Cambridge Audio 640C modify and circuit

Upgrade to 24/192KHz daugther board

Tai,

Be simple :
Change the opamp from NE5532 to OPA2604.
Change the capacitor to OSCON and Blackgate.

Mid level:
Change the power supply to R-CORE
Change to schottky diode

High level
Modify the Clock
Modify the SRC board into CDP, to use the max resolution of the DAC.

KK.HO