Legato 3.1 balanced out to my Aleph J (Common mode DC) - diyAudio
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Old 12th October 2011, 04:15 AM   #1
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Default Legato 3.1 balanced out to my Aleph J (Common mode DC)

Just wondering if the common mode DC on the outputs of the Legato(Dac output stage) would be a problem for my Aleph J. Voltage between signal ground and +/- out is 7vdc. Voltage between the +/- out is 0vdc. Would it be better just to add a coupling cap to the + in on the Aleph J? Thanks for any help. I'm really looking forward to hearing these togeather

Dave
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Old 12th October 2011, 04:17 AM   #2
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either caps or xformer
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Old 12th October 2011, 04:20 AM   #3
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Wow that was a fast reply Thanks. Caps it is. On the negitive input to the Aleph J the cap is after the 22.1k resistor. Do you think I should copy that on the + side?

Dave
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Old 12th October 2011, 04:31 AM   #4
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caps from legato then 100K bleeders to gnd then Aleph

4u7 caps are big enough
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Old 12th October 2011, 10:07 PM   #5
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Click the image to open in full size.

Is that a possible solution?
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Old 13th October 2011, 02:46 AM   #6
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Is this what you mean?
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Old 13th October 2011, 08:10 PM   #7
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yup
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Old 13th October 2011, 10:32 PM   #8
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Ok, great. Thanks for the help.

Dave
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Old 13th October 2011, 10:40 PM   #9
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and , yes - short instead of C1

those CR cells are intended to be on Legato side ; that's why resistors are on outer side , to prevent any cap leakage/discharge during re/connecting procedure
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