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The OP amp in the DAC is a single dual OP amp chip TI OPA2134, and it is soldered permanently. There are two dual OP amp chips (the same) in the A30. They are mounted on a socket, so they are easy to replace. If you are thinking of rolling them, I can recommend Sparkos Labs discrete OP amps. They might be expensive, but the effect is rather stunning.
Op-amp rolling in the A30 is easy, the Burson V5i is also an excellent op-amp to look into, it's what I have in my A30.
the A30 has 2 dual opamps? or did you mean 2 single channel?
How did the Burson op-amp change the sound of your A30?
How would you describe the improvements using the Burson op-amps?
The soundstage gained width and depth, the sound became more natural and detailed. It is not a night and day difference, but definitely took the A30 up a notch and I am really happy with it:
Thanks. I am going to try this... just for fun!
Have you tried rolling the opa2134 with the sparkos? I'm curious to know how it would change sound, and which model number in particular you are referring to.
Whoops. silly mistake. Meant to say burson or sparkos op amps and which model number.
By chance do you have any experience between the Sparkos and Burson V5i for the A30? Would it also make sense for me to change the op amp on the D30 to the matching discrete op amp?