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BII dual mono - how to connect just to one balanced input each channel on an I/V stage
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Hello, I read all the threads (I guess) but I didn't found a solution how to connect the BII - dual mode to a tipical I/V converter with only one balanced input each channel (one for the left and one for the right). I saw all diagrams provided, but noone forsee this case, and is also specified that in dual mono each DAC has two balanced outputs and out of phase. Of course I want to maintain 8 dac in parallel each channel and the dynamic range increased by this, but I want only one balanced output each DAC.I think a picture is better than any word: please see: http://www.olaolaonline....64555_buffalo_zapfii.jpgMay you please tell me how to connect? Thanks in advance! Andrea
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You need an I/V converter per channel. Edited by user Thursday, September 30, 2010 12:30:23 AM(UTC)
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Dear John,
I don't think, logically, this is the best solution, also because in this case I would anyway have FOUR balanced outputs, and what should I do with these than?
Dear Russ, Brian,
may you please help me?
p.s.(I've though...but maybe I'm wrong: for each channel, to put in parallel the red and black of the two outputs, considering the outputs are of the opposite phase, is this a possible solution)?
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You can use dual mono BIIs with one stereo balanced I/V, or 2 mono balanced I/Vs.
The out of phase channel will become in phase if you cross the +/- wires over for that channel.
This will also double the peak current possible, so you'll need to make sure whatever I/V stage you will use can handle the faily massive ~32mA peak that the 8 DAC channels in parallel will be able to pump out.
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Dingo is correct about the wiring. He is also correct that your I/V stage will need to handle quite a bit of current, and the I/V resistance will need to be adjusted accordingly.
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Rank: Member
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Thank you very much! May you please have the last check at this picture if everything is correct (even the dip-switch)? http://www.olaolaonline....05737_buffalo_zapfii.jpgIn the mean time I'm asking LC Audio if the Zap filter supports 32 mA peak input each channel. Thank you again, Andrea
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Location: paris, france
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Hi all,
This is my first post on the TPA product support forum.
l have a question regarding the output current capability of the Buffalo II DAC board. The output needs an I/V conversion, what is the nominal current swing at the DAC output and what value of load impedance (resistor ?) would you suggest ? My intention is to use a transformer as an I/V converter.
Thanks and best regards,
Facelvega
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Rank: Member
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Joined: 8/9/2010(UTC)
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Location: Italy
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Hello Brian, Russ.
Considering my last connection diagram is correct (I had no confirmation on that) and I still want to implement a DUAL MONO DAC (already bought) with its advantages:
- which is the iRef resistor of the ESS9018 that I can change to adapt the peak current output to the Zapfilter?
- I mean, is that possible? Or which solution do you recomend?
Otherwise I see myself obliged to buy (two!) LEGATO or IVY III and the BALSIE for the unbalanced output...
Thanks in advance for your kind help!
Andrea
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Twisted Pear Audio Support
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BII dual mono - how to connect just to one balanced input each channel on an I/V stage
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