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Old 21st June 2011, 03:18 PM   #591
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Actually, since the B-III can be configured as up to 8-channels, you can get by with a single B-III (without the benefits of the combined channels, of course).
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Old 21st June 2011, 03:26 PM   #592
exa065 is offline exa065  Canada
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Originally Posted by BrianDonegan View Post
Actually, since the B-III can be configured as up to 8-channels, you can get by with a single B-III (without the benefits of the combined channels, of course).
Hi Brian, Is the B-III available now?
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Old 21st June 2011, 03:31 PM   #593
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Hi Brian, Is the B-III available now?
Not yet, but the B-II is no longer available. I think we will start pre-orders in a couple weeks.
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Old 21st June 2011, 03:40 PM   #594
qusp is offline qusp  Australia
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Originally Posted by BrianDonegan View Post
Actually, since the B-III can be configured as up to 8-channels, you can get by with a single B-III (without the benefits of the combined channels, of course).
so its a matter of feeding the 8 x dsd pins discretely, or the 4 x stereo pcm channels yes? (aside from spdif of course)
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Old 21st June 2011, 03:46 PM   #595
exa065 is offline exa065  Canada
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Not yet, but the B-II is no longer available. I think we will start pre-orders in a couple weeks.
Could you share with us how DSD can be interfaced with Buffalo-III?
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Old 21st June 2011, 04:01 PM   #596
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Could you share with us how DSD can be interfaced with Buffalo-III?
Just supply the DSD Data_clock and DSD data lines to the input header. Termination is already there.

If you are using fewer than 8-channels, you can join DSD inputs via jumpers under the board as needed. Same for PCM input.
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Old 21st June 2011, 05:52 PM   #597
theob is offline theob  United States
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Originally Posted by exa065 View Post
Here is your minimal configuration:
  1. Multichannel I2S source: Juli@ or exaU2i
  2. Two Buffalo II DACs for a two-way system.
  3. Software crossover to split 2 channel source into four output channels
  4. Player or VST host, or the combination of the two to host the crossover
Do you have any specific questions on any of these items?
No I'm ok now. I use cplay which can use a vst. Just wanted to confirm that I would need the exaU21 and another Buf32s. Thanks
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Old 24th June 2011, 06:17 PM   #598
theob is offline theob  United States
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The pictures shows where the USB power trace from the USB connector are cut, and where the new 5 volt are connected to supply the USB parts.
The quality of the pictures are not the best, but they will have to do.
On the exaU2I there are also two other places I have cut traces.
The PCB trace going from the 5 volt (USB) to the 3.3 and 1.2 volt onboard regulators and the PCB trace close to the 1.2 volt regulator and reconnecting it to be supplied from the 3.3 volt.
I am very interested in learning more about your exa tweaks. I cannot tell where you cut the traces on the exa board (from your pics)
so that you could supply LiFepo4 power to it. Can you say more about it please? I have a juli@ powered by 3 LiFepo4's and and a Buf32s powered by 3 LiFePo4's (all into the digital ps) so if I get an Exa I could do this too. Based on this thread I am very interested in the ExaU21 for a straight Juli@ replacement then to use eventually in conjunction with a digital crossover.
I run cplay/cmp.
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Old 25th June 2011, 08:23 AM   #599
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I am very interested in learning more about your exa tweaks. I cannot tell where you cut the traces on the exa board (from your pics)
so that you could supply LiFepo4 power to it. Can you say more about it please? I have a juli@ powered by 3 LiFepo4's and and a Buf32s powered by 3 LiFePo4's (all into the digital ps) so if I get an Exa I could do this too. Based on this thread I am very interested in the ExaU21 for a straight Juli@ replacement then to use eventually in conjunction with a digital crossover.
I run cplay/cmp.
The last change I did to the exaU2I was a 5 volt JFET regulator for the USB parts that was optimized for 6.6 volt input (LiFepo4 *2).
The 5 volt are normally feeding the 3.3 and 1.2 volt regulators.
This connection was cut and the 3.3 volt regulator was bypassed so a LiFepo4 battery could drive the 3.3 volt line directly and feed the 1.2 volt regulator, a reconnecting of the 1.2 volt regulator input are needed.
The GMRs was supplied with a third LiFepo4 3.3 volt source.
You will easily find the 5 volt trace coming from the USB 5 pin connector as it goes directly to a through hole (large) connection between the two PCBs.
I cut the USB 5 volt between those two locations.
On the lower (main) PCB I cut the 5 volt after the decoupling capacitor close to the through hole connection.

The picture does not show all the decoupling capacitors as some of them are located under the PCB.
The exaU2I in the picture had the three LiFepo4 inputs / connections labeled for easy connection / setup due to it was about to be sent to Bulgaria..

PS! In my setup I do not use LiFepo4 anymore as I use JFET regulators and a extremely good linear power supply that outperforms the LiFepo4..
But this is a "cost no object" setup and not available to any other than me...
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Old 25th June 2011, 11:26 AM   #600
theob is offline theob  United States
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THANK YOU!
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