As many of you know - I have an NAD pre/pro (T163) that I purchased to replace my old Onkyo777 AVR. While I am happy with the increased clarity and features that the NAD offers me over the Onkyo, it is just not overwhelming me paired with the LSi speakers. (I am mostly HT and the NAD and LSi combo is just to laid back for my tastes.)
I have been doing some research and have thought about changing out the OpAmps in the pre-out and DSP boards in the NAD. I have purchased the service manual for the NAD and know people with the skills and equipment to swap out parts like this.
Right now all the OpAmps in the NAD are NJM5332M (A solid but very inexpensive opamp). From the research that I have done - something more on the lines of a AD823AN will provide me with the sound that I am looking for.
What else do I need to replace other than the opamps? I know it can get overboard really quickly, but I am just looking for a little more detailed - less warm sound from the NAD. The OpAmp change will end up costing me about $70 + labor. (labor maybe another $50 or so) - I can always change it back if the sound doesn't improve in the way that I expect it to.
Just looking for other inexpensive mods that can be done while the case is open. (or if just changing out the opamps can give me the change I am looking for)