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#921 | |
diyAudio Member
Join Date: Oct 2009
Location: Brisbane, Australia
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#922 | |
diyAudio Member
Join Date: Sep 2010
Location: Montreal
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Quote:
Just by curiosity, which tube output do you use on the BII setup? Thanks! |
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#923 |
diyAudio Member
Join Date: Nov 2004
Location: Back to Italy
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Post moved to Mac OSX discussion
Last edited by Gluca; 22nd November 2011 at 02:40 AM. Reason: moved |
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#924 |
diyAudio Member
Join Date: Sep 2007
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I have read the 'exaU2I - Buffalo DAC Integration' sticky but had a question for those using tridents with their Buffalo II. Where tridents are used, L8 is removed, where is the best place to tap to get DVCC. Also did you have to change the current resistor on DVCC trident to allow more current through for the 20ma used by the exau2i?
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#925 |
diyAudio Member
Join Date: Feb 2009
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Hi
is there any instruction how to connect exau2i with wm8741 DAC? I know that i should connect the: GND, DVCC , DCK and LR, but what about SCK pin? I use WM8741 reference board http://www.wolfsonmicro.com/document...tic_layout.pdf thanks in advance |
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#926 | |
diyAudio Member
Join Date: Feb 2011
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Quote:
You can find the general instructions here - http://exadevices.com/exaU2I/DIYGuide.aspx. Last edited by exa065; 7th December 2011 at 01:00 AM. |
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#927 |
diyAudio Member
Join Date: Feb 2011
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One of the most heated debates on this thread is about the benefits and drawbacks of using GMR isolators. To illustrate the benefits I came up with a simple measurement. Here is the noise spectrum when exaU2I is used with and without ground isolation.
I used TrueRTA, generic sound card and a low-noise amplifier. I used Foobar to play a WAV file: 1kHz signal at -100dB. exaU2I was connected to an ES9018 DAC, the DAC output amplified and fed into the soundcard. The measurements show A-weighted spectrum of the DAC output amplified 70 times. The first one is taken with exaU2I as is - the grounds are isolated. For the second measurement the analogue and digital grounds of the exaU2I were shortcuted. Last edited by exa065; 7th December 2011 at 02:37 AM. |
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#928 | |
diyAudio Member
Join Date: Jul 2010
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#929 | |
diyAudio Member
Join Date: Feb 2008
Location: Seattle
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Quote:
Do you have a bit-perfect DAC that is wired as the master clock for the exaU2I that you could test in a similar fashion? I'd like to see the noise floor differences, if any, when there is no DSP altering the samples. |
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#930 | |
diyAudio Member
Join Date: Feb 2011
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