Dear Sir
I have oppo 93 and Anedio DI DAC
Using the same CD playing in oppo
I selected between Co Axial and Toslink at DAC input
Down the line Amp is Yamaha M80/ JBL Ti series speakers
the Coaxial interconnect was Blue Jeans RG6
the OpticalToslink was not Glass, but a medium grade
interconnect costing Rs 600 ( tthey normally come for 150-300 )
there was a very clear difference in sound quality that could be
made out in two minutes listening, in my setup the Coxial was
around 30% better, I did not bother to try with Glass Cable
the DAC is based on ESS9018, with some Jitter elimination
built into the chip
Robert Bose