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post #1681 of 1854
I'm rebuilding my full size headphone rig and am currently running an E17 as Dac and amp for my T1. My Bottlehead crack is on order and should be shipping soon. I've just finished reading all 112 pages of this thread and while the question was asked 2 or 3 times no one ever answered it.. So here goes...

I'm looking between the UberBifrost, Concero, and the Dac-Itx. Does anyone have any experience with the T1 and Bottlehead Crack with any of these Dac's?

My old rig was the 1st gen Bifrost, Valhalla, and the HD650. This time I really wanted to try building the Crack and was looking for "ideal" headphones and Dac to go with it.

Thanks
post #1682 of 1854

dear folks

a silly question (maybe)

if I play dsd files trough concero hd used a usb/spdif bridge to a dac 24/192

Do I downsample the files?

post #1683 of 1854

Hello

 

 

I have been doing a lot of reading concerning why people use a USB-S/PDIF converter in line between the USB connection between a computer and a DAC which I guess is due to the clock speed, jitter, and timing issues. I know very LITTLE about these issues. 

 

My current set up is the following: Macbook - USB cable in - Resonessence Labs  Concero HD - RCA connectors out - Burson Soloist in via the pre-amp - headphones (Audeze LCD-3)

 

Mark Mallinson at Resonessence Labs has been quoted the following: 

 

Quote:
"We spent a lot of time making sure that speed differences between the host PC’s reference clock and the high quality low phase noise reference of the CONCERO (and INVICTA) didn’t cause issues. The async code needs to be able to handle when the host PC is both too fast and too slow. We made the CONCERO and INVICTA code work for up to +-4000ppm. To allow for this large difference we needed a custom solution with larger data buffers. Having these buffers also makes our solution less likely to dropout when there are other USB devices connected to the host PC.”, says RL mainman Mark Mallinson."

 

Based on this statement, it sounds like RL did a good job with USB implementation such that it sounds like I would not need a USB-S/PDIF converter between my Macbook pro and my Resonessence Labs  Concero HD. Does that sound correct?

 

Also, would a USB power supply unit (PSU) (like the iFi iUSBPower Power Supply) be something to consider placing in line between the Macbook and the RL Concero HD ? I guess this would provide external power to the USB connection and thus improve the SQ?

 

Thanks so much

 

Joe

 

PS. Is anyone using a USB-S/PDIF converter between their computer and the Concero HD? If so why?

post #1684 of 1854
Quote:
Originally Posted by montanari View Post
 

dear folks

a silly question (maybe)

if I play dsd files trough concero hd used a usb/spdif bridge to a dac 24/192

Do I downsample the files?

By my understanding, the Concero just passes the DSD (DoP) stream to the S/PDIF output, it does not convert it to PCM. This means if you're using the Concero as a USB-S/PDIF convertor, you still need a DSD DAC. If what you're asking is the opposite, using a USB to S/PDIF interface to go into the Concero, this should also work, but whatever the case... DoP for DSD64 is streamed at 176.4/24. This must be exact.

post #1685 of 1854
Quote:
Originally Posted by brhfl View Post
 If what you're asking is the opposite, using a USB to S/PDIF interface to go into the Concero, this should also work, but whatever the case... DoP for DSD64 is streamed at 176.4/24. This must be exact.

 

Hi Thanks for the response. I am using the Concero HD as a DAC only (not a USB-S/PDIF converter). And,  DSD is not an issue for me since I am using High res PCM. So, yes, I am asking the latter in your response above. But my question is: do I need a USB-S/PDIF converter since the USB implementation in Concero HD seems have done correctly?

 

Thanks

Joe

post #1686 of 1854
Quote:
Originally Posted by jmm007 View Post
 

[...]

 

Based on this statement, it sounds like RL did a good job with USB implementation such that it sounds like I would not need a USB-S/PDIF converter between my Macbook pro and my Resonessence Labs  Concero HD. Does that sound correct?

 

Also, would a USB power supply unit (PSU) (like the iFi iUSBPower Power Supply) be something to consider placing in line between the Macbook and the RL Concero HD ? I guess this would provide external power to the USB connection and thus improve the SQ?

 

Thanks so much

 

Joe

 

PS. Is anyone using a USB-S/PDIF converter between their computer and the Concero HD? If so why?

Part of why I love the Concero is its versatility... It's a great DAC, and a great USB-S/PDIF converter. I used a Halide Bridge for a long time, when I was using a DAC without a USB input, and sort of figured I'd hang onto it just in case... But the Concero's converter is great, and I don't really feel that need anymore. I haven't personally tried any power upgrades on mine, though I know some are doing as described.

post #1687 of 1854
IIRC,

Having read reviews on Concero HD before my purchase, a couple folks tried cleaner USB power but with limited or no sonic improvement.

I feel the HD has enough smart tech that Resonessence gurus clean up USB power good enough inside the unit as is.

And with Mac limiting optical output to 24/96 I solely rely on USB for audio connections.
Edited by jexby - 3/27/14 at 8:34am
post #1688 of 1854
Quote:
Originally Posted by Serenitty View Post

I'm rebuilding my full size headphone rig and am currently running an E17 as Dac and amp for my T1. My Bottlehead crack is on order and should be shipping soon. I've just finished reading all 112 pages of this thread and while the question was asked 2 or 3 times no one ever answered it.. So here goes...

I'm looking between the UberBifrost, Concero, and the Dac-Itx. Does anyone have any experience with the T1 and Bottlehead Crack with any of these Dac's?

My old rig was the 1st gen Bifrost, Valhalla, and the HD650. This time I really wanted to try building the Crack and was looking for "ideal" headphones and Dac to go with it.

Thanks

The closest I can come to helping:

 

I fed a Bottlehead S.E.X. 2.1 with a regular Concero and thought it was an excellent pairing.  I thought this was a better sounding rig that a Bifrost (regular)/Lyr (upgraded tubes), that I compared it with (with HE-500 and LCD2.2).  I couldn't find a headphone that didn't sound good with the combo.  Headphones tested:  HD650, HD800, D2000, D5000, D7000, TH900, T1, HE-5LE, HE-500, HE-6, LCD2.2, and T50RP.  The Concero was a better pairing than a Nuforce HDP, Modi, and ODAC.

 

So not a real answer, but maybe a few data points to help.

post #1689 of 1854
Quote:
Originally Posted by jexby View Post

IIRC,

Having read reviews on Concero HD before my purchase, a couple folks tried cleaner USB power but with limited or no sonic improvement.

I feel the HD has enough smart tech that Resonessence gurus clean up USB power good enough inside the unit as is.

And with Mac limiting optical output to 24/96 I solely rely on USB for audio connections.

 

 

Thanks, That is exactly what I was inquiring about. And along the same lines with your comment about RL doing a good job on clean power,  I would assume, similarly, they did the  same with their implementation of there "async code" to minimize  the clock speed, jitter, timing etc issues seen in some USB-DAC connections and thus avoiding the need to use an in-line USB-S/PDIF converter.

 

Your comment about the Mac's limitation on the optical output is one I did not even know. Thanks

 

Joe


Edited by jmm007 - 3/27/14 at 9:42am
post #1690 of 1854
Quote:
Originally Posted by jmm007 View Post

Hello

 



 



I have been doing a lot of reading concerning why people use a USB-S/PDIF converter in line between the USB connection between a computer and a DAC which I guess is due to the clock speed, jitter, and timing issues. I know very LITTLE about these issues. 

 



My current set up is the following: Macbook - USB cable in - Resonessence Labs  Concero HD - RCA connectors out - Burson Soloist in via the pre-amp - headphones (Audeze LCD-3)

 



Mark Mallinson at Resonessence Labs has been quoted the following: 

 



 



Based on this statement, it sounds like RL did a good job with USB implementation such that it sounds like I would not need a USB-S/PDIF converter between my Macbook pro and my Resonessence Labs  Concero HD. Does that sound correct?

 



Also, would a USB power supply unit (PSU) (like the iFi iUSBPower Power Supply) be something to consider placing in line between the Macbook and the RL Concero HD ? I guess this would provide external power to the USB connection and thus improve the SQ?

 



Thanks so much

 



Joe

PS. Is anyone using a USB-S/PDIF converter between their computer and the Concero HD? If so why?

The concero hd doesn't improve with a converter
The sound is very clean and without noise
I have an aqvox power supply and right now is in its box cause make no difference with or without
Some friends tried the ifi without hearing no improvement (they said just a little but could be psychology..)
You built a great system not far from the conductor
If I have to complaint something about the concero it's a bit of lacking in the bass section
post #1691 of 1854
Quote:
Originally Posted by brhfl View Post

By my understanding, the Concero just passes the DSD (DoP) stream to the S/PDIF output, it does not convert it to PCM. This means if you're using the Concero as a USB-S/PDIF convertor, you still need a DSD DAC. If what you're asking is the opposite, using a USB to S/PDIF interface to go into the Concero, this should also work, but whatever the case... DoP for DSD64 is streamed at 176.4/24. This must be exact.
I use the concero as a spdif converter to the Burson (24/192 dac inbuilt) with jriver settled according to resonnence labs dsd over PCM
Playing dsd it sounds
Connected as a pure dac to the line in of the conductor it sounds pretty the same
...
post #1692 of 1854
Quote:
Originally Posted by FraGGleR View Post
 

The closest I can come to helping:

 

I fed a Bottlehead S.E.X. 2.1 with a regular Concero and thought it was an excellent pairing.  I thought this was a better sounding rig that a Bifrost (regular)/Lyr (upgraded tubes), that I compared it with (with HE-500 and LCD2.2).  I couldn't find a headphone that didn't sound good with the combo.  Headphones tested:  HD650, HD800, D2000, D5000, D7000, TH900, T1, HE-5LE, HE-500, HE-6, LCD2.2, and T50RP.  The Concero was a better pairing than a Nuforce HDP, Modi, and ODAC.

 

So not a real answer, but maybe a few data points to help.


Thanks, every bit helps.  I've got my tracking number now so I'm really looking forward to building the Crack.  I expect it will sound great with the T1's even with the E17 as a dac.  Heck the T1's sound great with just the E17 as amp and DAC.   So I've still got time to narrow down a DAC upgrade.  I'm still torn between the Uber-Bifrost and the Concero, I think the HD version is probably overkill (as would be the Gungnir) and the Dac-Itx is mainly in consideration on price and local availability.

 

Thanks

post #1693 of 1854

@ jmm07 , never combine the iUSB with the Concero HD, go few pages back and you will see my quote for the iUSB + Bifrost Uper, same case made me sell the Concero thinking it was dry on the mid range and got SQ issues. 

post #1694 of 1854
Quote:
Originally Posted by Shini44 View Post
 

@ jmm07 , never combine the iUSB with the Concero HD, go few pages back and you will see my quote for the iUSB + Bifrost Uper, same case made me sell the Concero thinking it was dry on the mid range and got SQ issues. 

 

Thanks so much for the tip. I will go back and read it. 

post #1695 of 1854
Quote:
Originally Posted by jmm007 View Post

Thanks so much for the tip. I will go back and read it. 
Let it go!
It make no differences, or just a little
No way it's sound worst
Sorry I had to tell it, I can't hear this stuff..
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