments.
 
Aug 2, 2015 at 1:07 PM Post #8,685 of 13,808
Exactly, both the Vi DAC and the Wave should at least be listed, based on previous statements made by LH Labs.

Wave was supposed to start shipping in Q4, and Vi DAC in September, with Vi DAC Tube also in Q4.

Or not.

The original IGG (read: total BS) estimates were Vi DAC in April 2015, and Wave in July 2015.


Mikey, marflao etc. I really admire you guys for still having expectations and trust in what LH posts. Honestly, hats off to you guys.
 

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