Check the DC offset voltage between the +ve xlr terminal and turn the trimmer of the corresponding opamp until the difference is below 5mV
Repeat for the -ve xlr terminal, repeat for the other channel.
Double check the DC offset on the RCA outputs and adjust the associated trimmer of its opamp if required.
The opamps are straight thru meaning left most opamp connects to leftmost xlr pin
Thank you b0bb !!
I read your instructions carefully, but I lack understanding of balanced output offset voltage adjustment.
Is the idea to ~zero the voltage of each xlr terminal wrt ground
(of each channel) with the corresponding trimpot ?
So I drew up a block diagram to summarize what I learn/know so far (errors in the diagram are all mine).
LKS-004 has two ES9038.
Each ES9038 has four outputs (L, R, LB, RB), how are they connected to the op amp ?
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