Hi, i did not found any internal photos of UR824, so i made some.
If I calculate right, there are 16pcs NE5532 and 22pcs NJM2068D op-amp. I would like to change NE5532 to OPA2209 (recommended by TI as replacement) and I don't know replacement for NJM, NJM is seem to be very good opamp.
I believe, the input and output section is similar to MR816, schematic in attachments. MR816 has one 8channel DAC, but UR has 4 stereo DACs.
If I calculate right, there are 16pcs NE5532 and 22pcs NJM2068D op-amp. I would like to change NE5532 to OPA2209 (recommended by TI as replacement) and I don't know replacement for NJM, NJM is seem to be very good opamp.
I believe, the input and output section is similar to MR816, schematic in attachments. MR816 has one 8channel DAC, but UR has 4 stereo DACs.